JPH09272254A - Grain pattern-printed matter, printing plate, and manufacture of printed matter thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a design as being intended, and achieve the adaptability to characteristics of ink or the like, and consequently improve its stability and reproductivity by permitting all of sand-grain images to be a unit of grain patterns of a grain pattern-printed matter, i.e., sand-grain images constituted of a plurality of sorts of different areas of the order of being recognized visually to be printed in isolation. SOLUTION: Manufacturing conditions 10 of a grain pattern-printed matter is set on the basis of an idea of the design of grain patterns, grain pattern data is made by a sand pattern data manufacturing device 20, a gravure printing plate 40 is formed by a gravure printing device 30, thereby printing a building material printing sheet 50. Besides, the manufacturing conditions 10 of the grain pattern-printed matter are the size of a plurality of sorts of sand grain images to be a unit of the grain patterns, pieces of arrangement and distances of arrangement of the sand grain images for uniform arrangement, and a displacement magnification for displacing the sand grain images irregularly. Accordingly, an expressing can be done for grain patterns with a multi-color and high designing property having no outstanding periodicity, thus manufacturing a grain pattern-printed matter for a building material with stability maintained in its quality.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a grain pattern print for a building material having a grain pattern, a gravure printing plate used for printing the print, and a method for producing a grain print. , In particular, the sand grain image, which is the unit of the grain pattern,
A method for producing a grained pattern printed material having a plurality of different areas and having a high design property, that is, gradation, and a method for producing a grained printed material for stably and reliably obtaining the grained pattern design suggest.

[0002]

2. Description of the Related Art In recent years, printed materials for building materials such as decorative paper and wallpaper for protecting the surface of various building materials such as plywood and gypsum board have become important. This printed material for building materials has a pattern that imitates the pattern of natural products such as wood grain or stone pattern, and abstract patterns that have been artificially created such as geometric patterns and floral patterns. It is desirable that the pattern of the printed matter is not unnaturally biased and can be expressed as uniformly as possible when processed on the surface of.

In particular, in such a pattern of a printed material for building materials, a pattern obtained when a large number of sand grains are sown on a paper of a predetermined background color, that is, a uniform and random pattern without regularity, Commonly known is a printed matter called a grained pattern, and such a grained printed matter has an excellent design, and even if any part of the printed matter is used, a pattern pattern that looks almost the same can be obtained, Further, when used in a place having a large area such as a wall, a ceiling, or a floor, an endless pattern pattern having no seams and no periodicity is preferred.

By the way, in order to print the grain pattern, first, a grain pattern pattern is prepared, and a gravure printing plate is produced based on the pattern pattern. The following three methods have been proposed as the main production methods for obtaining a grained pattern pattern with high gradation and high designability.

In the first method, first, actual sand grains having different sizes and different color tones are scattered on a paper or the like to create a random grain pattern pattern, which is photographed, and then photographed. Copy on opaque film, which is a reflective film, with a plate-making camera.

Further, this opaque film is mounted on the reading drum of the image input section of the gravure engraving machine, and while optically scanning and converting into an electric signal, the gravure cylinder mounted on the gravure engraving section is simultaneously rotated to engrave diamond. A gravure printing plate is manufactured by directly engraving a gravure cell corresponding to the pattern pattern of the sand on the gravure cylinder by controlling the needle.

[0007] In the case of obtaining a grainy design pattern having high gradation with the above-mentioned first method, a plurality of gravure printing plates having different grain sizes and gradations of the grain image as a unit of the grain pattern are obtained. It is made separately, and a plurality of gravure printing plates are used to print the grain pattern.

The second method is a patent application filed by the present inventors,
By using a computer system having an image processing function as disclosed in Japanese Laid-Open Patent Publication No. 5-88332, which has already been published, image data of a grain pattern in which a random grain pattern pattern is electronically generated is generated. , A method for producing a photographic film by inputting it to a film output device such as an image setter, and printing a gravure cylinder using the film to produce a gravure printing plate.

In this method, grain patterns of sand grain images having different sizes are separately generated and electronically synthesized, or a plurality of sand grain images having different sizes and shapes are used as a grain pattern unit. Each photographic film is output separately and the films are combined to produce a gravure printing plate, or as in the first method, a separate gravure printing plate is produced for each photographic film and the pattern of the grain is produced. To print.

The third method is to convert the image data of the grain pattern in which a grain pattern is electronically generated using a computer system into engraving data used for controlling the gravure engraving machine, This is a method of directly inputting the engraving data to an engraving control device of a gravure engraving section which is an output device of the gravure engraving machine and engraving a pattern pattern of a grain on a gravure cylinder. In this method, since the image data of the grain pattern having different sizes and shapes of the grain image as the unit of the grain pattern is not output to the photographic film, the gravure printing plate of the grain pattern can be produced more easily than the second method. can do.

[0011]

By the way, in the production of the above-mentioned conventional grain pattern printed matter and its printing plate, a highly designed grain pattern having gradations, in particular, a minute grain called a fine grain pattern. There are some problems when trying to obtain a pattern pattern of a grain composed of various sand grain images.

For example, in the above-mentioned first and second methods, since the grain pattern is printed using a plurality of gravure printing plates, a gravure printing plate corresponding to the number of printing colors is required. Printing costs are high, and since a plurality of gravure printing plates are used, quality deterioration easily occurs due to misregistration. Therefore, if a highly designed grain pattern with gradation can be printed on one plate, it is desirable to print on one plate as much as possible.

Further, in the grain pattern printing using a plurality of gravure printing plates, since the gravure printing plates are separately and independently prepared, the printed grain patterns overlap each other on the printed matter, and the printing ink Due to bleeding, a large grain pattern that can no longer be said to be a grain pattern is generated, causing streak unevenness that gives the impression that many sand grain images that are the units of the grain pattern are connected, When a grain pattern is printed on a printing stock that has a large roughness and is not smooth, ink adhesion may be unstable due to unstable printing ink, resulting in unnatural color tone and gradation. A pattern habit that gives the impression of a simple pattern is generated.

On the other hand, the second and third electronically generating a random grain pattern using a computer system.
Even in the case of the method, when the image data having different sizes and shapes of the sand grain image that is the unit of the grain pattern is created independently, as in the case of the printing by the plurality of gravure printing plates, the sand grain images are different from each other. In succession, unexpectedly large sand grains are formed, which causes streaks and patterns.

Furthermore, when the sand grain images of different sizes are independently generated and synthesized, in the case of a fine grain pattern in which one pixel of the sand grain image of the basic size has the size of one gravure cell,
To change the size of the sand grain image, a plurality of pixels are connected to form a sand grain image with, for example, 4 pixels (2 × 2 pixels) or 9 pixels (3 × 3 pixels). Is restricted to an integer multiple of the gravure cell.

When the photographic film is converted into engraving data for the gravure engraving machine in the first and second methods, for example, the photographic film is mounted on the reading drum of the image input section of the gravure engraving machine, When optically scanning and converting to an electrical signal, unexpected halftone images occur at the image edges of the sand grain image.

Similarly, in the second and third methods described above, a sand pattern pattern is created using image data with a coarse pixel density for display on a television monitor of a computer system, and the image data When converting the density to the engraving data of a gravure engraving machine with a high pixel density, an unexpected halftone image may occur in the scan line interpolation processing of the image data, and the grain pattern originally designed by the computer system A gravure printing plate for printing a grain pattern containing a halftone image, which is different from the above, can be produced, and depending on the characteristics of the printing material and printing ink used, uneven ink adhesion is likely to occur The quality is greatly reduced.

In particular, in the case of producing a grain pattern printed matter based on a fine grain image referred to as a fine grain pattern, the size of the grain image is limited to a constant value, and the individual grain image units serving as the grain pattern units are individually controlled. When you try to control the size of the gravure cell based on the pixel data with different pixel values, if you do not limit the arrangement interval of the sand grain images, the sand grain images will be connected to each other due to the same cause as above, and an unexpected shape Since a gravure cell having a large size is formed, it is difficult to obtain a grain-patterned printed matter having a high design property, in which streaking and pattern habit are likely to occur.

Further, even if the same pixel value is set for all the sand grain images which are the units of the grain pattern, the data format of the grain pattern data of the gravure plate making apparatus must be accurately matched with the grain pattern data. In the gravure printing apparatus, unexpected pixel data that changes the size or shape of the gravure cell is generated, and the gravure cell having a desired size cannot be obtained.

Further, as described above, the printing material roll for decorative materials called decorative paper generally has a large surface roughness and poor smoothness, so that the ink transfer becomes unstable, and the printing material roll Since the ink adherence tends to be uneven, streak unevenness that gives a continuous impression of a sand grain image and pattern curl that gives an impression of repeating an unnatural pattern often occur.

Therefore, the present invention solves the above-mentioned various problems when producing a grain pattern printed matter, particularly when producing a grain pattern called a fine grain pattern, and was originally intended. As designed, it is easy to adapt to the characteristics of printing ink and printing stock, and further, it prevents unintended continuation of sand grain images or streaking of ink due to ink fading and streaking, and always reproduces stably. Method for creating grain pattern data to obtain a grain pattern pattern with good and accurate gradation, and a gravure printing plate for printing the grain pattern pattern, and for producing the printing plate It is an object of the present invention to provide a method for creating plate-making data suitable for various gravure printing plates, and to obtain a grain-patterned printed matter having a high design gradation using the gravure printing plate.

[0022]

DISCLOSURE OF THE INVENTION The present invention is directed to a grain design printed matter for building materials having a high gradation, particularly a grain design printed matter called a fine grained design, and a grained design pattern thereof. In the method for producing a gravure printing plate for printing, first, in a data memory space of a grain pattern data creating apparatus for generating a grain pattern pattern, the size of a grain image as a unit of grain pattern is corresponded. Pixel values of multiple types are created uniformly and randomly, and sand particle pixel data is created, and then all sand particle images are removed by removing other sand particle pixels adjacent to the sand particle pixels of the sand particle pixel data. Are separately arranged, and one gravure cell creates grain pattern data corresponding to one grain image.

Further, in correspondence with a gravure plate making apparatus for producing a gravure printing plate for printing a grain pattern pattern,
The grain pattern data is converted into plate making data of the gravure plate making apparatus, and the plate making data is inputted to the gravure plate making apparatus, which is constituted by a plurality of different opening areas, and all the gravure cells are isolated. To produce a gravure printing plate, which is placed in a printing unit of a gravure printing machine, and a grain pattern pattern is printed on a printing material such as a decorative paper to obtain a grain pattern printed matter. As a result, the above problems have been solved, and more detailed means for solving the problems will be described below.

According to the first aspect of the present invention, there is provided a grain pattern printed matter in which a grain pattern pattern is printed, wherein a grain image as a unit of the grain pattern has a plurality of different areas which are visually recognizable. It is a grain pattern printed matter that is configured and in which all the sand grain images are printed in isolation.

Further, the invention of claim 2 is, in addition to the invention of claim 1, a grain pattern printed material in which a grain image as a unit of grain pattern is composed of 2 to 10 different areas.

According to the third aspect of the present invention, there is provided a gravure printing plate which is used for printing a grain pattern printed matter on which a grain pattern pattern is printed, and which corresponds to one sand grain image which is a unit of the grain pattern. A gravure printing plate in which a gravure cell is formed, the gravure cell is formed with a plurality of different opening areas, and all of them are arranged independently.

The invention of claim 4 is, in addition to the invention of claim 3, a gravure cell formed corresponding to a sand grain image which is a unit of a grain pattern, having 2 to 10 different opening areas. It is a gravure printing plate.

Furthermore, the invention of claim 5 is, in addition to the invention of claim 3 or 4, characterized in that a plurality of different opening areas are formed corresponding to the sand grain image which is the unit of the grain pattern. Gravure cells are all 0.005-1m
It is a gravure printing plate formed in a range of m ² .

According to a sixth aspect of the present invention, there is provided a method for producing a grain pattern printed matter, wherein a plurality of different pixel values corresponding to the areas of the sand grain image limited to a plurality of types are set in the grain pattern data creating device. Sand particle pixel data is created by arranging them in a predetermined data memory space in a dispersed manner.

Next, when the sand grain pixel data is arranged in the arrangement state of the sand grain image when printing the grain pattern, the sand grain pixels given the pixel values are arranged so as not to be adjacent to each other. After performing the adjacent pixel removal processing to create the grain pattern data, based on the grain pattern data,
It is a method for producing a grain pattern printed matter in which a grain pattern pattern is printed.

Further, in addition to the invention of claim 6, the invention of claim 7 sets the shape condition of the sand grain image in the grain pattern data creating device in advance, and the pixel of the sand grain pixel of the grain pattern data is set. Based on the value, preset shape condition of the sand grain image, and the dot drawing density of the gravure printing machine, the dot image data of the sand grain image composed of a plurality of different areas with a predetermined shape is generated and the gravure printing is performed. Create plate making data for the plate making device.

Next, the plate-making data is input to a gravure plate making machine, and a pattern of a grain of sand formed on a photoresist film applied to a gravure cylinder is formed of a plurality of types of sand grain images having a predetermined shape and different areas. A pattern dot image is exposed and drawn, and then the photoresist film in the sand grain image area is removed, and then the gravure cylinder is corroded by a gravure corrosive machine to form gravure printing plates with multiple types of gravure cells with different opening areas. Is produced and a grain pattern print is printed using the gravure printing plate.

Furthermore, the invention of claim 8 is, in addition to the invention of claim 6 or claim 7, when the grain pattern data is converted into plate making data of the gravure plate making device, the grain pattern data creating device The shape of the gravure cell corresponding to the sand grain image is selected based on the shape condition of the sand grain image based on any one of the preset rhombus, rectangle, or circle, or a combination of multiple types, and the selected gravure The shape of the cell and the maximum pixel value of the sand grain pixel that can be set in the data memory space of the grain pattern data creating device are set to 10
Dot image data forming a sand grain image having a different area is generated based on a plurality of different pixel values of the sand grain pixel at a ratio of 0% area ratio.

Next, the dot image data is compressed into a run length format and converted into plate-making data, and the plate-making data is input to a gravure plate making apparatus to form a plurality of kinds of gravure cells having different opening areas. It is a method for producing a gravure printing plate, in which a grain pattern pattern is printed by using the gravure printing plate.

According to a ninth aspect of the invention, in addition to the seventh aspect of the invention, the grain pattern data subjected to the adjacent pixel removal processing is arranged in accordance with the pixel value and the number of arranged pixel values is less than or equal to the total number of types. Separation into a plurality of grain pattern data, producing a plurality of gravure printing plates corresponding to each grain pattern data, and using the plurality of gravure printing plates to print a grain pattern pattern It is a manufacturing method.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION The details of a grain pattern printed material, a printing plate thereof, and a method for producing the printed material of the present invention will be described with reference to the drawings.

FIG. 21 shows an example of a grain pattern in the grain pattern print of the present invention, which is an enlarged view of a part of the grain pattern print. As shown in FIG. It is desirable that the pattern is a state in which small sand grain images, which are the units of the grain pattern, are evenly and randomly distributed, and that there is no specific offset pattern pattern. In addition, this "equal and random" means that the number of sand grain images arranged in a certain area is
The number is almost the same everywhere, and the individual positions of the sand grain image are irregularly arranged.

The pattern pattern of the grain of the present invention based on the countless number of sand grain images which are evenly and randomly arranged is the minimum that a person having normal eyesight can recognize when observing at a distance of 1 m or more from the printed matter. It is composed of almost the same number of sand grain images per area, and each sand grain image can be recognized 30 cm
When closely observed, the patterns are all in a randomly arranged pattern of sand.

Further, in the example of FIG. 21, two different sizes are used.
Even when observing sand grain images of different sizes independently, each type of sand grain image is arranged uniformly and randomly, and each individual sand grain image is spliced with other sand grain images. Placed independently without
Furthermore, there are no streaks in the arrangement of the sand grain image and no pattern creases. Furthermore, there is no periodicity of the pattern pattern in any of the top, bottom, left, and right directions, and it looks like a similar pattern pattern in any part of the printed matter. Even when the printed materials are spliced together, a grained pattern pattern that seems to be continuously spliced is formed.

The above-mentioned grain pattern is printed on, for example, a printing material roll for construction materials called decorative paper to produce a grain pattern printed matter. For construction materials, printing is usually performed on a long roll paper of 930 mm width. In order to print a continuous continuous pattern pattern on the original fabric, an endless grain pattern pattern is produced on a cylindrical gravure cylinder so that no seam appears, and a gravure printing plate is produced and printed.

In order to make a seamless grain pattern pattern on the gravure cylinder, in the method for producing a grain pattern printed product of the present invention, a gravure plate machine such as a gravure engraving machine or a laser drawing machine is used. Produce a gravure printing plate.

In the present invention, in order to obtain the grain pattern, a gravure cell having a plurality of different opening areas and all of which are arranged independently is used to print a grain image as a unit of the grain pattern. The gravure cell corresponding to the sand grain image is configured with 2 to 10 different opening areas, and each gravure cell is substantially 0.005-1.
A gravure printing plate formed with an opening area in the range of mm ² is manufactured.

[Outline of Treatment] FIG. 1 shows the steps of the method for producing a grain pattern printed product of the present invention, including the steps for producing the gravure printing plate. FIG. 2 shows the configuration of the grain pattern printed matter producing apparatus of the present invention.

As shown in FIG. 1, in the production process of the grain pattern printed matter according to the present invention, first, the grain pattern printed matter is produced based on the design plan of the grain pattern pattern shown in FIG. Condition 10 is set, and the grain pattern data creation device 20 shown in FIG.
Enter the grain pattern condition in to create grain pattern data,
Next, a gravure printing plate 40 is produced by the gravure printing plate apparatus 30 shown in FIG. 2, and a pattern pattern of a grain of sand is printed on the printing material web 50 for building material by the gravure printing machine by using the gravure printing plate, and the sand is printed. A pattern print is produced.

In the production process of the grain pattern printed material of the present invention, first, in the grain pattern condition setting step of step 1, a plurality of sizes (Si) of the grain image as a unit of the grain pattern and the grain image. The number of sand grain images to be evenly distributed (N
i), the arrangement interval (pi), and the production condition 10 of the grain pattern printed matter such as the displacement magnification (Vi) for irregularly displacing the evenly arranged sand grain image within a certain range. It is set in the pattern data creating device 20.

Next, in the initialization process of step 2, a plurality of types of pixel values corresponding to the size (area) of the sand grain image are evenly and randomly distributed in the data memory space 25 of the grain pattern data creating apparatus 20. Pixel array areas for distributed arrangement are arranged in a one-dimensional or two-dimensional pixel array,
A predetermined number of pixels (x, y, n) are arrayed and initialized with an initial value (0).

