JP5692663B2 - Copied and tamper-proof printed matter - Google Patents

Description

  The present invention is easy when copying with a color copier or monochrome copier on printed matter that needs to prevent counterfeiting and falsification of banknotes, stock certificates, securities such as bonds, various certificates and important documents. The present invention relates to a copy and falsification-preventing printed matter that can be checked for authenticity.

  Countermeasures against counterfeiting and falsification are important factors in banknotes, stock certificates, securities such as bonds, printed materials such as various certificates and important documents. These anti-counterfeiting and tampering measures for printed materials can be recognized visually by mainly using a method in which designs with diversified geometric patterns are used in the design and applying some means and actions to the printed material. There is a way to display a latent image that did not exist. Typical examples of the former include tint blocks, color patterns, and relief patterns that are widely used in the design of securities prints, etc., while the latter is a typical example of latent image intaglios and color copiers. There are functional inks that cannot be reproduced, and copy prevention image lines.

  Forgery and tampering prevention measures using the above-mentioned geometric patterns include ground pattern, chromatic pattern, relief pattern, etc., and the pattern is basically composed of a set of curved lines with a fixed line width. is there. These patterns take into account design properties such as the design of printed matter, and can take measures to prevent counterfeiting and tampering. By making the pattern complicated, it is difficult to produce the same pattern on the counterfeit material. It plays a role as a counterfeit prevention measure by generating moiré for the scanning input / output of color copiers, monochrome copiers, or scanners by using colors that are difficult to reproduce on copiers or using complex music lines. It is increasing. In addition, the above-mentioned patterns are widely used worldwide in the design of printed securities, etc., and at the same time, they have been used for a long time as printed patterns having monetary value such as banknotes, stock certificates, bonds, etc. It is an important design as a design that gives a sense of luxury. Therefore, in the printed matter such as banknotes, stock certificates, securities such as bonds, various certificates and important documents, the background pattern, the colored pattern, the relief pattern, etc. are indispensable in design. However, recently, with the advent of sophisticated photoengraving apparatuses, color copiers, and monochrome copiers, there is a drawback in that sufficient anti-counterfeiting and falsification preventing effects are not brought about.

  In addition, as a representative technique of a method in which a latent image that could not be visually recognized appears by adding some means and action to the above-mentioned printed matter, generally a copy protection image is used. There are a series of techniques called lines. Also, the latent image is printed on the surface of the paper with halftone dots, the background of the same density as the latent image is simultaneously printed on the lines, and the decorative pattern is not reproduced on the upper surface of the latent image including the background. By overprinting with transparent ink, the surface of the printed material is finished nicely and when it is copied, the pattern disappears, the background is reproduced, the latent image is not reproduced, and the density difference between the background and the latent image becomes obvious There have been numerous applications for a method that makes it possible to recognize at first glance that this is a copy.

  In many of these inventions, a latent image is formed by the density of an image line group (hereinafter referred to as “screen pattern”) in which dots and lines such as halftone dots or lines are continuously arranged at a constant period, as shown in a printed matter. The pattern on the entire printed surface is a screen pattern having a uniform density. When the printed material on which the latent image has been applied is copied by a color copying machine or a monochrome copying machine, the densely structured screen pattern that is not reproduced and the reproduced coarsely structured screen pattern are as shown in the copied material pattern. A latent image portion of a dense screen pattern that is not reproduced appears against a coarse screen pattern that is reproduced due to a difference in density so that it can be seen at a glance. It is.

  Further, the applicant of the present application also printed a latent image composed of a pattern such as halftone dots or lines on the surface of the paper and a background composed of a pattern different in density from the latent image around the latent image in one color at the same time. As a printed matter suitable for copy prevention, the latent image pattern to which the latent image is applied cannot be identified with the naked eye, another pattern for camouflaging the latent image, a light transparent ink, and a light colored A method of camouflaging has already been filed without using overprinting, such as a white circle pattern or a concentric circle pattern in which the halftone dot percentage of the partial screen pattern is increased with respect to the entire screen pattern (for example, patent document) 1). However, due to the feature that the entire printing surface is a screen pattern, the recent high-function plate making and printing output apparatus has a problem that the image line configuration can be easily reproduced.