Here, a plurality of kinds of pixel values corresponding to the size of the sand grain image, which is the unit of the grain pattern, are arranged evenly and randomly to create the sand grain pixel data. The one-dimensional and two-dimensional pixel array methods in 1) will be described.

FIG. 3 and FIG. 4 are schematic views showing a grain pattern image and a gravure cell array state corresponding to the grain image in the grain pattern print and the gravure printing plate of the present invention. FIG. 3 shows an array state of diamond-shaped sand grain images formed by a gravure engraving machine, and FIG. 4 shows an array state of rectangular sand grain images formed by a laser drawing machine.

In FIG. 3 and FIG. 4, the diamond-shaped or rectangular-shaped graphic arrays with reference numerals “1” to “n” indicate the arrangement position of the gravure cells corresponding to the sand grain image in the cylindrical gravure printing plate. The grain pattern printed matter printed with this gravure printing plate was developed in the circumferential direction (X).
Also, in the printing width direction (Y), an endless grain pattern having continuous grain patterns is formed.

The diamond-shaped and rectangular "1" to "n"
The code array indicates the array order of the pixels of the sand grain image in the data memory space 25 of the grain pattern data creating apparatus 20, and further, the gravure engraving machine 31 and the laser drawing machine 3
It is also the engraving order or drawing order of the gravure cell in 2. Further, the circumferential direction (X) is also the printing direction (X) of the grain pattern printing in the gravure printing machine shown in FIG.

In FIG. 3, solid-line drawn "1", "2", "3" from rhombic figures "1", "11", "20", "30", ... In the print width direction (Y). , "4", ...
The symbols "y-1" and "y" represent the arrangement order of the gravure cells corresponding to the printing width W of the gravure printing plate and the number y thereof.

In addition, a diamond-shaped figure "1" in the circumferential direction (X)
"1", "2" drawn from "10" with a solid line,
"3", ..., "x" and "1", "2", "3", ... drawn from the diamond-shaped figures "11" to "19" by broken lines.
The symbol "x-1" is the circumferential direction (X) of the gravure printing plate.
The array order and the number of gravure cells corresponding to the circumferential length L of are shown.

In FIG. 3, the number of gravure cells arranged in the circumferential direction (X) is the number of gravure cells in the even number column (x−1) when the number of gravure cells in the even number column is the odd number column. It seems that there is one less than the number (x) of gravure cells, but when actually engraving gravure cells on a cylindrical gravure cylinder with a gravure engraving machine, the odd and even rows are engraved consecutively, Circumferential length L of gravure printing plate
The number of gravure cells corresponding to is the same for both the odd and even columns and is x-1 / 2.

On the other hand, in the array of gravure cells shown in the rectangular shape in FIG. 4, the number x of gravure cells in the circumferential direction (X) is all the same in the printing width direction (Y), and the number of gravure cells The array densities Dx and Dy are also substantially the same in the circumferential direction (X) and the printing width direction (Y).

In FIG. 3, "1", "2", "3", "4", ..., "Y-1", in the print width direction (Y).
The array density Dy of the gravure cells indicated by the symbol “y” is “1” to “x” or “1” to “x +” in the circumferential direction (X).
It is about twice the array density Dx of the gravure cells shown by the code "1".

Furthermore, the lower half of the diamond "10" is the diamond "1".
1), similarly the lower half of the diamond “29” is above the diamond “30”, and the diamonds “19” and “2”.
0 ”, rhombus“ 38 ”and rhombus“ 39 ”are rhombus“ 1 ”
"0" and "11", rhombus "19" and "20", rhombus "2"
9 "and" 30 ", diamonds" 38 "and" 39 ", ... engraved in a gravure engraving machine, engraving continuously in a spiral shape when engraving a gravure cell corresponding to a sand grain image on a gravure cylinder. To be done.

As shown in FIG. 3, in the two-dimensional xy pixel array area composed of the number of pixels x in the circumferential direction (X) and the number of pixels y in the print width direction (Y), the X direction is set. When the gravure cells are formed with different densities in the X direction and the Y direction so that the X direction is coarse and the Y direction is dense, the pixel array of the data memory space 25 is arranged. Is preferably two-dimensional. On the other hand, as shown in FIG. 4, when gravure cells are formed with the same density in the X and Y directions, the pixel array of the data memory space 25 is arranged in the X direction. , Or one-dimensionally arranged in the Y-direction.

That is, according to the pixel array system of these two types of data memory space, in the gravure printing apparatus 30, the array density of the gravure cells corresponding to the sand grain image which is the unit of the grain pattern that can be formed is the circumferential direction. (X) and print width direction (Y)
If the two are almost the same, the one-dimensional pixel array method is selected.

On the other hand, in the two-dimensional pixel array method, the array density of the gravure cells corresponding to the sand grain image is in the circumferential direction (X).
And the printing width direction (Y), or the circumferential direction (X) and the printing width direction (Y) are used to intentionally change the arrangement density of the sand grain images to improve the design of the grain pattern. You can also choose to increase.

Further, the two-dimensional pixel array system is applied when the gravure plate making apparatus 30 for producing the gravure printing plate 40 is mainly a gravure engraving machine 31, while the one-dimensional pixel array system is gravure. Printing plate device 30 for producing a printing plate
However, it may be applied to the laser drawing machine 32.

However, the pixel arrangement of the data memory space 25 is not limited depending on the model of the gravure printing apparatus 30, and only the pattern pattern of the grain formed by the arrangement method of the pixels is different.

Therefore, the condition 1 of the production condition 10 of the grain pattern printed matter
As an item, the pixel array of the data memory space 25 is one-dimensional when a plurality of types of pixel values corresponding to the size of the sand grain image that is a unit of the grain pattern are arranged uniformly and randomly, or 2 It is necessary to select whether to make an array in the dimension.

The pixel value of the pixel array area in the data memory space 25 is the size of the gravure cell before the pixel values (Pi) corresponding to the size of the sand grain image are evenly and randomly distributed. It is necessary to initialize the data memory space 25 in advance by using an initial value (for example, 0) indicating that the value is 0, that is, there is no gravure cell corresponding to the sand grain image.

The above-mentioned grain pattern condition setting step and initialization step are preparatory steps for preparing grain pattern data,
The pixel data creating process of step 3 and the adjacent pixel removing process of step 4 are the grain pattern data creating process.

First, the pixel data creation step S of step 3
3, the pixel values corresponding to the areas of the plurality of types of sand grain images are arranged in the pixel arrangement area of the data memory space 25 at fixed arrangement intervals (pi), respectively, and further incorporated in the grain pattern data creating apparatus 20. By using a random number value obtained by a random number generating function (not shown) and a preset displacement magnification (Vi), the arrangement position of the pixel value of the sand grain image is displaced within a certain range, and the sand grain is displaced. Create pixel data.

The sand grain pixel data is as shown in FIG.
As shown in (b) and (c), the predetermined number of pixels (n) is set to 1
The pixels are arranged in a dimension and a plurality of types of pixel values (A, B, C) corresponding to the size of the sand grain image are sequentially and evenly and randomly distributed, or are arranged in FIG. ),
As shown in (c) and FIG. 10 (a), a predetermined number of pixels (x × y) are two-dimensionally arranged, and plural kinds of pixel values (A, B, C) are arranged in a dispersed manner. The data.

Next, in the adjacent pixel removing step of step 4, when the sand grain pixel data is arranged in the arrangement state of the sand grain image when printing the pattern pattern of the sand, the plural kinds of pixel values are given. Adjacent pixel removal processing is performed so that the sand grain pixels are not adjacent to each other to create grain pattern data in which all the sand grain pixels are arranged in isolation.

As the above-mentioned grain pattern data, as shown in FIG. 6A or FIG. 10B, the grain pattern data of the grain data created in the pixel data producing step of step 3 is printed. In this arrangement state, the other sand grain pixels (a, b, c) adjacent to the sand grain pixel are removed, and FIG.
As shown in (b) or FIG. 10 (c), it is data in which all the sand grain pixels (A, B, C) are arranged independently.

That is, in the grain pattern data, the pixel values corresponding to a plurality of types of areas of the sand grain image are evenly and randomly distributed, and all the sand grain pixels to which the pixel value is given are It is placed in isolation.

Further, in the embodiment of the present invention, a gravure printing plate for printing a pattern pattern of sand is produced by the plate making data producing process of step 5 and the printing plate producing process of step 6 shown in FIG. To do.

In the plate making data creating step of step 5,
The grain pattern data created in step 4 is converted into plate-making data for a gravure engraving machine or a laser drawing machine, corresponding to the model of the gravure printing plate making device for producing the gravure printing plate.

Further, if necessary, the grain pattern data created in step 4 is divided into a plurality of grain pattern data having a total number of types of pixel values or less arranged according to the pixel value, Converts grain pattern data into multiple prepress data.

Further, in the printing plate making process of step 6, the plate making data created in step 5 is input to a gravure plate making device such as a gravure engraving machine or a laser drawing machine to correspond to a grain pattern pattern. Gravure cell is formed by directly engraving on the gravure cylinder, or on the photoresist film applied to the gravure cylinder,
Dot image of the sand grain image that becomes the pattern pattern of the grain of sand is exposed and drawn with a laser beam, and then the photoresist film in the sand grain image part is developed and peeled off, and then the sand grain image part is corroded to form a gravure cell in the gravure cylinder, Produce a gravure printing plate for printing a grain pattern.

The gravure printing plate produced in step 6 has gravure cylinders in which gravure cells having plural kinds of opening areas corresponding to the size of a sand grain image which is a unit of a grain pattern are evenly and randomly dispersed. Is a gravure printing plate in which all the gravure cells are arranged independently.

Next, in step 7, the gravure printing plate on which gravure cells corresponding to the pattern pattern of the grain is formed is mounted on a gravure printing machine, and a gravure printing plate for a construction material such as decorative paper is provided with a grain. A design is printed to produce a grain pattern printed matter.

As a result, in the obtained grain pattern printed matter, the grain image as a unit of the grain pattern is composed of a plurality of different areas which are visually recognizable, and the grain images are all isolated. It is a printed, grain-printed product with a high gradation that is made by design.

[Apparatus Configuration] Next, an embodiment of an apparatus for producing a grain pattern printed matter according to the present invention will be described. FIG. 2 is a diagram for explaining an apparatus configuration for producing a grain pattern printed matter.

As shown in FIG. 2, an apparatus for producing a grain pattern printed matter of the present invention comprises a grain pattern data producing apparatus 20 for producing grain pattern data for printing a grain pattern pattern, Using a gravure printing plate device 30 for producing a gravure printing plate 40 for printing a grain pattern pattern based on the grain pattern data created by the grain pattern data creating device 20 and the gravure printing plate 40 , A gravure printing machine for printing a grain pattern on a printing material web 50 for building materials.

The grain pattern data creating apparatus 20 creates a grain pattern pattern having a high design property on the basis of the production condition 10 of the grain pattern printed matter, and the gravure engraving machine 31 for producing the gravure printing plate 40 and A computer system such as a laser drawing machine 32 for creating plate-making data suitable for the gravure printing apparatus 30.

As shown in the figure, the grain pattern data creating apparatus 20 sets the grain pattern condition setting conditions for creating the grain pattern data based on the input fabrication conditions 10 of the grain pattern printed matter. A unit 21, a pixel data creation unit 22 that creates sand grain pixel data based on set conditions, an adjacent pixel removal unit 23 that removes adjacent pixels of the sand grain pixels of the sand grain pixel data, and creates grain pattern data, And a plate-making data creating section 24 for converting the grain pattern data into plate-making data of the gravure plate making device 30.

Further, the grain pattern data creating apparatus 20 stores the processed data when generating, creating, and converting the sand grain pixel data to be created, the grain pattern data, the plate-making data, and the like. A data memory space 25 is provided.

In the data memory space 25, a plurality of types of pixel values corresponding to the size (Si) of the sand grain image are arranged in a uniform and random manner to create the sand grain pixel data. As described above, there are a method of arranging the pixels of the data memory space 25 in one dimension and a method of arranging the pixels in two dimensions, and the arrangement method is selected in advance in the grain pattern condition setting unit 21.

Furthermore, the grain pattern data creating device 20
Is a data input device 26 such as a keyboard, a mouse or a digitizer for inputting production conditions 10 required for producing a grain pattern printed matter, a gravure engraving machine 31 or a laser drawing machine 32 for producing a gravure printing plate. A data output device 27 for outputting the plate making data of the gravure plate making device 30 to the outside, and a display for temporarily displaying or printing and confirming the designed grain pattern. An image output device such as the device 28 or the printing device 29 is provided.

The data memory space 25 provided in the grain pattern data creating apparatus 20 is not only a semiconductor memory such as a RAM which is a main storage unit of the grain pattern data creating apparatus 20 but also a magnetic disk which is an auxiliary storage unit. , Magnetic tape, magneto-optical disk, optical disk, etc.,
The magnetic tape or the magneto-optical disk is also used as a data exchange medium for inputting the plate making data created by the grain pattern data creating device 20 to the gravure plate making device 30.

A gravure printing apparatus 30 suitable for producing a gravure printing plate 40 for printing a grain pattern of the present invention.
As shown in FIG. 2, a diamond engraving needle is directly pressed against the rotating gravure cylinder, the engraving needle is driven based on a control signal, and a gravure cell is placed on the copper plating layer on the surface of the gravure cylinder. A gravure engraving machine 31 of the engraving method is generally used.

Recently, a super-hard synthetic resin layer coated and hardened on the surface of a gravure cylinder is irradiated with a laser beam having a large energy, such as a carbon dioxide gas laser or a YAG laser, to thermally melt the resin layer to form a gravure cell. There is also a model of the forming method.

In these electronic engraving type gravure printing apparatus, generally, the engraving density of 40 to 100 cells / cm can engrave the gravure cells in the gravure cylinder, and the engraving of about 5000 cells / sec. Have the ability.

As another gravure printing plate apparatus, while rotating a gravure cylinder whose surface is coated with a photoresist film, the output of a laser beam which moves and scans in the print width direction is intermittent based on an image signal, and the range of 15 to 200 Laser drawing machine 3 for drawing dot images with a density of dots / mm
There are two.

When a gravure printing plate is produced by using the laser drawing machine 32, the latent image of the grain pattern of the exposed and drawn photoresist film is developed and the photoresist of the gravure cell portion corresponding to the sand grain image is developed. After removing the film, the gravure corroding machine 33 corrodes the gravure cell portion to produce a gravure printing plate 40.

The gravure printing plate apparatus 30 drives the engraving needle and controls the output of the laser beam to form an engraving cell in the gravure cylinder, and an image signal to the engraving control apparatus. Data input device 2 using magnetic tape device or magneto-optical disk device for inputting
6 is provided.

In the gravure plate making apparatus 30, the arrangement density of engravable gravure cells and the format format of the gravure cell engraving data are partly different depending on the maker of the plate making apparatus and the model of the plate making apparatus. The dot drawing density and the dot image data format are different even in the drawing system and engraving system.

In the gravure printing apparatus 30, the gravure cylinders for forming the gravure cells for printing the pattern pattern of the grain are fitted with a fitting shaft or a fitting hole at both ends for mounting in the printing unit of the gravure printing machine. It is a metal cylinder equipped with.

The surface of the gravure cylinder is provided with a copper plating layer for forming a gravure cell by engraving or corrosion, and the gravure engraving machine 31 and the gravure corrosion machine 33 are provided.
Then, after engraving or corroding the concave gravure cells corresponding to the grain pattern, hard chromium plating is applied to the surface to prevent the copper plating layer from oxidizing and printing plate durability. Gravure printing plate 4 with improved power
Get 0.

On the other hand, the printing stock 50 for building materials that prints a grain pattern is usually called decorative paper, and is made of titanium paper containing titanium oxide and a coloring pigment, and has improved heat resistance. Resin-impregnated paper impregnated with synthetic resins such as phenol, melamine, diallyl phthalate, and polyester is widely used as a decorative paper for plywood. Others include plastic films such as vinyl chloride and polyester, and metal foils such as aluminum and copper.

Generally, these printing stocks for building materials such as titanium paper and resin-impregnated paper have a large surface roughness as compared with gravure printing papers such as books and magazines, and therefore have a grain pattern, particularly a fine grain pattern. Gravure cells that correspond to the grain pattern formed on the gravure printing plate can be used to prevent the occurrence of streaks and streaks and to print reliably It is desirable to limit the size of a certain range.

In the present embodiment, the printing unit of the gravure printing machine for printing the pattern pattern of the grain has an ink pan 4 for supplying printing ink to the rotating gravure printing plate 40.
1, a doctor blade 42 for scraping off excess ink other than the concave gravure cell portion formed on the surface of the gravure printing plate 40, and a printing material 50 are pressure-bonded to the gravure printing plate 40 to print the printing material 50. The ink cylinder embedded in the gravure cell portion of the gravure printing plate 40 is transferred to the printing stock 50 while being conveyed in the direction (X).

The gravure printing plate 40 mounted on the printing unit of the gravure printing machine and the impression cylinder 43 are driven to rotate, so that the printing material 50 such as a decorative paper is printed on the seamless endless grain of the present invention. Pattern patterns are continuously printed, and the solvent of the printing ink is vaporized by a drying device (not shown) to obtain a grain pattern printed matter.

[Processing Operation (One-Dimensional Array)] Next, the method for producing a grain pattern printed matter according to the present invention will be described in detail with reference to the grain pattern printed matter production process chart shown in FIG. The method for creating a grain pattern in the present invention can be applied to both a one-dimensional array and a two-dimensional array. However, in the manufacturing process described below, The case will be described.

(Step 1) First, in step 1, the production condition 10 of the grain pattern printed matter is input to the grain pattern data creating device 20 through the data input device 26, and the grain pattern condition setting unit 21 is used to make the sand. Set the pattern data creation conditions. The details of this step will be described below.

The condition 10 for producing a grain pattern printed matter is set based on an assumed design pattern of the grain pattern as shown in FIG. 21, and a plurality of sizes of the sand grain images which are the units of the grain pattern are set. Size (Si) and shape (Tp), the number of arrangements (Ni) for evenly arranging the sand grain images, or the arrangement interval (p
i), a displacement magnification (Vi) for irregularly displacing the evenly arranged sand grain images, dimensions of the gravure printing plate 40 for grain pattern printing (circumferential length L, printing width W), and Gravure cell engraving density or drawing density (circumferential direction Dx, width direction D of the gravure printing plate device 30 for producing a gravure printing plate
y), the size of the gravure printing plate 40, and the printing plate device 30
The number of array pixels (x, y, n) of the sand grain image obtained from the engraving density or the drawing density of the gravure cell.