  In addition, a latent image is formed using either one of the lines or halftone dots as a constituent, and a background is formed using the other as a constituent, and the lines are 50 lines 10% and the dots are 150 lines 10%. In order to camouflage the entire image line of the latent image and the background image on the original film, an image line configuration has already been filed in which a ground pattern consisting of halftone dots of 175 lines is incorporated and printed on the paper once printed. (For example, see Patent Document 2). However, the background pattern consisting of halftone dots of 175 lines and 10% as a whole is enlarged by being partially connected to the lines and dots constituting the latent image or background, and may be reproduced by copying. It never disappears completely.

  Therefore, in order to solve these problems, the applicant of the present application has made further improvements in order to make the color copying machine or the monochrome copying machine more effective. Specifically, the curved line pattern is a continuous line of the image line where the latent image is not applied, and the image line of the shape where the image line of the portion where the latent image is applied is arranged at a constant interval in the basic line direction. The image of the part corresponding to one period consisting of one image line part and a non-image part continuous in the basic line direction among the fixed period break lines of the part where the latent image is applied. The line area of the portion corresponding to the same length as one period consisting of the image line portion and the non-image line portion in the above-described latent image portion among the continuous lines of the portion where the latent image is not applied. In addition, in the image line that is the fixed period break line of the part where the latent image is applied, the image line of the fixed period break line intersects with one of the image lines. We have filed an application to create a copy-prevention pattern and print it out, which is deleted within the range of the line width of the other line. For example, see Patent Document 3.).

  Further, the applicant of the present application forms an image line pattern composed of one or a plurality of straight lines or curved lines, an image line of a portion where a latent image is not applied, a solid line, and an image line of a portion where a latent image is applied. A latent image was applied to a printed material that consisted of a constant periodic break consisting of a plurality of lines that were branched at equal intervals with the basic line direction as a reference, and the branched lines were arranged at regular intervals. The total image area of a portion corresponding to one cycle consisting of an image portion and a non-image portion branched in a plurality in the basic line direction is the solid line of the portion where the latent image is not applied. By making it equal to the image area of the portion corresponding to the same length as one cycle consisting of the image area and the non-image area in the latent image area, the image becomes invisible when copied, and the image visually recognized before copying is displayed. The image line to be constructed is a round consisting of the image line portion and the non-image line portion in the above-described latent image portion. Have filed a printed material such as larger than streaked area of the portion corresponding to the same length (for example, see Patent Document 4.). This printed matter can be observed as a latent image that was an invisible image after copying with a color copier or a monochrome copier, and the pattern that was a visible image can be observed to be replaced. It is increasing.

Japanese Patent No. 2695523 Utility Model No. 3010365 Japanese Patent No. 3268418 Japanese Patent No. 3689786

  As shown in Patent Document 3 and Patent Document 4, after copying with a color copying machine or a monochrome copying machine, a latent image that was an invisible image appears, and an observation was made so that the pattern that was a visible image was replaced. What can be done is effective as a means for further improving the discrimination in authenticity determination of printed matter. However, in the printed matter of Patent Document 4, the pattern that was a visible image is not completely replaced, and the visible image is given priority for a portion where the visible image and the latent image overlap, and the latent image is partially missing Thus, there is a problem of improving the visibility of an image viewed after copying.