Further, a pixel array system of the data memory space 25 provided in the grain pattern data creating apparatus 20 for uniformly and randomly arranging the grain image, and a grain pattern for preventing streaks and pattern habits Pixel arrangement in odd and even columns for generating a pattern, isolation conditions for sand grain images such as the number of pixels removed from adjacent pixels, and the model of the gravure plate making device 30 for producing a gravure printing plate and its The format of plate-making data corresponding to the model, the dot drawing density (dx, dy) and the number of dot pixels (X, Y) set when the gravure printing apparatus 30 is the laser drawing machine 41, and the gravure cell Manufacturing condition 10 of the minimum grain interval (Qx, Qy) and the maximum dot size (Rx, Ry)
Is set.

Now, the production condition 10 of the grain pattern printed matter in the method of producing the grain pattern printed matter of the present invention will be described in more detail.

As shown in Table 1, the grain pattern production conditions 10 for producing the grain pattern print shown in FIG. 1 are the conditions concerning the arrangement of the grain image as the unit of grain pattern and the grain image. And a gravure printing plate for printing a grain pattern and conditions for a gravure printing plate device for producing the gravure printing plate.

[0104]

[Table 1]

First, based on the design pattern of the design pattern of the grain of sand, the shape Tp and size of the sand grain image such as the diamond R, the rectangle S, or the circle T as shown in FIGS. Different sizes Si (S1, S2, S3, ... Sm) of the sand grain images corresponding to the different sand grain images A, B, and C are set. However, when there are m types of size of the sand grain image, i is an integer of 1 to m.

The size Si of the sand grain image is recognizable by a person having normal eyesight from a distance of about 30 cm, for example, 16 dots / mm (about 63 μm) to 4 dots / mm (250 μm) to 1 dot / mm (1 mm)
Set two or more types with a certain size.

Further, in the grain pattern data producing apparatus 20, the size Si of the sand grain image is converted into pixel values Pi (P1, P2, P3, ... Pm) suitable for the plate making data of the gravure plate making apparatus. I shall.

When the laser drawing machine 32 is selected as the gravure plate making device 40, a gravure cell corresponding to a sand grain image is formed with a dot image as shown in FIG. Although the shape can be selected, when the gravure engraving machine 31 is selected, only the gravure cell of the gravure cell of the gravure engraving machine and the driving mechanism of the engraving needle can be selected.

Secondly, since the gravure cells corresponding to the plurality of types of sand grain images of different sizes are arranged uniformly and randomly on the plate surface of the gravure printing plate for grain pattern printing, the plurality of types of sand grains The number of arrangements Ni (N1, N2, N3, ... Nm) or the arrangement interval pi for each image size Si
(p1, p2, p3, ... pm) and displacement magnification Vi (V1, V2, V3, ...
Vm) is set, and it is specifically digitized based on the circumferential length L in the circumferential direction (X) and the printing width W in the printing width direction (Y).

However, the arrangement interval pi is the gravure cell Ni corresponding to the sand grain images of different sizes which are the units of the grain pattern within the range of the plate surface dimensions (circumferential length L × print width W) of the gravure printing plate. It is a fixed arrangement interval for evenly arranging the pieces.

Specifically, as shown in FIGS. 3 and 4, engraving density or drawing density of gravure cells by the gravure printing apparatus, that is, array density (circumferential direction Dx, printing width direction Dy) and gravure printing. The total number of gravure cells obtained from the plate surface dimensions (L × W) of the plate, that is, the total number of pixels n
A value obtained by dividing (n = (L × Dx) × (W × Dy)) by the arrangement number Ni of the sand grain image, that is, the arrangement interval pi = total pixel number n / arrangement number Ni. The symbol i represents the i-th of m kinds of gravure cells corresponding to sand grain images of different sizes.

Further, the displacement magnification Vi is within the range of the plate surface size (L × W) of the gravure printing plate, and the Ni evenly arranged sand grain images of different sizes are converted into a grain pattern data creating apparatus. It is the maximum displacement amount for arranging the arrangement position irregularly, that is, randomly by using the random number value (RND) obtained from the random number generating function provided in 20. However, when the random number value RND is in the range of 0 to 1, it is desirable to set the displacement magnification Vi to a value that is at least twice the arrangement interval pi.

The above-mentioned size Si and shape Tp of the sand grain image,
Table 2 shows the production conditions of the grain pattern printed matter with respect to the number of arranged sand grains Ni, the arrangement interval pi, and the displacement magnification Vi.

[0114]

[Table 2] (However, i shall be m types.)

Thirdly, in parallel with the setting of the size Si, the pixel value Pi, the shape Tp of the sand grain image, the arrangement number Ni of the sand grain corresponding image, the arrangement interval pi, and the displacement magnification Vi, the unit of the grain pattern is set. The number of pixels x in the circumferential direction (X) and the number of pixels y in the printing width direction (Y) suitable for the size Si of the sand grain image and the arrangement interval pi of the sand grain image are set.

The numbers of pixels x and y are the circumferential length L in the circumferential direction (X) of the gravure printing plate 40 and the gravure in the gravure engraving machine 31 and the laser drawing machine 32 as described with reference to FIGS. The number of pixels x and y obtained by the cell array density Dx, the print width W in the print width direction (Y), and the gravure cell array density Dy, which are necessary for creating the sand grain pixel data and the grain pattern data. Data memory space 2
5, pixel arrangement and capacity, display device 28 and printing device 29
This is the number of pixels that is the basis of the required data amount when outputting to.

Fourthly, the production conditions of the gravure printing plate differ depending on the model and performance of the gravure plate making apparatus. When the gravure engraving machine 31 is selected as the gravure plate making apparatus 30, the gravure engraving machine 31 is selected. In the range of engraving density of gravure cells that can be engraved with, the optimum engraving density Dx in the circumferential direction (X) that can correspond to the maximum size of the previously designed sand grain image and its minimum arrangement interval, and the printing width The engraving density Dy in the direction (Y) is set.

Fifth, based on the circumferential length L and the printing width W of the gravure printing plate 40, the number of pixels x in the circumferential direction (X), the number of pixels y in the printing width direction (Y), and the gravure printing plate. The total number of pixels n corresponding to the plate area of is obtained. However, the number of pixels x = circumferential length L × array density Dx, the number of pixels y = printing width W × engraving density D
y, the total number of pixels n = the number of pixels x × the number of pixels y.

The number of pixels x in the circumferential direction (X) is as shown in FIG.
In the case where the sand grain image is diamond-shaped and the gravure plate making apparatus for producing the gravure printing plate is a gravure engraving machine as shown in FIG.
The number increases. Therefore, at that time, the total number of pixels n is increased by the number of pixels y / 2.

The number of pixels x or x−1 in the circumferential direction (X), the number of pixels y in the printing width direction (Y), and the total number of pixels n are the data memory space of the grain pattern data creating apparatus 20. Two
5, the required number of array pixels when a plurality of types of pixel values Pi of the sand grain image that is the unit of the grain pattern are evenly and randomly arranged.

Further, the data memory space 2 required for creating the gravure cell engraving data of the gravure engraving machine 31.
In order to confirm the configuration and capacity of No. 5, and the design pattern of the sand created in the data memory space 25, it is a basis for temporarily displaying or outputting to the display device 28 or the printing device 29. The number of pixels.

Regarding the size of the gravure printing plate, the array density of gravure cells, and the number of array pixels in the pixel array region,
Table 3 shows the production conditions of the grain pattern printed matter.

[0123]

[Table 3]

Sixth, when the sand grain pixel data is created by arranging a plurality of kinds of pixel values Pi corresponding to the size of the sand grain image which is the unit of the grain pattern evenly and randomly,
As described above, there are two types of pixel arrangement methods in the data memory space 25, but here, the one-dimensional pixel arrangement method is selected.

Seventhly, in the one-dimensional pixel array method, when the shape of the sand grain image is rhombic, the array density Dy of the gravure cells in the print width direction (Y) is a circle as shown in FIG. Since the arrangement density Dx in the circumferential direction (X) is almost twice, the number of adjacent pixels to be removed is set to 8 so that the sand grain images are not connected to each other.
The isolation condition of the sand grain image is set as a pixel.

On the other hand, when the shape of the sand grain image is rectangular as shown in FIG. 4, the array density Dy of the gravure cells in the printing width direction (Y) and the array density Dx in the circumferential direction (X) are almost the same. Since they are the same, even if the removal pixel number of adjacent pixels is set to 6 under the isolation condition of the sand grain images, the sand grain images will not be connected to each other.

That is, a plurality of types of different pixel values Pi corresponding to the size of the sand grain image are arranged in the data memory space in a uniform and random manner based on the arrangement interval pi and the displacement magnification Vi. In the included sand grain pixel data, when the pixel adjacent to each sand grain pixel is a sand grain pixel, when the sand grain pattern pattern is printed, the sand grain images are connected to each other to produce an unexpected grain pattern pattern, and Since this causes streak unevenness, the number of adjacent pixels to be removed is set in advance for performing the adjacent pixel removal processing.

In this embodiment, as shown in FIG.
In the circumferential direction (X), the sand grain pixel data is divided into a predetermined number x of odd number columns and x−1 even number pixel columns,
Further, the pixel columns are alternately shifted by half a pixel, and the pixels are arranged according to the arrangement state of the gravure cells when the gravure printing plate is manufactured.

Then, the pixel values of at least 6 neighboring pixels adjacent to the sand grain pixel in which the pixel value Pi is arranged are returned to the initial value (0), and the adjacent pixel removal processing for isolating all the sand grain pixels is performed. Grain pattern data configured so that the sand grain pixels are not adjacent to each other is created.

The above-described removal processing of the adjacent pixels of the grain pattern data will be described in detail with reference to FIGS. 3 and 4.

In FIG. 3 and FIG. 4, the images with the reference symbol “x” and the symbol “*” adjacent to the sand grain image with the reference symbol “Q” are non-sand grain images and are of two types, large and small. The black rhombus figure and the black rectangular figures of two sizes, large and small, respectively show sand grain images of different sizes.

Further, in the print width direction (Y), reference numerals "1", "2", "3", "4", ..., "Y-1",
In each of the image columns denoted by “y”, the odd-numbered column and the even-numbered column are arranged so as to be offset from each other by a half image in the circumferential direction (X),
All sand grain images are arranged in a houndstooth pattern.

Further, when the image with the symbol "Q" in FIGS. 3 and 4 is the sand grain pixel described above, the six images with the symbol "x" adjacent to the image "Q" and the symbol of FIG. By using the two images of "*" as non-sand grain images,
Under the production condition 10 of the grain pattern printed matter described in the above, the arrangement of the gravure cells for isolating all the sand grain images can be obtained, and it is possible to prevent the generation of the pattern curl or streaks of the grain pattern.

In the two images with the symbol “*” adjacent to the sand grain image “Q” in FIG. 3, the gravure cell array density Dy in the print width direction (Y) is the gravure cell array density in the circumferential direction (X). If it is almost the same as Dx, it does not need to be converted to a non-sand grain image element.

That is, as shown in FIG. 3, when the diamond-shaped sand grain images are arranged in a zigzag pattern without gaps, the number of adjacent pixels is eight, but the odd number column and the even number column in the printing width direction (Y) are even. When the rows are arranged with a gap, the center position of the two images of the symbol "*" adjacent to the sand grain image "Q" is the farthest from the other 6 pixels, causing streaks and patterns. Because it will not be.

On the other hand, in the rectangular gravure cell array shown in FIG. 4, the rectangle is substantially square, and the gravure cell array densities Dy and Dx in the printing width direction (Y) and the circumferential direction (X) are:
If the densities are almost the same, only the 6 images with the code “x” need to be non-sand grain images.

However, if the gravure cell shape is transformed into a rectangle and the gravure cell array densities Dx and Dy differ by a ratio of 2 or more, it is necessary to further increase the number of adjacent non-sand grain images as in FIG. Occurs.

Table 4 shows the above-mentioned pixel arrangement method and conditions for producing a grain pattern printed matter concerning isolation of the sand grain image.

[0139]

[Table 4]

Eighth, the grain pattern data obtained by removing the adjacent pixels corresponding to the non-sand grain image adjacent to the sand grain image is
Corresponding to the model of the gravure plate making device 30 for producing a gravure printing plate for printing a grain pattern, the grain pattern data creating device 20
Set the format of plate-making data when converting into plate-making data adapted to each plate making device.

In the present invention, as the gravure plate making device 30, a gravure engraving machine 31 for mechanically engraving a gravure cell directly with an engraving needle, and a photoresist applied to the gravure cylinder with a laser are used. Of the laser drawing machine 32 that draws a dot image on the film,
Since two types of gravure printing apparatus are used, the format of platemaking data, either gravure cell engraving data or gravure cell drawing data, is set according to each model.

Ninth, under the above manufacturing conditions, when the laser drawing machine 32 is selected as the gravure printing plate apparatus 30, a sand grain image is drawn with fine dots, so that the dot drawing densities dx, dy, Based on the circumferential length L of the gravure printing plate in the circumferential direction (X) and the printing width W of the printing width direction (Y), it corresponds to the dot pixel number X corresponding to the circumferential length L and the printing width W The number of dot pixels Y to be set is set.

At this time, the total number of dot pixels can be obtained from the respective number of dot pixels X and Y. However, if the plate surface size of the gravure printing plate is large, the required data memory space 25 also has an enormous capacity. The number of dot pixels X = circumferential length L × dot drawing density dx, and the number of dot pixels Y = printing width W × dot drawing density dy.

The dot pixel numbers X and Y are used as the plate making data of the laser drawing machine 32 by using the sand grain pixel data and the grain pattern data composed of the pixel numbers x and y created by the grain pattern data creating device 20. This is the condition required when converting.

Further, when the laser drawing machine 32 is selected as the gravure printing device 30, the circumferential length L of the gravure printing plate and the number of dot pixels X and Y corresponding to the printing width W are set to two.
In the three-dimensional dot image area, the dot image data of the sand grain image is generated based on a plurality of types of pixel values Pi of the sand grain image which is the unit of the grain pattern in the grain pattern data composed of the number of pixels x × y. At this time, from the ratio (X / x, Y / y) of each pixel number in the circumferential direction (X) corresponding to the minimum arrangement interval of the sand grain image and the print width direction (Y), it corresponds to the arrangement interval of the sand grain image. Minimum dot spacing Qx = X / x, Qy = Y / y
Set.

Furthermore, when the dot image data of the sand grain image is generated based on the plural kinds of pixel values Pi of the sand grain pixel data, the dot pixel number Rx of the gravure cell corresponding to the sand grain image having the maximum size, Set Ry.

However, unless the number of dot pixels Rx, Ry of the maximum size gravure cell is less than 1.5 times the minimum dot interval Qx, Qy corresponding to the arrangement interval of the sand grain image, laser drawing is performed. Gravure cells corresponding to the sand grain image drawn on the machine may be connected to each other.

Table 5 below shows the types of plate-making data of the gravure plate making apparatus and the conditions for producing a grain pattern printed matter when the laser drawing machine 32 is used as the gravure plate making apparatus 30.
Shown in

[0149]

[Table 5]

(Step 2) Next, based on the production condition 10 of the grain pattern printed matter shown in Tables 2 to 5 set in the grain pattern data creating device 20 in the above step 1, the data of step 2 is set. The memory space 25 is initialized.

This process is a process performed by the grain pattern condition setting unit 21 of the grain pattern data creating device 20 in FIG.

Here, first, a predetermined capacity that is built in or externally connected to the grain pattern data creating device 20 for sequentially creating the grain data, the grain pattern data, and the plate making data of the plate making device. After the pixel array area of the data memory space 25 is one-dimensionally arrayed by the specified method, the pixel array area is initialized with a non-sand particle pixel having a size of the sand particle image of 0, that is, an initial value (0). .

The data memory space is initialized by forming a pixel array area corresponding to the number of pixels n (n = x × y or n = x × y + y / 2) when the pixel array system is one-dimensional. Further, by initializing the pixel array area of the data memory space 25 with the pixel value "0", all the pixels are made into non-sand grain pixels.

(Step 3) Next, in the pixel data creating step of Step 3, the sand grain pixel data is created based on the grain pattern manufacturing conditions input and set in Step 1.

This process is a process performed by the pixel data creating section 22 of the grain pattern data creating device 20 in FIG. The details of this processing will be described below.

In the step 3 of creating pixel data, the number of arrangements Ni for evenly arranging the sand grain images of the grain pattern production condition 10 or the arrangement interval pi and the evenly arranged sand grain images are irregularly displaced. By using the displacement magnification Vi and the random number generation function provided in the grain pattern data creating apparatus 20, a plurality of types of pixel values corresponding to the size Si of the sand grain image, that is, a plurality of types of different sizes are used. Pixel values Pi corresponding to the gravure cells are evenly and randomly distributed in the pixel array area of the initialized data memory space 25, and a plurality of types of sand grain pixels are mixed in the array of non-sand grain pixels. This is a process of creating sand grain pixel data.

Here, there are plural kinds of sizes S of the sand grain image.
After converting i (S1, S2, S3, ... Sm) into pixel values Pi (P1, P2, P3, ... Pm) suitable for the gravure engraving machine 31 and the gravure printing apparatus 30 such as the laser drawing machine 32, , Along with the designated shape Pt (diamond R, rectangle S, or circle T) of the sand grain image, a plurality of types of pixel values Pi are evenly and randomly distributed in the one-dimensional pixel array area of the initialized data memory space 25. Disperse and arrange.

When arranging a plurality of types of pixel values Pi in the pixel array area, first, in order to evenly arrange them, a predetermined arrangement interval pi is obtained for each pixel value by the following procedure. That is, when the pixel array is one-dimensional, the arrangement interval pi = total pixel number n / arrangement number Ni is calculated.

Further, in order to randomly arrange a plurality of types of pixel values Pi, the grain pattern data creating device 20
In the case where the pixel array is one-dimensional, the random value RND (for example, a real value having a uniform appearance rate in the range of 0 to 1) generated in step 1 is used, and the displacement magnification Vi set for each pixel value is used. , And the arrangement position Pi (j) of the pixel value Pi is calculated by the following formula.

That is, when the pixel array in the data memory space 25 is one-dimensional, the type of pixel value is i, the array order of pixel values is j, and the j-th arrangement position Pi ( j) = j × arrangement interval pi + displacement magnification Vi ×
(Random number value RND-0.5) is calculated, and the data memory space 25
The pixel value Pi is set in the pixel array area of. Note that j is 1
~ An integer value of the arrangement number Ni, and pi is an arrangement interval of the pixel values Pi.

FIG. 5 and FIG. 6 show a procedure for creating sand grain pixel data in the data memory space 25 of the grain pattern data creating apparatus 20 for explaining the first embodiment of the present invention. A data creation procedure suitable when the gravure engraving machine 31 is selected as a gravure printing apparatus for creating a gravure printing plate will be shown.

5 (a), (b), and (c) show the pattern pattern of the grain of sand formed by the diamond-shaped gravure cell corresponding to the sand grain image, which has already been explained in FIG. 3, using the gravure engraving machine 31. A plurality of types of pixel values Pi corresponding to the size of the sand grain image when the pixel array in the data memory space 25 is one-dimensional, which is optimal for engraving the gravure cell
The arrangement procedure of is shown.

In the figure, from "1" shown in FIG.
Pixels labeled with the symbol "n" are arranged one-dimensionally in the order of the symbols designated with the condition 1 for producing the grained pattern printed matter in advance.
After initializing all pixels with the initial value (0) set at 0, three kinds of pixel values Pi (A, B, C) corresponding to the size of the sand grain image are set to each pixel value "A". , "B", "C"
The arrangement number Ni (NA, NB, NC) set corresponding to is arranged at predetermined pixel positions in the data memory space 25 uniformly and randomly.

That is, the number of pixels n (the number of pixels x × the number of pixels y
-The number of pixels y / 2) In the one-dimensional data memory space 25 composed of pixels, the pixel positions when the pixel values Pi are evenly and randomly dispersed are arranged in advance at the pixel position. Placement interval p set in manufacturing condition 10
i (pA, pB, pC), and displacement magnifications Vi (VA, VB, VC) for randomly arranging, and a random number value RND obtained by the random number generation function provided in the grain pattern data creating device 20. Deploy. However, the random number value RND can be a value of 0 to 1.

Here, the j-th arrangement position of the pixel value Pi is j * arrangement interval pi + displacement magnification Vi * (random number value RND-
It is obtained by the equation of 0.5). However, the displacement magnification Vi gives the maximum displacement amount when the pixel values Pi are randomly arranged using the random number value RND in the data memory space 25. That is, the arrangement position Pi (j) of the pixel value Pi (A, B, C) of the i-th j-th pixel value Pi is j × arrangement interval pi + displacement magnification Vi × (random value RND-0.5. ).

As shown in FIG. 5A, first, the first pixel value P1 = “A” is equalized to the pixel positions obtained by the above equation,
In addition, the number N1 = NA of pieces arranged at random is sequentially dispersed and arranged. However, the arrangement interval p1 = pA and the displacement magnification V1 = VA.

Then, as shown in FIG. 5B, the number N2 of arranged pixels is N2 = N on the pixel column in which the pixel value "A" has already been arranged.
B pixel values P2 = B, arrangement interval p2 = pB, displacement magnification V
2 = VB, and stack them one after another.

Similarly, as shown in FIG. 5 (c), the pixel value P3 = C of the arrangement number N3 = NC is set at the arrangement interval p3 = pC, the displacement magnification V3 = VC, and the pixel values "A" and " By sequentially arranging “B” on the already-arranged pixel row, the pixel value “A” corresponding to the sand grain images of a plurality of sizes,
Sand particle pixel data in which "B" and "C" are evenly and randomly distributed and arranged is obtained.

When the pixel value "A" arranged earlier in FIG. 5A is overlapped with the pixel value "B" arranged later as shown in FIG. 5B. Is to be replaced with the pixel value “B” arranged later.

In the procedure described above, the data memory space 2 is calculated using the arrangement interval pi, the displacement magnification Vi, and the random number value RND.
In the one-dimensional pixel array area having the number of pixels n configured in 5, the number of arranged Ni particles corresponding to the plurality of sizes of sand particle images are evenly and randomly distributed and arranged. , To obtain sand grain pixel data composed of non-sand grain pixels in the state where the pixel value is “0”.

(Step 4) Next, in Step 4, in order to prevent the occurrence of the pattern habit of the grain pattern and the unevenness of the streaks, the sand grain pixel data created in Step 3 is
In order to prevent the sand grain pixels of the sand grain pixel data from being adjacent to each other, the adjacent sand grain pixels are removed by the adjacent pixel removing unit 23 of the grain pattern data creating apparatus 20 of FIG. 2, and all the sand grain pixels are arranged independently. Created the grain pattern data.

Specifically, first, the pixel array of the data memory space 25 forming the sand grain pixel data is divided into an odd number column and an even number column, and the pixel columns are shifted from each other by half a pixel,
Arrange according to the arrangement state of the gravure cells when producing the gravure printing plate.

Then, for all the sand grain pixels of the sand grain pixel data, all the gravure cells corresponding to the sand grain image are isolated by returning the pixel values of at least 6 adjacent pixels to the initial values, so that the sand grain pixels are set to 1 Create the grain pattern data corresponding to the gravure cell.

That is, in the sand grain pixel data,
The sand grain pixels in which the pixel values Pi corresponding to the sand grain images of a plurality of sizes are arranged are evenly and randomly arranged in the data memory space 25, but when the gravure printing plate is manufactured in the arrangement state. , If the gravure cells corresponding to the sand grain image are adjacent to each other, it may cause stripe unevenness or pattern habit. Therefore, based on the isolation condition of the sand grain image of the production condition 10 of the grain pattern print, The other adjacent sand grain pixels are returned to the initial value (0), and the grain pattern data in which all the gravure cells are arranged independently are created by the following procedure.

First, when the pixel array when the sand grain pixel data was created was one-dimensional, the number of pixels x number of pixels according to the actual array state of the gravure cells in the gravure printing plate.
Returning to a two-dimensional pixel array with the number of pixels y, further dividing x pixel columns in the X direction or y pixel columns in the Y direction into odd columns and even columns, and mutually substituting each pixel column in the X direction. , Or Y
The sand grain pixel data is rearranged in a state shifted by half a pixel in the direction.

Next, with respect to all the sand grain pixels in the sand grain pixel data, at least 6 adjacent to each of the sand grain pixels are provided.
Neighboring pixels (8 neighboring pixels when neighboring pixels are 8 pixels)
Is returned to the initial value (0) so that all of the sand grain pixels are non-sand grain pixels, thereby obtaining the grain pattern data in which all the sand grain pixels are arranged isolated from other sand grain pixels.

That is, in the sand grain pixel data in which the pixel values Pi corresponding to the sand grain images of a plurality of sizes are evenly and randomly arranged, the pixel adjacent to the pixel value Pi is another sand grain pixel. In this case, the pattern becomes stiff and the stripes are uneven. First, the pixel array of the one-dimensional array shown in FIG. 5C is returned to the two-dimensional array shown in FIG. 6A. The pixel rows aligned with each other are divided into odd-numbered rows and even-numbered rows, and the pixel rows are shifted from each other by half a pixel, and the pixel rows are arranged in the gravure cell arrangement state of the gravure printing plate as shown in FIG.

Further, all the pixel values of 6 neighboring pixels (8 neighboring pixels when the neighboring pixels are 8 pixels) adjacent to the pixel values "A", "B", and "C" are all initial values (0). Then, as shown in FIG. 6B, the grain pattern data in which all the sand grain pixels are arranged independently are obtained.

(Step 5) Next, in Step 5, in order to produce the gravure printing plate 40 by the gravure printing apparatus, the grain pattern data created in Step 4 was adapted to the model of the gravure printing apparatus 30. Performs processing to convert to plate making data.

This process is a process performed by the plate-making data creating section 24 of the grain pattern data creating apparatus 20 of FIG.

Here, the pixel value Pi corresponding to the sand grain images of a plurality of sizes obtained in step 4 is obtained.
However, the gravure engraving machine 3 converts the grain pattern data in which all the sand grain pixels are arranged uniformly and randomly.
1 or it is converted into plate-making data suitable for the gravure plate-making device 30 such as the laser drawing machine 32. However, since the data format of the plate-making data is different depending on the maker and model of the plate-making device, here is a typical example. Regarding the model, a method of converting the grain pattern data into the plate-making data will be described.

As described above, the gravure plate making apparatus 30 suitable for producing the gravure printing plate 40 is the gravure engraving machine 3 for directly engraving gravure cells on the gravure cylinder.
1 and a plate making apparatus 3 having different functions, such as a laser drawing machine 32 for exposing and drawing a dot image with a laser beam on a gravure cylinder whose surface has been coated with photoresist in advance.
Since there is 0, the grain pattern data is converted into the gravure printing plate 4
Corresponding to the model of the gravure plate making apparatus 30 for producing 0, the plate making data creating section 24 is for the gravure engraving machine,
Alternatively, it is converted into plate-making data for a laser drawing machine.

First, the engraving data of the gravure cell when the gravure engraving machine 31 is used as the gravure printing apparatus 30 is composed of n pixels forming the grain pattern data,
Gravure consisting of 4n pixels by sequentially duplicating and enlarging all the pixels into four pixels having the same pixel value in the order of engraving the gravure cells, that is, in the order of pixels having the circumferential direction (X) as the main scanning direction. Convert to cell engraving data to obtain plate making data.

FIG. 7 is a data configuration diagram schematically showing an example of the plate making data of the gravure engraving machine 31, that is, the gravure cell engraving data, and the grain pattern data shown in FIG. 6 (b). Is schematically shown as being converted into plate-making data of a gravure engraving machine for producing the gravure printing plate 40.

For example, the pixel value "C" at the pixel positions 1 and 1 in the grain pattern data in FIG. 6B is the same pixel value "C" in the engraving data of the gravure engraving machine in FIG.
Are duplicated and expanded to four pixels “CCCC” having the same, and similarly, all pixels including non-sand grain pixels are duplicated and expanded to four pixels to form gravure cell engraving data.

For example, the pixel value “A” in FIG.
As shown in FIG. 7, “B” indicates “AAA”.
"A" and "BBBB" have been converted, and the pixel value (0) of the non-sand grain pixel has been converted to the symbol "□□□□" for convenience of explanation. Note that the data in the first column to the y-th column are separated for each column.
The data is continuous up to the column.

As described above, when the gravure plate making apparatus 30 to be used is the gravure engraving machine 31, all pixel values of the grain pattern data are duplicated and expanded to every four pixels and converted into plate making data. .

The gravure printing plate apparatus 30 used is
In the case of the laser drawing machine 32, a sand grain image designated by any one of a rhombus, a rectangle, or a circle, and a pixel value corresponding to a plurality of types of sand grain images of different sizes included in the grain pattern data. Based on the shape condition Tp, the dot image data corresponding to a plurality of types of gravure cells each having a predetermined shape and different sizes are generated, and the dot image data is converted into run-length format gravure cell drawing data. Convert to create plate making data.

(Step 6) Next, in Step 6, in Step 5, the grain pattern data is converted into the gravure cell engraving data of the gravure engraving machine 31 or the gravure cell drawing data of the laser drawing machine 32, respectively. The plate making data obtained by the above is input to a predetermined gravure plate making device 30, and the gravure plate making device 30 forms gravure cells corresponding to the sand grain image in the gravure cylinder based on the plate making data. A gravure printing plate 40 for printing a grain pattern is produced.

This step is performed by the gravure engraving machine 31 of the gravure printing plate apparatus 30 shown in FIG.
And the process performed by the gravure corrosive machine 33.

Here, when the gravure plate making device 30 is the gravure engraving machine 31, the plate making data is inputted to the engraving control device of the gravure engraving machine 31, and 4 pixels of the inputted gravure cell engraving data are set to 1 The engraving control device converts the block-making data for engraving into engraving control signals for the gravure cell.

Then, in the gravure engraving machine 31, a diamond engraving needle is directly pressed against the gravure cylinder rotating in the circumferential direction (X), and the engraving needle is driven based on the engraving control signal. ,as well as,
A gravure cell corresponding to a grain pattern is continuously engraved in a spiral pattern on the copper plating layer on the gravure cylinder surface by a scanning mechanism that drives the gravure cell engraving mechanism in the print width direction (Y).

In the engraved gravure cell, the engraving depth of the engraving needle is controlled based on a plurality of types of pixel values corresponding to the size of the sand grain image that is the unit of the grain pattern, and a plurality of types of different depths and openings are set. Forming an inverted pyramidal gravure cell having an area, the gravure cells having a plurality of types of opening areas are evenly and randomly distributed on the gravure cylinder surface, and all gravure cells are other gravure cells. And it was placed in isolation without succession,
A gravure printing plate 40 for printing a grain pattern is obtained. The opening shape of the gravure cell formed by the engraving needle of the gravure engraving machine 31 is usually a rhombus.

FIG. 8 shows the pixel value "A" shown in FIG.
It is the schematic diagram which represented the state which input the data for gravure cell engraving containing "B" and "C" into the gravure engraving machine 31, and engraved the gravure cell in the gravure cylinder by the engraving control mechanism.

In the figure, three types of rhombic gravure cells having different areas are formed corresponding to the pixel values "A", "B", and "C" of the engraving data. However, in FIG. 8, the engraving density Dy of the gravure cells in the print width direction (Y) is represented by the same density as the density Dx in the circumferential direction (X), but in reality, as shown in FIG. Is about 2
Gravure cells are engraved with double the density.

In this case, since the large gravure cell in the third column in the Y direction is adjacent to the large gravure cell in the first column, it corresponds to the non-sand grain pixel indicated by the symbol "*" in FIG. , Which may cause streaks or patterns, it is treated as a pixel adjacent to the pixel value “C” at the pixel position “1, 1” in the isolation process of the sand grain image of FIG. It is desirable to return to the initial value (0) which is a sand grain pixel.

If the gravure cell engraving density in the gravure engraving machine 31 is approximately the same in the circumferential direction (X) and the printing width direction (Y), as shown in FIG. Only 6 pixels are required.

By the above steps, plural kinds of gravure cells of different sizes corresponding to plural kinds of sand grain images of different sizes are arranged uniformly and randomly,
Further, a gravure printing plate 40 for printing a grain pattern is obtained in which all gravure cells are arranged independently.

The gravure plate making apparatus 30 used is
In the case of the laser drawing machine 32, the plate making data, which has been compressed into the run length format and converted into the gravure cell drawing data, is input to the laser drawing machine 32, and the laser drawing machine 32 extracts the original data from the run length format. After reconstructing the dot image data of the gravure cell, a dot image of a gravure cell with a diamond, rectangular, or circular shape of different size is exposed and drawn with a laser beam on the photoresist film previously applied to the gravure cylinder. After developing and peeling, the gravure corroding machine 33 corrodes the gravure cell portion of the gravure cylinder to form a gravure cell, and a gravure printing plate 40 for printing a grain pattern pattern.
Get.

As described above, the gravure cylinder in which a gravure cell having a predetermined shape and corresponding to a plurality of types of sand grain images of different sizes is formed, is subjected to hard chrome plating on the surface of the copper plating layer and then chrome plated. The surface is ground to obtain a gravure printing plate 40 for printing a grain pattern.

(Step 7) Next, in Step 7,
Print the grain pattern. This printing is performed using the gravure printing machine shown in FIG.

In this process, in step 6 described above, the gravure engraving machine 31, or the laser drawing machine 32,
A gravure printing plate device 30 such as a gravure corroding machine 33 is mounted on a printing unit of the gravure printing machine 40 by engraving or corroding a gravure printing plate 40 in which gravure cells corresponding to the pattern pattern of a grain pattern are formed on the surface of the gravure cylinder. do it,
A grain pattern pattern is printed on a printing material web 50 for building materials such as decorative paper to obtain a grain pattern print of the present invention.

[Processing operation (two-dimensional array)] Next, in the method for producing a grain pattern printed material of the present invention, when the pixel array area of the data memory space 25 is two-dimensional when the sand grain pixel data is created Will be described, but description of the processing common to the case of the one-dimensional array will be omitted.

(Step 1) First, in step 1 of FIG. 1, the grain pattern condition is set. Here, the method for producing a grain-patterned printed material according to the present invention will be described in detail with reference to the production process chart of the grain-patterned printed article shown in FIG.

First, in step 1, the production condition 10 of the grain pattern printed matter is input to the grain pattern data creating device 20 through the data input device 26, and the grain pattern condition setting unit 21 is entered.
Set the grain pattern condition. The details of this step will be described below.

In this step, the grain pattern condition that is different from the one-dimensional pixel array when creating the sand grain pixel data is that the pixel array of the data memory space 25 in the grain pattern data creating device 20 is two-dimensional. In connection with this, the number of arrangements Ni of pixel values and arrangement interval pi for evenly arranging the sand grain image, and the setting method of the displacement magnification Vi for irregularly displacing the pixel values evenly arranged Is different from the one-dimensional pixel array.

Here, the two-dimensional pixel array of the sand grain pixel data can be selected to enhance the design of the grain pattern, and the two-dimensional pixel array is the gravure printing plate 40 for producing the gravure printing plate 40. The printing plate device 30 is mainly applied to the gravure engraving machine 31, while the one-dimensional pixel array of the sand grain pixel data is used for producing the gravure printing plate 30.
However, it may be applied to the laser drawing machine 32.

However, the pixel arrangement of the sand grain pixel data in the data memory space 25 is not limited depending on the model of the gravure printing apparatus 30, and only the design pattern of the sand grain generated by the pixel arrangement method is different. .

In the two-dimensional pixel array, the arrangement number Ni of the sand grain images is set to the circumferential direction (X) and the printing width direction (Y).
By setting different values for each, it becomes easier to design the grain pattern, so for example, the number NiX (N1X, N2X, N3X ... NmX) arranged in the circumferential direction (X) , The number of arrangements NiY (N1Y, N2Y, N3Y ... corresponding to the print width direction (Y) ...
NmY) is set.

Similarly, an arrangement interval pi for arranging the sand grain image evenly and at random on the plate surface of the gravure printing plate for grain pattern printing and the pixel values evenly arranged are irregular. With respect to the displacement magnification Vi for displacing to, the arrangement interval piX in the circumferential direction (X) and the displacement magnification ViX are
Further, the arrangement interval piY in the print width direction (Y) and the displacement magnification ViY
Are set individually.

At this time, the numbers NiX and NiY of the gravure cells arranged in the circumferential direction (X) and the printing width direction (Y) and the arrangement intervals piX and piY are the circumferential length L and the printing width W of the gravure printing plate. On the other hand, the arrangement number NiX = circumferential length L / arrangement interval piX, and the arrangement number NiY = printing width W / arrangement interval piY, respectively.

As described above, when the pixel array for creating the sand grain pixel data is two-dimensional, the number of sand grain images arranged in Table 2 described above, the arrangement interval pi, the displacement magnification Vi.
Respectively in the X direction in the circumferential direction (X) and the Y direction in the print width direction (Y) corresponding to the two-dimensional pixel array regions of the pixel numbers x and y, respectively, as shown in Table 6. Set to.

[0213]

[Table 6]

When the pixel array for creating the sand grain pixel data is two-dimensional, the gravure cell engraving density or the drawing density of the gravure plate making device 30 for producing the gravure printing plate is set in the circumferential direction (X ) And the print width direction (Y) are significantly different from each other, or the arrangement density of the sand grain images is intentionally made different in the circumferential direction (X) and the print width direction (Y), so that the design of the sand grain has high designability. This is an effective method when making a pattern.

As the arrangement density of the sand grain image is set individually in the circumferential direction (X) and the printing width direction (Y), it is natural that an odd number of rows is used to prevent uneven stripes and pattern habits. Pixel arrangement in even-numbered columns, isolation conditions for sand grain images such as the number of pixels removed from adjacent pixels, and minimum gravure cell dot intervals (Qx, Qy) set when the gravure printing apparatus 30 is a laser drawing machine 41. And the maximum dot size (Rx,
The setting values of the production conditions 10 of the grain pattern printed matter such as Ry) also differ.

(Step 2) Next, on the basis of the production conditions 10 of the grain pattern printed matter shown in Tables 2 to 5 and 6 set in the grain pattern data creating device 20 in the above step 1, The initialization process of the data memory space 25 in step 2 is performed.

This process is a process performed by the grain pattern condition setting unit 21 of the grain pattern data creating device 20 in FIG.

Here, first, the pixel array area of the data memory space 25 having a predetermined capacity, which is built in or externally connected to the grain pattern data creating device 20 for creating the sand grain pixel data, is set to the designated number of pixels ( After the pixels are arranged two-dimensionally in (x, y), the pixel arrangement area is initialized with a non-sand grain pixel of which the size of the sand grain image is 0, that is, an initial value (0).

(Step 3) Next, in the pixel data creating step of step 3, the sand grain pixel data is created based on the grain pattern manufacturing conditions input and set in step 1.

This process is a process performed by the pixel data creating unit 22 of the grain pattern data creating device 20 in FIG. The details of this processing will be described below.

In the pixel data creating step of step 3 in the present embodiment, the number of arranged NiX, NiY or the arrangement interval piX for evenly arranging the sand grain images under the grain pattern manufacturing condition 10 is set.
Corresponding to the size Si of the sand grain image by using piY, the displacement magnifications ViX and ViY for irregularly displacing the evenly arranged sand grain image, and the random number generation function provided in the grain pattern data creating device 20. Different types of pixel values, that is, pixel values Pi corresponding to a plurality of types of sand grain images of different sizes
In the initialized data memory space 25 in a pixel array region uniformly and randomly dispersed to create sand grain pixel data in which a plurality of types of sand grain pixels are mixed in the array of non-sand grain pixels. is there.

When arranging the pixel values Pi in the pixel array area, first, in order to arrange them uniformly, the predetermined arrangement intervals piX and piY are obtained by the following procedure. That is, when the pixel array is two-dimensional, the X-direction arrangement interval piX = the number of pixels x / the arrangement number NiX and the Y-direction arrangement interval = the number of pixels y / the arrangement number NiY.
Are individually requested.

Further, in order to randomly arrange the pixel values Pi, a random number value RND (for example, a real value having a uniform appearance rate in the range of 0 to 1) generated by the grain pattern data creating device 20, and When the pixel array is two-dimensional, the displacement magnification Vi
Arrangement position P (i, j) of pixel value Pi using X and ViY
Is calculated by the following formula.

That is, when the pixel array of the data memory space 25 is two-dimensional, the j-th pixel in the X direction is calculated by using the arrangement interval piX and the displacement magnification ViX in the X direction and the arrangement interval piY and the displacement magnification ViY in the Y direction. , The arrangement position Pi (j, k) of the kth pixel value Pi in the Y direction = (j × arrangement interval piX + displacement magnification ViX × (RND−0.5), k × arrangement interval piY + displacement magnification ViY × (RND -0.5)) is calculated, and the pixel value Pi is arranged at the pixel position (x, y) in the two-dimensional pixel array area having the number of pixels x and y in the data memory space 25.

Here, j is the j-th arrangement number NiX of pixel values Pi in the X direction, and k is the arrangement number N of pixel values Pi in the Y direction.
The pixel position x = j × arrangement interval piX + displacement magnification ViX × (RND−0.5) in the Y direction, and the pixel position y = k × arrangement interval piY + displacement magnification ViY × (RND in the Y direction −
0.5).

According to the above-mentioned procedure, the arrangement intervals piX and piY,
Using the displacement magnifications ViX, ViY and the random value RND, a plurality of types of sizes of NiX × NiY are arranged in a two-dimensional pixel array area of the number of pixels (x × y) configured in the data memory space 25. Pixel values “0” in which the pixel values Pi corresponding to the sand particle image are distributed evenly and randomly.
The sand grain pixel data composed of the non-sand grain pixels in this state is obtained.

Here, as a second embodiment of the present invention,
A laser drawing machine is selected as a plate making device for making a grain pattern data in a two-dimensional pixel array in the data memory space 25 of the grain pattern data making device 20 and especially for making a gravure printing plate. The procedure for creating the plate-making data in this case will be described.

FIG. 9 shows a pattern pattern of a grain formed by gravure cells corresponding to the diamond-shaped or rectangular sand-grain images already described in FIGS. 3 and 4, and a dot image of the gravure cell is formed by using the laser drawing machine 32. Of a plurality of types of pixel values Pi corresponding to the size of the sand grain image when the pixel array in the data memory space 25 is two-dimensional, which is optimum for drawing
The arrangement procedure of is shown.

First, as shown in FIG. 9A, in the data memory space 25, a two-dimensional pixel array area having the numbers of pixels x and y is formed, and the gravure cell of the gravure printing plate illustrated in FIG. 4 is formed. The pixels to which the symbols “1” to “n” are assigned are arranged two-dimensionally in the order of the symbols to correspond to the array of No. All pixels are initialized with the initial value (0). For convenience of explanation, here, a two-dimensional pixel array region having a total of 20 pixels is set, with the X direction having 5 pixels and the Y direction having 4 pixels.

Then, as shown in Table 3, the X direction,
Arrangement numbers NiX, NiY, arrangement intervals piX, piY, displacement magnifications ViX, Vi set individually in the Y direction.
Based on Y and the random number value RND obtained by the random number generating function provided in the grain pattern data creating device 20, three types of pixel values Pi (A, B, C) corresponding to the size of the sand grain image are calculated. 9
As shown in (b), FIG. 9 (c), and FIG. 10 (a),
The two-dimensional pixel array areas are arranged uniformly and randomly at predetermined pixel positions.

Here, i in the two-dimensional pixel array area
The arrangement position of the j-th pixel in the X direction and the k-th pixel in the Y direction of the pixel value Pi of the type is Pi (x, y) = (j × arrangement interval piX + displacement magnification ViX × (RND-0. 5), k × arrangement interval piY + displacement magnification ViY × (RND-0.5).

FIG. 9B exemplifies a state in which four pixel values “A” are arranged by the above equation, but one of them is overlapped with another pixel value “A” position, and 3 There seems to be only one.

In addition, in the same figure (c), the pixel value "B" is further added.
In the figure, the symbol "1" is shown.
The pixel value “A” at the pixel position “4” is replaced with the pixel value “B” that is arranged later.

Furthermore, when four pixel values “C” are arranged,
As shown in FIG. 10A, the sand particles in which the pixel values “A”, “B”, and “C” corresponding to the three kinds of sand particle images of different sizes are arranged uniformly and randomly Pixel data is obtained.

The method of arranging the individual pixel values in the two-dimensional pixel array area may be the method described in the specification of Japanese Patent Application Laid-Open No. 5-88332.

(Step 4) Next, in step 4,
With respect to the sand grain pixel data created in the step 3, in order to prevent the occurrence of pattern streaks and uneven streaks of the sand grain pattern, the sand grain pattern data creating apparatus of FIG. 2 is arranged so that the sand grain pixels of the sand grain pixel data are not adjacent to each other. 20 adjacent pixel removing units 2
At 3, the adjoining sand grain pixels are removed, and the grain pattern data in which all the sand grain pixels are arranged independently are created.

In step 4, first, the pixel array of the data memory space 25 constituting the sand grain pixel data is divided into an odd number column and an even number column, and the pixel columns are shifted by half a pixel to produce a gravure printing plate. Arrange according to the arrangement state of the gravure cell at that time.

Next, for all the sand grain pixels of the sand grain pixel data, all the pixel values of at least 6 adjacent pixels are returned to the initial values to isolate all the gravure cells corresponding to the sand grain image, and the 1 gravure cell becomes 1 Create grain pattern data corresponding to the sand grain image.

That is, when the pixel array when the sand grain pixel data is created is two-dimensional, the x pixel row in the X direction or the y pixel row in the Y direction is divided into an odd row and an even row. Then, the sand grain pixel data is rearranged so that each pixel column is shifted by half a pixel in the X direction or the Y direction, that is, the arrangement state of the gravure cells in the actual gravure printing plate.

In that state, if the pixel values adjacent to the sand particle pixels, which are arranged by evenly and randomly distributing the pixel values Pi corresponding to the sand particle images of a plurality of sizes, are other sand particle pixels, Since this may cause a pattern or streaks, for example, as shown in FIG. 10B, the pixel rows arranged in the X direction are divided into odd rows and even rows, and each pixel row is divided into half pixels. The pixel rows are arranged in the arrangement state of the gravure cells of the gravure printing plate as shown in FIG.

Further, the pixel values of 6 pixels respectively adjacent to the pixel values "A", "B", and "C" are shown in FIG. 9A, for example.
All of the pixel values “B” (reference numeral “b” in the figure) of pixel numbers 5 and 6 and the pixel value “C” (reference numeral “c” in the figure) of pixel numbers 8 and 17 shown in FIG. Fig. 10
As shown in (c), the grain pattern data in which all the sand grain pixels are arranged independently is obtained.

By the way, the pixel rows are divided into odd-numbered rows and even-numbered rows, and the pixel rows are arranged so as to be separated from each other by half a pixel. Of the seam pattern pattern of
This is because it can be expressed smoothly.

(Step 5) Next, in Step 5, in order to produce the gravure printing plate 40 by the gravure printing apparatus 30, the grain pattern data created in Step 4 is adapted to the model of the gravure printing apparatus 30. Perform processing to convert to the platemaking data.

This process is a process performed by the plate-making data creating section 24 of the grain pattern data creating apparatus 20 of FIG.

In step 5, the pixel values Pi corresponding to the sand grain images of a plurality of sizes obtained in step 4 are arranged uniformly and randomly, and all the sand grain pixels are arranged in isolation. Grain pattern data is converted into plate making data suitable for the model of the gravure plate making device 31 such as the gravure engraving machine 31 or the laser drawing machine 32. However, the plate making data is converted by the gravure plate making device manufacturer and model. Since the data formats are different, the method of converting the grain pattern data into the plate-making data will be described for a typical model.

As described above, the gravure plate making apparatus 30 suitable for making the gravure printing plate 40 is the gravure engraving machine 3 for directly engraving gravure cells on the gravure cylinder.
1 and a gravure cylinder 30 having a photoresist coated on its surface in advance, there are gravure plate making devices 30 having different functions such as a laser drawing machine 32 for exposing and drawing a dot image with a laser beam. Corresponding to the model of the gravure plate making apparatus 30 for producing the printing plate 40, the plate making data creation unit 24 converts the plate making data for the gravure engraving machine or the laser drawing machine.

In the first embodiment, the engraving data of the gravure cell when the gravure engraving machine 31 is used as the gravure printing plate apparatus has been described. Therefore, as the second embodiment, the laser drawing machine 32 is used here. A method for creating gravure cell drawing data when using is described.

To create the gravure cell drawing data of the laser drawing machine 32, first, in the dot image area formed by the number of dot pixels X × Y corresponding to the plate surface size of the gravure printing plate, the above-mentioned grain Pixel value Pi of the sand grain pixel in the two-dimensional pixel array area of the array pixel number x × y which constitutes the pattern data and the production condition 10 of the grain pattern printed matter.
Then, based on the separately set shape Tp of the sand grain image, dot image data of gravure cells having a plurality of sizes and corresponding to the sand grain image of a predetermined shape is generated.

Next, the dot image data generated in the dot image area of the number of dot pixels X and Y is run with the drawing direction of the laser drawing machine 32, that is, the circumferential direction (X) of the gravure printing plate as the main scanning direction. The data is converted into length format gravure cell drawing data to obtain plate making data for the laser drawing machine 32.

The dot image data of the gravure cells to be generated in the XY dot image area based on the pixel value Pi of the sand grain pixel and the shape Tp of the sand grain image is set in advance in the production condition 10 of the grain pattern printed matter. The maximum dot size Rx × Ry of the gravure cell is set to 100%, and the dot image of the gravure cell having a size proportional to the maximum pixel value Pi is set to Q.
It is generated at the positions of x and Qy.

That is, the pixel value Pi of the sand grain pixel generated in the pixel array area of the pixel numbers x and y is set to the maximum dot size R of the gravure cell in the dot image area of the pixel numbers X and Y.
The pixel of the sand grain pixel when the dot image of the gravure cell of the shape Tp, which is reduced by the area ratio in which x × Ry is 100% of the total number of dot pixels, is generated, and the pixel image is arranged in the pixel array region of the pixel numbers x and y. Based on the position (x, y), x × the minimum dot interval Qx of the dot image area with the pixel numbers X and Y,
The dot image of the gravure cell is arranged at a dot pixel arrangement position of y × minimum dot interval Qy.

Regarding the plate making data creation of the laser drawing machine 32, the steps of converting the grain pattern data of FIG. 10 (c) into the gravure cell drawing data of the laser drawing machine 32 will be described with reference to FIGS. This will be described in more detail with reference to FIG.

FIG. 11 shows a laser drawing machine 32
It is a schematic diagram of a dot image when drawing a sand grain image which is a unit of a grain pattern with fine dots.

In the figure, reference numerals "A", "B", "C"
The dot images marked with correspond to the pixel values “A”, “B”, and “C” of the sand grain images of different sizes, for example, 16 (4 × 4) dots, 25 (5 × 5) dots, 49
A rectangular gravure cell formed by (7 × 7) dots is shown, and the dot image with the code “C” is
The maximum number of dot pixels Rx and Ry of the gravure cell is shown.

The dot image of the sand grain image shown in FIG. 11 has gaps between the dots for convenience of explanation, but in the actual dot image drawn by the laser drawing machine 32, the dots partially overlap each other. , Form a sand grain image with no gaps.

Note that the dots are arranged in a grid pattern in the figure, but there are models that form dot images in a zigzag grid pattern with a half pixel shift for each dot row.

Further, the 6 × 6 dot image with the symbol “P” in FIG. 11 corresponds to the size of the gravure printing plate when the pattern drawing of the sand is drawn on the gravure cylinder by the laser drawing machine 32. The dot image array area corresponding to the minimum dot interval when arranging the dot images of the gravure cells corresponding to the pixel value Pi in the two-dimensional dot image area configured by the dot pixel numbers X and Y Then, 6-dot intervals were set in both the X and Y directions.

That is, based on the pixel values "A", "B", "C" of the grain pattern data shown in FIG. 10 (c),
The dot image shown in FIG.
It shows the minimum dot intervals Qx and Qy of the sand grain image in the two-dimensional dot image area composed of the number of dot pixels X and Y when creating the gravure cell drawing data of 2.

FIG. 12 shows the number of pixels (x = 5, y = 4).
Dots in the circumferential direction (X) based on the pixel values “A”, “B”, “C” of the sand grain pixels of the grain pattern data created in the two-dimensional pixel array region and the shape condition of the sand grain image. Number of pixels X
In a dot image area in which (circumferential length L × drawing density dx) is 30 dots and the number of dot pixels Y in the print width direction (Y) (printing width W × drawing density dy) is 24 dots, a sand particle image of rectangle S is formed. It is a schematic diagram showing the state which produced | generated the dot image of the corresponding gravure cell.

Reference numerals "1" to "2" shown in FIG. 9 (a).
The pixel array with "0" is the number of dot pixels 3 shown in FIG.
In the dot image area of 0 (X) and the number of dot pixels of 24 (Y), a dot image array area is formed at intervals of 6 dots in the X direction and the Y direction.
“5” and “11” to “15” and even columns “6” to “1”
It is divided into dot image arrangement areas of "0" and "16" to "20".

Further, the odd-numbered and even-numbered dot image array regions are arranged so as to be offset from each other by three dot pixel columns in the X direction, and, for example, to the right of the dot image arrays with reference numerals “10” and “20”. Half of the 3-dot pixel rows are located to the left of the dot image array areas of reference numerals “6” and “16”, respectively, and the odd-numbered rows and the even-numbered rows are shifted by half a pixel from each other.

When the dot images of three types of gravure cells of different sizes shown in FIG. 11 are arranged in the XY dot image area as shown in FIG. 12 based on the pixel value Pi of the grain pattern data, For example, a dot image having a pixel value “A” composed of 4 × 4 dots is arranged in a dot image array area having a code “2” and a code “12”, and a pixel value composed of 5 × 5 dots. The dot image of “B” is added to the dot image array area assigned with the reference symbols “10” and “14”, and the dot image corresponding to the pixel value “C” composed of 7 × 7 dots is assigned with the reference number “4”. Is generated centering on the dot image array area with the symbol "20".

In this embodiment, the dot image corresponding to the pixel value "B" of the pixel to which the symbol "10" is added in FIG. 9 is the dot image array area "6" in the XY dot image area in FIG. It is generated by dividing it partly to the left of.

Further, the size of the dot image corresponding to the gravure cell is the minimum dot spacing Qx, Q of the gravure cell.
In the case of a dot image larger than y (here, 6 × 6 dots), for example, a 7 × 7 dot dot image corresponding to a pixel value “C” is surrounded by a dot image array area with a reference numeral “4”. Are generated so as to extend into the dot image array areas of reference numerals “5”, “8”, and “9”. Similarly, the code "2
The dot image corresponding to the pixel value "C" of the pixel to which "0" is added is dispersedly generated in the dot image array area to which the reference numerals "1", "5", and "16" are added.

As shown in the above example, the number of dot pixels X
The dot image of the gravure cell generated in the dot image area composed of (30) and Y (24) is in the circumferential direction (X) of the gravure printing plate and also in the printing width direction (Y). Also, by connecting the same dot images as in FIG. 12, it is possible to seamlessly generate a pattern pattern having a larger grain.

That is, it is not necessary to directly generate the pattern pattern of the grain corresponding to the plate surface dimensions (circumferential length L, printing width W) of the gravure printing plate 40, and it is 1/2 in the circumferential direction (X). ,
1/3, 1/4, ... Or 1 / in the print width direction (Y)
Generating a dot image of a grain pattern with dimensions of 2, 1/3, 1/4, ... And repeatedly duplicating and enlarging the same dot image at the time of creating the plate making data of the laser drawing machine 32. This makes it possible to generate dot image data that matches the dimensions of the gravure printing plate.

In FIG. 13, the dot image data corresponding to the pattern pattern of the sand shown in FIG.
3 schematically shows the run-length format gravure cell drawing data converted into the plate making data.

In the figure, "1" added in the Y direction ...
The symbol "y" represents a data string in the print width direction (Y),
The code “1” is from “1” to “5”, and the code “2” is from “6” to
It is shown for convenience that the numeral "10", the numeral "3", and the numeral "y" are "11" to "15" and "16" to "20" in the dot image arrangement area. In each data string, the code “:” indicates the “start” of the run length format data, and the code “/” indicates the “end” of the dot string.
Further, the symbol “#” schematically represents the “end” of the gravure cell drawing data.

In the figure, the list of numbers represents the dot configuration for each dot array arranged in the X direction, and the underlined number " 1 " is the number of drawing dots for which the next data is "black". And the underlined number " 0 "
Indicates that the next data is the number of “white” non-drawing dots.

For example, 1: 1 5 0 1 1 4 0 8 1 7 0 2 1
3 / is the run length of the 30 dot rows of the first row in the X direction, which are assigned the symbols “1” to “30” in the dot image array area of “1” to “5” in FIG. 12. The first " 1 5" has 5 drawing dots (black), the next " 0 1" has 1 non-drawing dot (white), and " 1 4"
Represents the color of dots and the number of dots in a batch, such as 4 drawing dots (black), and compresses the capacity of the dot drawing data to reduce the data transfer time of platemaking data. Shortening and bloat of data memory space are eliminated.

(Step 6) Next, in step 6,
In step 5, the grain pattern data is gravure engraving machine 3
The gravure cell engraving data No. 1 or the gravure cell drawing data of the laser drawing machine 32 are input to the predetermined gravure plate making apparatus 30 and the gravure printing data is obtained based on the plate making data. Plate making device 30
Then, a gravure cell corresponding to the sand grain image is formed in the gravure cylinder, and the gravure printing plate 40 for printing the pattern pattern of the grain is manufactured.

This step is performed by the gravure engraving machine 31 of the gravure printing plate apparatus 30 shown in FIG.
And the process performed by the gravure corrosive machine 33.

Here, when the gravure printing apparatus 30 is the laser drawing machine 32, the gravure cell drawing data obtained by compressing the dot image data into the run length format by the above-mentioned method is input to the laser drawing machine 32, and the grain is drawn. The dot image of the gravure cell corresponding to the pattern pattern is drawn on the photoresist film of the gravure cylinder, and after development processing, the gravure cell unit is corroded by the gravure corrosion machine 33, and the gravure printing plate for the grain pattern printing To produce.

Next, regarding the dot images of the gravure cells corresponding to the sand grain images of various sizes as shown in FIG. 11, the laser drawing machine 32 of the gravure plate making device 30 was used to form the gravure cylinders coated with the photoresist. A specific dot drawing density dx of the laser drawing machine 32 at the time of drawing,
dy, the dot image area of the number of dot pixels X and Y corresponding to the plate surface size (circumferential length L, printing width W) of the gravure printing plate, and the maximum dot size Rx of the gravure cell corresponding to the maximum size of the sand grain image, Corresponds to the size of the sand grain image that is evenly and randomly arranged in Ry, the minimum dot intervals Qx and Qy of the gravure cell, and the two-dimensional pixel array area of the number of pixels x and y set in the data memory space 25. The relationship between the pixel value Pi to be performed and the size of the dot image corresponding to the generated sand grain image will be described with an example.

For example, the dot drawing densities dx and dy of the laser drawing machine 32 are the circumferential direction (X) and the printing width direction (Y).
When both are 100 dots / mm, rectangular sand grain images “A”, “B” composed of the number of dot pixels shown in FIG.
The size of “C” is 40 × 40 μm (4 × 4
Dot), 50 × 50 μm (5 × 5 dot), 70 × 7
It becomes 0 μm (7 × 7 dots).

The pixel values "A", "B", and "C" corresponding to the size of the sand grain image set at this time are "84", "130", and "255", respectively, and The maximum dot size R of the gravure cell with respect to the maximum possible value 255 of the value Pi (assuming 8-bit data)
Since x and Ry are each 7 × 7 dots, the maximum dot size of the gravure cell is 70 × 70 μm, and the minimum dot spacing Qx, Qy of the gravure cell is 6 × 6 dots, that is, 60 × 60 μm. Become.

The pixel value "A" in the above setting example,
The area ratio of the gravure cell to “B” and “C” is 33% and 51% with respect to the maximum dot size Rx × Ry, respectively.
% And 100%.

Next, in step 6, data for gravure cell drawing by a dot image corresponding to the pattern pattern of the sand compressed in the above-mentioned run length format, or for engraving gravure cells duplicated and expanded into four pixels. Based on the data, the gravure printing plate 30 is used to produce a gravure printing plate for printing a grain pattern.

As described above, when the gravure printing apparatus 30 is the laser drawing machine 32, the drawing control device of the laser drawing machine 32 reconverts the gravure cell drawing data compressed and input in the run length format. One or more laser beams that restore the dot image data and move and scan the gravure cylinder whose surface is coated with a photoresist film in the printing width direction (Y) while rotating in the circumferential direction (X). The light output is intermittently generated based on the dot image signal converted from the dot image data, and the dot image of the gravure cell having the pattern of the grain pattern is exposed and drawn on the photoresist film.

At this time, when the photoresist film is a photo-melting type, a positive image having a grain pattern is exposed and drawn, and when the photoresist film is a photo-curing type, a negative image is exposed and drawn.

Next, the exposed and drawn latent image of the grain pattern of the photoresist film is developed to remove the photoresist film of the gravure cell portion corresponding to the sand grain image, and then the gravure corrosive machine 33 is used to remove the gravure cell portion. Is corroded to obtain a gravure printing plate 40 for printing a grain pattern.

(Step 7) Next, in Step 7,
Print the grain pattern. This printing is performed using the gravure printing machine shown in FIG.

In step 6 described above, the gravure engraving machine 31, or the gravure plate making apparatus 30 such as the laser drawing machine 32, the gravure corrosion machine 33, etc. corresponds to the grain pattern on the surface of the gravure cylinder by engraving or corrosion. The gravure printing plate 40 on which gravure cells are formed is attached to a printing unit of a gravure printing machine, and a design pattern of sand is printed on a printing material web 50 for building materials such as decorative paper to obtain the grain design print of the present invention. obtain.

The gravure cell corresponding to the sand grain image which is the unit of the grain pattern shown in FIGS. 11 and 12 is
Theoretically, all of them are arranged independently, but when a gravure printing plate is actually manufactured and a grain pattern pattern is printed, a sand grain image (40 × 40 μm) having the smallest size causes blurring. Easy and at the minimum spacing of randomly arranged gravure cells (here 10 μm / 1 dot)
Then, the grain-by-grain unit images were spliced together, and the grain pattern as originally designed was not obtained.

Therefore, the pixel values "A", "B",
The maximum dot size R of the gravure cell remains the same as "C"
x × Ry is 14 × 14 dots, and the minimum dot interval Qx
× Qy is 12 × 12 dots, and the size of the gravure cell corresponding to the sand grain image is 80 × 80 μm (8
(× 8 dots), 100 × 100 μm (10 × 10 dots), and 140 × 140 μm (14 × 14 dots) gravure printing plates were produced, and when a pattern pattern of sand grains was printed, the sand grain image had no blur. In addition, a clear and stable grain pattern printed matter was obtained without the sand grain images being spliced at the minimum interval (20 μm / 2 dots).

On the other hand, the maximum dot size Rx of the gravure cell
× Ry is 5 × 5 dots, minimum dot spacing Qx × Qy is 4
× 4 dots, and the size of the gravure cell corresponding to the sand grain image is 30 × 30 μm (3 × 3 dots), 4
0 × 40 μm (4 × 4 dots), 50 × 50 μm (5 ×
When a gravure printing plate having 5 dots) was produced and printed, the sand grain images were often faint and the seams between the sand grain images were large, which was unsuitable as a fine grain pattern.

As for the corrosion depth of the gravure cell corresponding to the sand grain image, a gravure printing plate was produced and printed, and the quality of the resulting grain pattern print was evaluated.
The corrosion depth of the gravure cell, which is most suitable for the grain pattern, varies depending on the area of the gravure cell.
Within the range of 1 mm, there was no blur of the sand grain image and no occurrence of splicing, which was good.

From the above results, the area of the gravure cell corresponding to the sand grain image is a certain value or more, and in the present embodiment, 0.00
If it is not 5 mm ² or more, the sand grain image is noticeable, and the maximum dot size Rx × Ry is set to the minimum dot interval of 1.x with respect to the minimum dot interval Qx × Qy of the gravure cell.
It was proved that the sand grain images were prevented from being spliced with each other by making the amount less than 5 times, and pattern streaking and streak unevenness did not occur.

Further, a very fine sand grain image of several tens to several hundreds of μm, which is called a fine grain pattern, particularly a fine grain pattern,
When arranging the spaces as close as possible, and further obtaining a grain pattern without stiffening or streaking, there is an upper limit of the size of the gravure cell corresponding to the sand grain image, and if a gravure cell exceeding 1 mm ² is formed, Density unevenness occurs around and in the center of the printed grain image, and the sharpness of the grain pattern is lost.

Unlike a laser drawing machine, a gravure engraving machine cannot mechanically form such a large sand grain image with one gravure cell, and normally a large number of gravure cells are used to form a large sand grain. Forming an image,
Since it is not the gist of the present invention, its explanation is omitted.

On the other hand, the limit at which a person having normal visual acuity can discriminate the difference in the size of the sand grain image, which is a unit of the grain pattern, with the naked eye is about 50 to 100 μm. When combining the types to form a grain pattern, the area of the gravure cell corresponding to the sand grain image is 0.00
When the range of 5 mm ² ~ 1 mm ^2, the size type of identifiable sand images is limited to about 10 kinds, even if the area of the sand image mix more than 10 kinds, as the handle pattern grained It was difficult to recognize the difference in the designability with the same pattern design as that of the following types.

Therefore, in the present invention, the size of the sand grain image forming the grain pattern, that is, the area of the sand grain image which is the unit of the grain pattern is limited, and the number of types of sand grain images having different areas is also limited. In this case, the design property as a grain-patterned printed material was further improved, and more preferable results were obtained in various printing stocks for building materials and printing characteristics of printing inks.

[0293]

[Examples] Next, regarding a pattern of a sand grain by a one-dimensional array of sand grain pixel data in a method for producing a grain pattern printed product of the present invention, an example in which a gravure printing plate is produced by a commercially available gravure engraving machine Will be described.

Gravure engraving machine 31 used in this example
Is the circumference length L of the gravure cylinder is 250-2200m
m, maximum printing width W is 3500 mm, density is 40 to 100
Has engraving performance of line / cm gravure cell,
The engraving shift of the gravure cells in the odd and even rows in the circumferential direction (X) is 1/2, and the engraving pattern in the circumferential direction (X) or the printing width direction (Y) is repeated up to 15 times each. Has the function of engraving.

The shape of the engraved gravure cell is
You can select a regular rhombus called "Normal" with almost the same vertical and horizontal diagonal lengths, a vertical rhombus called "Eron Gate", and a horizontally long rhombus called "Compressed". Can be set separately in the circumferential direction (X) and the printing width direction (Y).

The gravure cell engraving data of the gravure engraving machine 31 is set so that the number of pixels of the gravure cell in the circumferential direction (X) is an odd number from that in an even number column in order to eliminate the occurrence of seams of pictures in the circumferential direction. The number of columns is increased by 1 pixel so that a seamless grain pattern printed matter can be obtained. Further, the number of pixels of engraving data corresponding to 1 gravure cell is 4 pixels, and the print width direction ( In the format of (Y), the number of columns of gravure cells is an even number.

[0297] Further, the grain pattern data creating device 20 for creating the data on the grain pattern pattern used in this embodiment is
The data memory space 25 for arranging the pixel values of the sand grain image, which is a unit of the grain pattern, is a device having the same function as the grain pattern plate making system disclosed in JP-A-5-88332.
It has a storage capacity of 16 megabytes composed of 4000 × 4000 pixels, and is further provided with a magnetic tape used for exchanging plate-making data with the gravure plate making apparatus 30, and an auxiliary storage device for a magneto-optical disk.

Furthermore, in order to display the grain pattern generated in the data memory space 25 of the grain pattern data creating device 20, the resolution is about 3 dots / mm, and the horizontal 1920 pixels × vertical 1035 pixels are provided. It is provided with a 29-inch high-definition color display device 28 and a display image memory of about 6 megabytes for displaying a pattern pattern of a grain on the display device 28.

[0299] In addition, for the simple color printing of the grain pattern pattern generated in the data memory space 25 of the grain pattern data creating device 20 on A4 or B4 size paper at a resolution of 8 dots / mm. A sublimation heat transfer type or ink jet type color printing device 29 is provided, and the display device is provided before printing various grain patterns generated by the grain pattern data creating device 20 with a gravure printer. The pattern pattern of the grain can be compared and calibrated by displaying on the display 28 or by simple printing with the printing device 29.

It should be noted that the color of the sand grain image and the background color, which are displayed or printed on the color display device 28 or the color printing device 29, are colored in advance according to the color of the printing ink or the printing material. The pattern data creating device 20 also has a function of designating each color.

For example, since the initial value (0) constitutes the background color, the density of the gray color to be displayed or simply printed is changed to white, the sand grain image to gray, and the size of the sand grain image. When doing so, the large sand grain image is colored in dark gray, and the small sand grain image is colored in light gray.

A grain pattern data creating apparatus 20 having the above structure,
Using a gravure engraving machine 31 for directly engraving a gravure cell on a gravure cylinder, a gravure printing plate 40 for printing a grain pattern pattern was produced under the following grain pattern production conditions. In the present embodiment, the grain pattern image, which is a unit of the grain pattern, has two sizes, large and small, to obtain the grain pattern pattern.

[0303]

Gravure printing plate dimensions: Circumferential length L = 300 mm Printing width W = 930 mm Gravure cell engraving density: Circumferential direction Dx = 7.5 cells / mm Printing width direction Dy = 15 lines / mm

Gravure cell array Pixel number: circumferential direction x = 2250 cells (however, odd number columns are 2251 cells) Printing width direction y = 13950 lines Total number of pixels n = 31394475 pixels However, total number of pixels n = X direction 2250 × Y direction 13950
+ Y direction 13950/2 Pixel array: One-dimensional, initial value (0) Isolation condition: Removal of adjacent 8 neighboring pixels

When one pixel is expressed by 1 byte (8 bits) in the total number of pixels n, the data memory required for the total number of pixels n becomes a large capacity of about 30 megabytes. In consideration of the calculation processing time in the creating apparatus 20, this time, a pattern pattern of a grain having a size of ⅕ of the print width W is generated, the print width direction (Y) is set to 2790 lines, and the X direction is set. 2250 x Y direction 2790 + Y direction 2
790/2 = 6278895 pixels (about 6 megabytes)
Is generated in the one-dimensionally arranged pixel array area to create plate making data for the gravure engraving machine. Therefore, the number of arranged Ni in the sand grain image was also reduced to 1/5 of the above.

First, the production condition 10 is input to the grain pattern data creating apparatus 20, and 2250 pixels in the circumferential direction (X) (2251 pixels in the odd number column) and 2790 in the printing width direction (Y).
A data memory space 25 of 6278895 pixels (about 6 megabytes), which corresponds to the number of pixels, is arranged one-dimensionally as shown in FIG. 5 and initialized with an initial value (0).

Next, two kinds of pixel values Pi (P1, P2) corresponding to the area of the sand grain image which is the unit of the grain pattern are set to the number of sand grain image arrangements Ni (N1, N2) and the arrangement interval pi (p1, p
2) Based on the displacement magnifications Vi (V1, V2), the particles were arranged uniformly and randomly, and the sand grain pixel data was obtained.

In this sand grain pixel data, when a large number of sand grain images are set, the number of places where the sand grain images are adjacent to each other increases. Therefore, when the sand grain pattern pattern is printed, the adjacent sand grain images are Appearing to be continuous, a grain pattern larger than the desired pixel (which can no longer be said to be a grain pattern) is generated, which causes streaks and patterns.

Therefore, in order to set the position of the sand grain pixel, the pixel array once arranged in one dimension is composed of the circumferential direction (X) and the printing width direction (Y) which are the pixel array in the gravure engraving machine. The pixels are rearranged in a two-dimensional pixel array and the adjacent pixel is removed.

To remove adjacent pixels, first, when rearranging into a two-dimensional pixel array, the pixel rows in the circumferential direction (X) are
As shown in FIGS. 3 and 6, the odd-numbered columns and the even-numbered columns are arranged so as to be shifted by half a pixel so as to be equivalent to when engraved by the gravure engraving machine.

Therefore, the odd-numbered column 2251 pixels and the even-numbered column 2
The 250 pixels are shifted from each other by a half pixel to form the gravure cell array state of the gravure printing plate, and in this state,
As shown in FIG. 6, in the order of the pixels with the symbols “1” to “n”, the six pixels with the symbol “x” adjacent to the sand grain pixel with the pixel value P1 = 255 and P2 = 128 are arranged. , A total of 8 pixels of 2 pixels to which the symbol “*” is added are sequentially returned to the initial value (0), and grain pattern data in which all the sand grain pixels are arranged independently are obtained.

Further, the above-mentioned grain pattern data was displayed on the color display device 28 of 3 dots / mm vertically and horizontally on a monitor and compared with the original design plan. At that time, based on the pixel values (0 to 255) of the grain pattern data, the display image data of the sand grain images having different sizes are generated on the display image memory of the grain pattern data creating device 20.

Here, when the pixel value Pi is "255", a diamond-shaped dot image having a diagonal line length of 24 dots in both the X and Y directions is used, and when the pixel value Pi is "128", the diagonal line length is 17 dots. Generated a dot image of a diamond.

That is, a dot image is generated so that the pixel value of the grain pattern data corresponds to the area of the dot image of the grain image, and the color display device 28 is operated according to the position of the grain pixel of the grain pattern data. In the image memory of, the dot images in the X direction are 24 dots apart, in the Y direction are 12 dots apart, and the dot images in the odd and even columns in the X direction are shifted by 12 dots from each other, and the display image data is created. did.

Then, the dot image of the diamond-shaped sand grain image and its background are respectively colored in a predetermined color, and the pattern pattern of the grained sand which has been enlarged to about 60 times and colored is displayed in color. It was displayed on the device 28 and compared with the design proposal.

The arrangement direction of the grain pattern data (generally, the gravure plate making apparatus uses the vertical circumferential direction (X) as the main scanning direction) and the display image data generated on the display image memory. When the arrangement direction (the display device 28 normally refers to the horizontal direction as the X direction is the main scanning direction) is different from the arrangement direction when the pattern pattern of the sand based on the sand grain pixel data is displayed on the display device 28. And the Y-direction dot pixel array direction is converted and displayed.

When the color printing device 29 prints the pattern pattern of the sand for the simple proof, the display image data generated on the display image memory is converted into the print image data as it is, and the color image is printed. As in the case of inputting to the printing device 29 for printing or displaying on the display device 28, first, based on the pixel value of the sand grain pixel of the grain pattern data, a regular rhombus dot image is generated, Next, the resolution (8 dots / mm) of the color printing device 29 and the gravure cell array density (Dx = 7.5 cells / m) of the gravure engraving machine 31.
m, Dy = 15 lines / mm)
A dot image for printing is generated, and image data for printing colored with a designated color is further created and input to the color printing device 29 to print a pattern pattern of sand for simple calibration.

Here, the display image data can be directly converted into the printing image data to obtain a hard copy of the pattern pattern of the sand for the simple calibration magnified about 23 times. After confirming the pattern, the grain pattern data is converted into plate-making data suitable for the gravure cell engraving data format of the gravure engraving machine 31.

Incidentally, the gravure engraving machine 3 in this embodiment.
The number of pixels in the circumferential direction (X) required for 1 is 2251
As shown in FIG. 7, the gravure cell engraving data of this engraving machine has 4250 pixels in an even number of columns, and each pixel is duplicated and enlarged four times in the main scanning direction, here, in the circumferential direction (X), Data for gravure cell engraving with 4 pixels as one block is created to create data for plate making. In the gravure engraving machine 31, based on the data for engraving gravure cell with 4 pixels of this plate making data as 1 block. Engrave a gravure cell.

Therefore, the grain pattern data that is created in the data memory space 25 of the grain pattern data creating apparatus 20 and becomes the pattern pattern of the grain is matched with the format of the engraving data of the gravure engraving machine 31 and the gravure is applied. Approximately 30 megabytes of engraving data (however, the amount of data is ⅕ of the print width W) that is duplicated and expanded by 4 pixels in the main scanning direction of the cell engraving is created, and is once written on a magnetic tape or a magneto-optical disk. I remembered.

Next, this magnetic tape or magneto-optical disk is mounted on the data input device provided in the engraving control device of the gravure engraving machine 31, and the engraving control device is operated to operate the magnetic tape or magneto-optical disc. The engraving data is set to engrave the gravure cell by repeating the engraving data five times in the print width direction (Y), and then the engraving mechanism is controlled based on the engraving data to cause the gravure cylinder to
A gravure printing plate for printing a grain pattern pattern, which is endless in both length and width, was obtained by continuously engraving gravure cells in a spiral shape with a diamond engraving needle.

The gravure cells engraved by the gravure engraving machine 31 form inverted pyramid-shaped gravure cells having different depths and areas corresponding to the pixel values of the engraving data. In the gravure printing plate created in 31, all the gravure cells are formed in a rhombus shape as shown in FIG. 18, all the gravure cells are isolated, and the gravures of two sizes corresponding to the pixel value are provided. The cells constituted a pattern of sand grains that were evenly and randomly mixed.

By the way, in the gravure printing plate 40 produced by the gravure engraving machine 31 based on the production condition 10 of the grain pattern printed matter of the present embodiment, the gravure cells constituting the grain pattern are the grains of the grain image. Pixel value Pi corresponding to the area
(P1 = 255, P2 = 128), the rhombus diagonal lengths are 133 μm × 133 μm and 94 μm × 9, respectively.
It was 4 μm.

The engraving speed of the gravure cell of the gravure engraving machine 31 is about 5000 cells / second, and in the gravure cylinder having a circumferential length of 300 mm and a printing width of 930 mm, the gravure cell corresponding to the above-mentioned grain pattern is formed. Took less than 2 hours to sculpt.

[0326] Next, regarding the pattern of the grain of the two-dimensional array of the grain data of the grain in the method for producing the grain pattern printed material of the present invention, the pattern of the grain is formed on the photoresist film of the gravure cylinder by the laser drawing machine. A second embodiment when a pattern is drawn to manufacture a gravure printing plate for printing a grain pattern will be described.

Laser drawing machine 32 used in this example
Indicates a circumference length L = 300 to 900 mm and a print width W = 150.
It is a device that draws a dot image with a dot density of 50 to 200 dots / mm vertically and horizontally on a gravure cylinder of up to 1400 mm with a laser beam.

Since the laser drawing machine forms the sand grain image corresponding to the gravure cell with fine dots, there is no restriction on the shape and size of the gravure cell formed in the gravure cylinder as compared with the gravure engraving machine. It is also possible to form rectangular or circular gravure cells without being limited to the diamond shape, and it is also possible to perform drawing by mixing rhombic, rectangular and circular gravure cells.

The gravure cell drawing data to be input to this laser drawing machine is, for example, when a dot image is drawn on a gravure cylinder having a circumference length of 300 mm and a printing width of 930 mm with a drawing dot density of 100 dots / mm. In this case, about 333 megabytes of dot image data is required, and if the drawing dot density is further increased or the size of the gravure cylinder is increased, this dot image data of several times to several tens of times is required.

Therefore, in this laser drawing machine, the plate making data is delivered by the gravure cell drawing data obtained by compressing the dot image data in the run length format, and the gravure engraving machine is used to deliver the plate making data. Three
As in the case of No. 1, the grain pattern data creating apparatus 20 is provided with a magnetic tape and a magneto-optical disk data output apparatus 27.

Further, the grain pattern data creating apparatus 20 used in this embodiment is an apparatus having the same function as the grain pattern plate making system disclosed in Japanese Patent Laid-Open No. 5-88332, like the first embodiment. In order to logically expand the capacity of the data memory space 25, the data memory space 25 of 16 megabytes (4000 × 4000 pixels) for arranging the pixel value Pi corresponding to the size of the sand grain image is provided. It is provided with an auxiliary storage device composed of a magnetic disk.

Also, the grain pattern data creating apparatus 20 is
An image memory for visualizing and displaying image data of the grain pattern pixel data generated in the data memory space 25,
A high-definition color display device 28 and a color printing device 29 for printing an imaged grain pattern on a monitor are connected.

The grain pattern data creating apparatus 20 inputs the production conditions 10 of the grain pattern printed matter, and uses the data input device 26 such as a keyboard, mouse or tablet for controlling the operation of the grain pattern data creating apparatus. Provided, color display device 28
The color of the grain image and the background color at the time of displaying or printing the grain pattern on the color printing device 29 can be specified to the grain pattern data creating device 20, respectively.

In this embodiment, the sand grain image which is the unit of the grain pattern has two sizes, large and small, and the pattern of the grain pattern formed by forming the gravure cell corresponding to the sand grain image in a rectangular shape and a circular shape. And the laser drawing machine 3 for drawing the dot image of the gravure cell corresponding to the pattern pattern of the sand on the gravure cylinder.
Using No. 2, a gravure printing plate 40 for printing a grain pattern was produced under the following production conditions 10.

[0335]

Dimensions of gravure printing plate: circumferential length L = 300 mm printing width W = 930 mm Gravure cell drawing density: circumferential direction Dx≈8.3 cells / mm printing width direction Dy≈8.3 cells / mm

Gravure cell array Number of pixels: Circumferential direction x = 2500 pixels Printing width direction y = 7750 lines Total number of pixels: n = 193750 pixels However, total number of pixels n = 2500 pixels in X direction × 775 in Y direction
0 pixel Pixel array: Two-dimensional, initial value (0) Isolation condition: Removal of adjacent 6 neighboring pixels

Dot drawing density: Circumferential direction dx = 100 dots / mm Printing width direction dy = 100 dots / mm-Number of dot pixels: Circumferential direction X = 30000 dots Printing width direction Y = 93000 dots-Minimum gravure cell dots Interval: Qx = Qy = 12 dots ・ Maximum dot size of gravure cell: Rx = Ry = 14 dots

When one pixel is represented by one byte,
Since the data memory required for the total number of pixels n is as large as about 19 megabytes, in consideration of the calculation processing time in the grain pattern data creating apparatus 20, this time, the size is half the print width W. The pattern pattern of the grain is generated, the printing width direction (Y) is set to 3875 lines, the X direction is 2500 pixels, and the Y direction is Y pixels.
Direction 3875 pixels (total 9687500 pixels (about 9.2
(Megabyte)) was produced in a two-dimensionally arranged pixel array region to create a pattern pattern of the grain and to prepare plate making data of the laser drawing machine 32. Therefore, the arrangement number Ni of the sand grain image is also 1 /
Reduced to 2.

The above production conditions 10 are input to the grain pattern data creating apparatus 20, and first, 2500 pixels in the circumferential direction (X),
The data memory space 25 corresponding to the number of pixels of 3875 pixels in the print width direction (Y) is arranged two-dimensionally as illustrated in FIG. 9 and initialized with an initial value (0).

Next, two kinds of pixel values Pi (P1, P2) corresponding to the area of the sand grain image which is a unit of the grain pattern are set to the number of sand grain images arranged Ni (N1X and N1Y, N2X and N2Y) and the arrangement interval. pi (p1X and p1Y, p2X and p2Y), displacement magnification Vi (V1X and V
1Y, V2X and V2Y) were used to disperse the particles uniformly and randomly to obtain sand grain pixel data.

In the pattern pattern of the sand in this state, when a large number of arranged sand grain images are set, as in the first embodiment, the number of places where the sand grain images are adjacent to each other increases, and when printing is performed. Since the adjacent sand grain images appear to be continuous, a grain pattern larger than the desired sand grain image (which can no longer be said to be a grain pattern) is generated, which causes streaks and patterns.

Therefore, next, in order to arrange a plurality of types of pixel values corresponding to the size of the sand grain image, a pixel array in which the number of pixels in the X direction is 2500 pixels and the number of pixels in the Y direction is 3875 pixels is arranged two-dimensionally. 4 and FIG. 10 (b), a pixel array in which the odd-numbered columns and the even-numbered columns are shifted from each other by half a pixel in the circumferential direction (X) which is the image array in the laser drawing machine 32 Then, the adjacent pixels are removed.

As illustrated in FIG. 4, the odd number column 250
The 0 pixel and the 2500 pixel in the even-numbered column are shifted by half a pixel from each other to form the gravure cell array state of the gravure printing plate,
In this state, in order of the pixels with the reference numerals "1" to "n", 6 pixels adjacent to the sand grain pixel in which the pixel values Pi (P1 = 255, P2 = 128) are arranged are sequentially set to the initial values. It was replaced with (0) to obtain grain pattern data in which all the sand grain pixels were arranged independently.

Next, the grain pattern data was displayed on the color display device 28 as in the first embodiment and compared with the original design plan. At that time, the pixel value (1
255), the display image data of the sand grain images of different sizes are generated on the display image memory of the grain pattern data creating apparatus 20.

This time, when the pixel value Pi is "255", a rectangular dot image having a side length of 24 dots in both the X and Y directions and a substantially circular dot image having a diameter of 24 dots are displayed. Further, when the pixel value Pi is "128", the display image data having a rectangular shape with a side length of 17 dots and a substantially circular shape with a diameter of 17 dots is generated, and according to the arrangement of the sand grain pixels in the grain pattern data. The dot images of the sand grain image were generated on the image memory for the color display device 28 in an array of 20 dots in the X direction and the Y direction.

Then, the dot image for display of the rectangular or circular sand grain image and the background thereof are each colored with a predetermined color and enlarged to a size of about 57 times,
In addition, the colored grain pattern was displayed on the color display device 28 and compared with the design proposal.

As in the case of the first embodiment, the pixel arrangement direction of the grain pattern data (the gravure printing apparatus usually has the vertical circumferential direction (X) as the main scanning direction) and the display image. Since the arrangement direction of the display image data generated on the memory is different from that of the display image data (the display device 28 usually refers to the horizontal direction as the X direction), the pattern pattern of the sand based on the sand grain pixel data is displayed. When displaying on the device 28, the dot pixel array directions of the X direction and the Y direction are converted and displayed.

When the color printing device 29 prints the pattern pattern of the sand for simple calibration, the display image data generated on the display image memory is directly converted into the print image data, and the color image is printed. The data was input to the printing device 29 and printed to obtain a hard copy of a sandstone pattern pattern for simple proofreading magnified about 21 times. Next, with this grain pattern pattern, dot image data of the gravure cell corresponding to the pixel value Pi of the sand grain pixel of the grain pattern data is generated.

As shown in the above-mentioned production conditions of the grain pattern printed matter, the dot drawing density dx = dy of the laser drawing machine 32.
= 100 dots / mm, the minimum dot spacing of the gravure cell is Qx = Qy = 12 dots (120 μm), and the maximum dot size is Rx = Ry = 14 dots (140
μm).

For a pixel value P1 = 255 corresponding to the size Si of the sand grain image, 14 × 14 dots (140 ×
140 μm) rectangle and 14 dots in diameter (140 μm)
m) circular dot image, and a rectangle of 10 × 10 dots (100 × 100 μm) for pixel value P2 = 128,
And a circular dot image with a diameter of 14 dots (140 μm) was generated.

That is, the area ratio of the dot image of 14 × 14 dots (the number of dots 196) with respect to the maximum pixel value “255” of the 8-bit sand grain pixel is 100% and corresponds to other pixel values. Calculate the number of dots,
The required number of dots is obtained, and the dot image of the sand grain image is generated.

For example, when the pixel value of the sand grain pixel is “128”, the number of dots in the dot image is (128 × 196/25
5≈) 98.38, and a square dot image with a side length of 10 dots is obtained. Similarly, when the sand grain image is circular, a dot image of a circle having a diameter of 10 dots is obtained.

The number of dots in the dot image when the pixel value is “64” is (64 × 196 / 255≈) 49.19.
And the square root yields a dot image with a rectangle side length of 7 dots. Similarly, when the sand grain image is circular, a dot image of a circle having a diameter of 7 dots is obtained.

As described above, when the number of constituent dots of the dot image is obtained by the pixel value Pi corresponding to the size (area) of the sand grain image, the XY dot image area described earlier with reference to the schematic diagram of FIG. A dot image corresponding to a rectangular or circular sand grain image (gravure cell) is arranged to generate dot image data corresponding to a pattern pattern of sand.

That is, in the condition for producing a grain pattern printed matter, the circumferential direction (X) corresponding to the dot drawing density of the laser drawing machine is 30,000 dots, and the printing width direction (Y) is 93.
000/2 = 46500 dots in an XY dot image area (about 166 megabytes), in a zigzag pattern with a minimum gravure cell dot interval Qx = Qy = 12 dots corresponding to the position of the sand grain pixel in the grain pattern data. On the basis of the dot image array area of, the rectangular dot image and the circular dot image were dispersed and arranged.

Next, the dot image data corresponding to the above-mentioned grain pattern is converted into plate-making data suitable for the format of the gravure cell drawing data of the laser drawing machine 32.

For the gravure cell drawing data of the laser drawing machine, the dot image data of the dot image area is shown in FIG.
As shown in, the white pixels and the black pixels whose main scanning lines are in the circumferential direction (X) are compressed in the run length (pixel continuous length) format to be created. In this embodiment, the maximum X direction is 3000.
Black / white data with 0 dots and 16-bit length was alternately arranged and encoded to prepare plate-making data.

The plate-making data composed of the gravure cell drawing data compressed and encoded in the run-length format is temporarily transferred to the magnetic tape, by the grain pattern data creating apparatus 20.
Alternatively, after recording on a magneto-optical disk, the magnetic tape,
Alternatively, the magneto-optical disk is mounted on the drawing control device of the laser drawing machine 31.

Then, through the drawing control device of the laser drawing machine 32, the output of the laser beam is controlled while restoring the plate making data again to the dot image data,
A dot image of a sand grain image forming a pattern pattern of a grain was exposed and drawn on a photoresist film coated on a cylindrical gravure cylinder having a circumferential length of 300 mm and a printing width of 930 mm.

The plate-making data input to the drawing control device of the laser drawing machine 31 is the print width W of the gravure printing plate.
Since the amount of data is 1/2, the drawing controller is operated to repeatedly use the same dot image data twice in succession, and the gravure cylinder is instructed to draw a dot image. It was possible to draw the sand grain image with the pattern of No. 2 on the plate surface of the gravure cylinder seamlessly in an endless manner.

Next, the photoresist film in the sand grain image area drawn on the gravure cylinder is developed and peeled off, and then the copper plating layer in the sand grain image area is corroded by the gravure corrosive machine 33.
A gravure printing plate for printing a grain pattern having a gravure cell was produced.

In this embodiment, the gravure cell corresponding to the sand grain image formed on the gravure cylinder has a pixel value Pi (255, 1 set in the condition 10 for producing the grain pattern printed matter).
28), when the shape is specified as a rectangle, as shown in FIG. 19, there are two types of substantially rectangular shapes, each side having 140 μm (14 × 14 dots) and 100 μm (10 × 10 dots). The gravure cell was obtained.

Further, when the shape of the sand grain image is designated as a circle under the manufacturing condition 10, as shown in FIG. 20, substantially circular gravure cells having two kinds of diameters of 140 μm and 100 μm are formed respectively. Both the rectangular and circular gravure cells were evenly and randomly distributed on the surface of the gravure cylinder, and the gravure cells were isolated without adjoining each other.

Furthermore, the minimum distance between gravure cells is 120.
is 100 μm even in the narrowest short part between gravure cells.
Yes, in the grain pattern printed with this gravure printing plate, all the grain images are printed separately without the sand grain images being spliced together, and a grain pattern print with no pattern curl or streaks is obtained. Was given.

The examples of the grain patterns shown in FIGS. 18, 19, 20, and 21 are rectangles, circles, and rhombuses each having two types of pixel values Pi (255 and 128). The pattern is enlarged and displayed on the monitor screen of the grain pattern data creating device 20 and is hard-copied by the color printing device 29. The large sand grain image corresponding to the pixel value "255" and the pixel value " Small sand grain images corresponding to 128 "are mixed well, and the positions of the sand grain images are not partially or totally biased, and the intervals of the sand grain images are moderately dispersed and uniform. While maintaining the nature, they are randomly arranged to form a sandy pattern pattern without pattern habits or streaks.

Further, in the obtained grain pattern printed matter, the sand grain images of different sizes are dispersed and arranged by the gravure cell created corresponding to the grain image serving as the unit of the grain pattern. As a textured grained pattern, a grained printed matter having a high design property, which was unprecedented in the past, was obtained.

[0368] With the above, the production process of the grain pattern printed material of the present invention is completed. The matters not described in the above description will be described below as modified examples.

In this embodiment, a rectangular sand grain image as shown in FIGS. 11 and 12 was mainly described, but in the case of producing a gravure printing plate by using the laser drawing machine 32, as shown in FIG.
As shown in FIG. 4, in addition to the rectangle S, a rhombus R, a circle T, or any other shape suitable for a grain pattern can be used to draw a grain pattern pattern with a triangular sand grain image. It is also possible to use a graphic obtained by deforming a circular dot image in the vertical direction, the horizontal direction, or the diagonal direction as a gravure cell.

In particular, since the laser drawing machine 32 draws an image with fine dots, various shapes of the sand grain image are prepared in advance in the grain pattern data creating apparatus 20 in the form of vector image data. The size of the sand grain image can be freely changed according to the pixel value, and the dot image data of the grain pattern can be easily created.

Further, the sand grain images of various sizes are formed for each pixel value corresponding to the size of the sand grain image. For example, a flat rhombus, a rectangle, a triangle, a 6
By assigning the shape of the gravure cell such as a polygon, an ellipse, or an ellipse, it is possible to form a grain pattern in which sand grain images of various shapes are mixed.

Further, in FIG. 15, FIG. 16 and FIG. 17, three types of sand grain images having different sizes are illustrated for the sand grain images having different shapes, but when the gravure engraving machine is used, it is shown in FIG. As described above, not only the size of the sand grain image but also the depth of the gravure cell can be changed in accordance with the pixel value to form the sand grain images having different densities.

Further, FIG. 15 shows gravure cells corresponding to three types of diamond-shaped sand grain images of different sizes, which can be formed in the gravure cylinder by either the gravure engraving machine 31 or the laser drawing machine 32. However, a gravure printing plate for grain pattern printing may be produced by forming not only a regular rhombus as shown in the drawing but also a vertically or horizontally long gravure cell called "compress" or "elongate". .

Similarly, regarding the rectangular and circular sand grain images that can be mainly drawn by the laser drawing machine 32 shown in FIGS. 16 and 17, the grain is formed by a rectangular or elliptical or oval gravure cell whose aspect ratio is changed. The pattern may be generated. However, when the aspect ratio is changed extremely, the pattern pattern of the grain becomes directional, so by randomly rotating the direction of the sand grain image so that the direction is not noticeable,
It is possible to obtain a grainy pattern with high design.

Two types of shapes, rectangular and circular, were selected for the sand grain image by the laser drawing machine of the present embodiment, but only a diamond shape, a rectangle, or a circle was used to form a grain pattern. Alternatively, for example, since it is possible to configure a grain pattern in which a plurality of these shapes are combined, it is possible to create a variety of grain pattern patterns that cannot be obtained by a gravure engraving machine.

Further, since it is possible to freely set a plurality of sizes of the sand grain image, the size of the sand grain image suitable for the characteristics such as the surface roughness of the printing stock and the viscosity characteristic of the printing ink can be set. , It is possible to adjust appropriately by adding print fading and print bleeding.

The shape of the sand grain image to be drawn is also rectangular, circular,
Various types such as rhombus can be used. Furthermore, the grain pattern data creating apparatus 20 is provided with a large number of basic sand grain image patterns of a star shape or a triangle whose shape is set in advance, so that highly designed sand according to the customer's request can be obtained. The pattern of the eyes can be obtained.

In the above-described embodiment, the grain pattern data creating device 20 converts the grain pattern data into plate-making data for the gravure plate making device, and the gravure printing plate 40 is once produced, and the gravure printing plate 40 is produced. The plate 40 was used to print a grain pattern pattern on a printing material 50 for building materials to produce a grain pattern printed material of the present invention. As shown in FIG. 2, an inkjet printer or an electrophotographic method is used. By using a grain pattern printing device 60 such as a laser beam printer or an ion printer that can print a dot image without using a printing plate, the grain pattern data created by the grain pattern data creating device 20 can be directly used to print a book. The grain pattern printed material of the invention can also be produced.

In this case, the grain pattern data created by the grain pattern data creating device 20 is converted into dot image data in the same manner as the gravure cell drawing data of the laser drawing machine and the grain pattern printing device 60. Or if the printing device 60 itself has a dot generator for converting a plurality of types of pixel values of the grain pattern data into dot images of sand grain images of different sizes, the grain pattern It is also possible to directly input the data to the grain pattern printing device 60 to print the grain pattern pattern.

On the other hand, in the above-mentioned embodiment, the pattern pattern of the grain of sand composed of a plurality of types of sand grain images of different sizes,
I printed with one gravure printing plate, but using multiple gravure printing plates with multiple types of sand grain images of different sizes
It is possible to produce a grain-patterned printed matter having a higher design by printing different colors of printing inks and performing multicolor printing.

In that case, the grain pattern data which has undergone the adjacent pixel removal processing is less than or equal to the total number of types of pixel values arranged based on a plurality of types of pixel values corresponding to sand grain images of different sizes. Of a plurality of gravel pattern data, and after converting each of the separated grain pattern data into plate making data, a plurality of gravure printing plates corresponding to the respective grain pattern data are produced, A grain pattern is printed using a plurality of gravure printing plates.

When the grain pattern data that has undergone the adjacent pixel removal processing is separated into a plurality of grain pattern data, for example, different grain patterns are provided for each type of pixel value, that is, for each size of the sand grain image. By creating data, or by dividing the pixel value of multiple types into several groups of the number of types or less, after separating into a plurality of grain pattern data, based on the separated grain pattern data, By producing a plurality of gravure printing plates and printing different patterns of printing inks with each other to print a grain pattern, it is possible to produce a more diverse grain pattern printed matter.

Also in the above-described method of producing a grain pattern printed matter using a plurality of gravure printing plates, since grain pattern data subjected to the adjacent pixel removal processing for removing the adjacent grain image is used, the pattern curl or stripes are used. It is easily inferred that a uniform grain pattern can be obtained.

[0384]

As described in detail above, in the grain pattern printed matter of the present invention, as shown in claim 1, a plurality of types of different areas in which a grain image as a unit of grain pattern can be visually recognized. And, since the sand grain image is all printed in isolation, it is possible to express a sand pattern with high design that is versatile and has no noticeable periodicity, and is free from streaks and patterns. It is a grain pattern printed material suitable for building materials that maintains stable quality.

The printed product of the present invention has a grain pattern according to claim 2.
As shown in, the sand grain image that is the unit of the grain pattern is 2-1
Since it is composed of 0 different areas, it is possible to express a highly patterned design pattern of sand in which at least two different kinds of sand grains are mixed.

The gravure printing plate for use in printing of the grain pattern printed product having the grain pattern pattern of the present invention,
As shown in FIG. 1, one gravure cell is formed corresponding to one sand grain image that is a unit of grain pattern, the gravure cell is composed of a plurality of different opening areas, and the gravure cells are all isolated. Since it is arranged, it is possible to print a grain pattern with a variety of colors and less periodicity and high designability at one time, and even if there is bleeding of printing ink,
It is possible to prevent the occurrence of streak unevenness that gives the impression that a large number of sand grain images, which are units of a grain pattern, are spliced, and it is possible to print a grain pattern pattern of stable quality with no pattern distortion.

Further, in the gravure printing plate of the present invention, as described in claim 4, the gravure cells formed corresponding to the sand grain image which is a unit of the grain pattern has 2 to 10 different opening areas. Since it is configured, it is possible to print a design pattern of highly-designed sand in which at least two or more kinds of different sand particles are mixed.

Furthermore, in the gravure printing plate of the present invention, as shown in claim 5, individual gravure cells formed in plural kinds of different opening areas corresponding to the sand grain image which is a unit of the grain pattern, All of them are formed within a range of substantially 0.005 to 1 mm ² , so even when the printing stock has a large surface roughness and poor smoothness, the transfer of printing ink is stable, no blur occurs, and low viscosity. Even when a high-viscosity printing ink is used, the ink adhesion is stable, the streak that gives the impression that many sand grain images are spliced together is eliminated, and it is possible to print a stable and sure pattern .

According to a sixth aspect of the present invention, in the method for producing a grain pattern printed matter, first, in the grain pattern data creating apparatus, a plurality of different types corresponding to the areas of the sand grain image limited to a plurality of types are different. Sand particle pixel data is created by arranging pixel values in a predetermined data memory space in a dispersed manner.

Then, when the sand grain pixel data is arranged in the arrangement state of the sand grain image when printing the pattern of the sand grain, the sand grain pixels given the pixel values are arranged not to be adjacent to each other. Adjacent pixel removal processing for creating grain pattern data is performed.

After that, a gravure printing plate is produced based on the grain pattern data, and the grain pattern pattern is printed.
As originally designed, it is easy to adapt to the characteristics of printing ink and printing stock, preventing unintended continuation of sand grain images, streaking of ink due to ink fading, and streak unevenness, and always stable reproduction It is possible to produce a grain-patterned printed matter with high designability, with good performance and accuracy, without increasing the number of printing plates, without increasing printing cost, and without causing the problem of defective printing registration.

Further, according to the method for producing a grain pattern printed matter of the present invention, the shape condition of the sand grain image is set in the grain pattern data creating apparatus as set forth in claim 7, and the pixel value of the sand grain pixel of the grain pattern data is set. Based on the preset shape conditions and the dot drawing density of the gravure plate making apparatus, dot image data of a sand grain image composed of a plurality of different areas having a predetermined shape is generated, and the gravure plate making apparatus Create prepress data.

After that, the plate-making data is input to the gravure printing apparatus, and the photoresist film applied to the gravure cylinder has a predetermined shape and has a grain shape composed of a plurality of types of sand grain images of different areas. Gravure printing in which multiple types of gravure cells with different opening areas are formed by exposing and drawing a dot image of a pattern pattern, then removing the photoresist film in the sand grain image area and then corroding the gravure cylinder with a gravure corrosive machine. Produce a plate.

Next, since a grain pattern pattern is printed using the gravure printing plate, a highly designed grain pattern printed matter composed of various kinds of grain images of different sizes and shapes originally designed, It can be simply and surely reproduced as designed, and the obtained grain pattern printed material can express a variety of highly designed grain patterns in which foreign grains are mixed.

According to the method for producing a grain pattern printed matter of the present invention, as described in claim 8, when the grain pattern data is converted into plate making data of the gravure plate making apparatus, it is preset in the grain pattern data creating apparatus. The shape of the selected gravure cell is selected by selecting the shape of the gravure cell corresponding to the sand particle image based on the shape condition of the sand particle image by any one of the selected rhombus, rectangle, or circle, or a combination of multiple types. And the maximum pixel value of the sand grain pixels that can be set in the data memory space of the grain pattern data creating device is an area ratio of 100%, based on a plurality of different pixel values of the sand grain pixels,
Dot image data that forms sand grain images of different areas is generated.

Next, since the dot image data is compressed into a run length format and converted into plate making data, an existing gravure plate making apparatus such as a laser drawing machine is used.
Since it is possible to produce a gravure printing plate that has a fine design and prints a fine grain pattern pattern, it is possible to easily produce a grain pattern printed matter at low cost.

According to the ninth aspect of the present invention, in the method for producing a grain pattern printed matter, the grain pattern data subjected to the adjacent pixel removal processing is used as the total of the pixel values arranged according to the pixel value. Separated into a plurality of grain pattern data of less than the number of types, to produce a plurality of gravure printing plate corresponding to each grain pattern data, using the plurality of gravure printing plate, a multi-colored grain pattern pattern By printing, it is possible to produce a variety of grain-patterned printed matter having a higher design property.

[Brief description of drawings]

FIG. 1 is a process diagram of a method for producing a grain pattern printed matter.

FIG. 2 is a block diagram of an apparatus for producing a grain pattern printed matter.

[Fig. 3] Schematic drawing of the grain pattern engraving on the gravure engraving machine

[Fig. 4] Schematic drawing of a grain pattern in a laser drawing machine

FIG. 5 is a schematic diagram of arrangement of pixel values in a one-dimensional pixel array.

FIG. 6 is an explanatory diagram of isolation of a sand grain image in a one-dimensional pixel array.

[Figure 7] Structure diagram of plate making data for gravure engraving machine

FIG. 8: Schematic diagram of engraving of gravure cell

FIG. 9 is a schematic diagram of arrangement of pixel values in a two-dimensional pixel array.

FIG. 10 is an explanatory diagram for isolating a sand grain image in a two-dimensional pixel array.

FIG. 11 is a block diagram of a sand grain image in a laser drawing machine.

FIG. 12 is an enlarged schematic diagram of a grain pattern in a laser drawing machine.

FIG. 13 is a block diagram of data for plate making of a laser drawing machine.

FIG. 14: Shape diagram of sand grain image

FIG. 15 is an enlarged view of a diamond-shaped sand grain image.

FIG. 16 is an enlarged view of a rectangular sand grain image.

FIG. 17 is an enlarged view of a circular sand grain image.

FIG. 18 is an enlarged view of a grain pattern based on a diamond-shaped sand grain image.

FIG. 19 is an enlarged view of a grain pattern with a rectangular sand grain image.

[Fig. 20] Enlarged view of a grain pattern by a circular sand grain image.

FIG. 21: Example of a grain pattern pattern of a grain pattern printed matter

[Explanation of symbols]

 10 Grain pattern printed matter manufacturing conditions 20 Grain pattern data creating device 21 Grain pattern condition setting unit 22 Pixel data creating unit 23 Grain pattern data creating unit 24 Plate making data creating unit 25 Data memory space 26 Data input device 27 data Output device 28 Display device 29 Printing device 30 Gravure printing device 31 Gravure engraving machine 32 Laser drawing machine 33 Gravure corrosion machine 40 Gravure printing plate 41 Ink pan 42 Doctor blade 43 Impression drum 50 Printing original fabric 60 Grain pattern printing device

Claims (9)

[Claims] 1. In a grain pattern printed matter on which a grain pattern pattern is printed, a grain image as a unit of grain pattern is composed of a plurality of different areas that can be visually recognized, and the grain image. However, it is a grained printed matter characterized by being printed in isolation. 2. The grain pattern printed material according to claim 1, wherein the grain image as a unit of the grain pattern is composed of 2 to 10 different areas. 3. A gravure printing plate used for printing a grain pattern printed matter on which a grain pattern pattern is printed, 1 gravure cell is formed corresponding to 1 sand grain image which is a unit of the grain pattern, A gravure printing plate, characterized in that the gravure cells are constituted by a plurality of different opening areas, and the gravure cells are all arranged in isolation. 4. The gravure cell according to claim 3, wherein the gravure cell formed corresponding to the sand grain image that is a unit of the grain pattern is 2 to 1.
A gravure printing plate characterized by being configured with 0 different opening areas. 5. The gravure cell according to claim 3 or 4, wherein each of the individual gravure cells formed with a plurality of different opening areas corresponding to a sand grain image that is a unit of a grain pattern is substantially 0. A gravure printing plate, which is formed in a range of 005 to ¹ mm ² . 6. A sand grain pixel in which a plurality of types of different pixel values corresponding to the areas of a sand grain image limited to a plurality of types are dispersed and arranged in a predetermined data memory space in a grain pattern data creating apparatus. Data is created, and then, when the sand grain pixel data is arranged in the arrangement state of the sand grain image when printing the pattern pattern of the sand, the sand grain pixels given the pixel value are configured not to be adjacent to each other. A method for producing a grain pattern printed material, comprising: performing adjacent pixel removal processing for generating the grain pattern data described above, and then printing the grain pattern pattern based on the grain pattern data. 7. The shape condition of the sand grain image is set in the grain pattern data creating apparatus according to claim 6, the pixel value of the sand grain pixel of the grain pattern data, the preset shape condition, and the gravure plate making apparatus. Based on the dot drawing density, dot image data of a sand grain image composed of a plurality of different areas with a predetermined shape is generated, and after making the plate making data of the gravure plate making device, the plate making data is gravure Input to the printing plate device, the photoresist film applied to the gravure cylinder, the dot image of the pattern pattern of the sand composed of sand grains images of a plurality of different areas in a predetermined shape is exposed and drawn, and then Gravure printing in which multiple types of gravure cells with different opening areas are formed by removing the photoresist film from the sand grain image area and then corroding the gravure cylinder with a gravure corrosive machine. A method for producing a grain pattern printed material, comprising producing a plate and printing a grain pattern pattern using the gravure printing plate. 8. The diamond pattern, the rectangle, or the circle according to claim 6 or 7, which is preset in the grain pattern data creating device when the grain pattern data is converted into plate making data of the gravure plate making device. Based on the shape condition of the sand grain image by any one of or a combination of multiple types,
The shape of the gravure cell corresponding to the sand grain image is selected, and the shape of the selected gravure cell and the maximum pixel value of the sand grain pixels that can be set in the data memory space of the grain pattern data creating device are set to 100%. Area ratio,
Generates dot image data that forms sand grain images of different areas, based on different pixel values of multiple types of sand grain pixels,
Then, the dot image data is compressed into a run-length format and converted into plate-making data, which is a method for producing a grain pattern printed matter. 9. The grain pattern data on which the adjacent pixel removal processing has been performed according to claim 6, is divided into a plurality of grain pattern data having a total number of types of pixel values arranged or less according to the pixel value. A method for producing a grain pattern print, comprising producing a plurality of gravure printing plates corresponding to respective grain pattern data and printing the grain pattern pattern using the plurality of gravure printing plates.