  The printed matter for preventing copying and falsification of the present invention has a copy tension area in which print lines are arranged in a line shape on at least a part of the substrate, and the copy tension area is a first that can be reproduced by a copying machine. A background portion formed by arranging a plurality of first image lines of a certain size at a constant pitch and a plurality of second image lines of a second size that cannot be reproduced by a copying machine are arranged at a constant pitch. A plurality of third image lines and first image lines of a third size that cannot be reproduced by a copying machine having the same or different size as the second size are alternately arranged at a constant pitch. And a common image portion in which a plurality of second image lines and third image lines are alternately arranged at a constant pitch, and a latent image portion, a background portion, and a visible image portion and a common image. And the density of the visible image portion and the common image portion is higher than the density of the latent image portion and the background portion. A visible image is formed by the visible image portion having a higher density than the background portion and the common image portion, and a latent image image is formed by the latent image portion and the common image portion having an image line that cannot be reproduced by the copying machine. It is characterized by.

  The printed matter for preventing copying and falsification of the present invention is characterized in that the first image line and the second image line are arranged on the same line.

  In the copy and falsification preventing printed material of the present invention, when the second image line and the third image line are formed by broken lines in which the image line part and the non-image line part are repeated at a constant cycle, The period of the image line part and the non-image line part constituting the second image line is different from the period of the image line part and the non-image line part constituting the third image line.

  Furthermore, the copy and falsification preventing printed matter of the present invention has the same area ratio of the background portion and the latent image portion, so that the density of the latent image portion and the background portion is equal, and the area ratio of the visible image portion and the common image portion is equal. Thus, the visible image portion and the common image portion have the same density.

  The printed material for copy and falsification prevention of the present invention is a copy of the image visually recognized before copying and the image visually recognized after copying. Without affecting the image to be visually recognized later, it is switched clearly and has excellent authenticity discrimination.

The figure which shows the structure of each image part in the printed matter for copy and falsification prevention The figure which shows the image observed under the reflected light of the printed matter for copy and falsification prevention and the image observed in the copied copy Diagram showing the density relationship before copying with the image line arrangement in the copy control area Diagram showing the density relationship after copying due to the line arrangement in the copy control area The figure which shows the structure of the background part in the printed matter for copy and falsification prevention The figure which shows the structure of the latent image part in the printed matter for copy and falsification prevention The figure which shows the structure of the boundary part of a background part and a latent-image part in a printed matter for copy and falsification prevention The figure which shows the structure of the visible image part in the printed matter for copy and falsification prevention The figure which shows the structure of the common image part in the printed matter for copy and falsification prevention The figure which shows the state of each image section when copying the printed matter for copy and falsification prevention The figure which shows the state before copying in another aspect of the printed matter for copying and falsification prevention The figure which shows the state after copying in another aspect of the printed matter for copying and falsification prevention The figure which shows the structure of each image part of the printed matter for copy and falsification prevention of Example 1. The figure which shows the structure of each image part of the printed matter for copy and falsification prevention of Example 2. The figure which shows the structure of each image part of the printed matter for copy and falsification prevention of Example 3.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated in detail below with reference to drawings based on an Example. FIG. 1 shows a copy (1) for preventing copying and falsification according to the present invention. As shown in FIG. 1 (a), the copy / tamper-proof printed matter (1) has a copy tension area (3) on at least a part of the substrate (2), and the copy tension area (3). The print image line (4) is arranged in a line. Although the detailed configuration of the print image line (4) arranged in the copy control area (3) will be described later, the copy control area (3) has a different configuration as shown in FIG. (4) is constituted by each part arranged.

  Details of each part constituted by different print lines will be described with reference to FIGS. First, in this example, it is assumed that the visible image (9) is “star” and the latent image (10) is “moon”. FIG. 1 (c) shows the background portion (8) as the background of the visible image (9) and the latent image (10), and FIG. 1 (d) shows only the image lines constituting the latent image (10). The latent image portion (6), FIG. 1 (e) shows the visible image portion (5) formed only by the image lines constituting the visible image (9), and FIG. 1 (f) shows the visible image portion (6). The image (9) and the latent image (10) form a common image portion (7) in an overlapping area. The copy suppression area (3) includes a visible image (9) composed of a visible image portion (5) and a common image portion (7), and a latent image image composed of a latent image portion (6) and a common image portion (7). (10) is provided.

  For the sake of convenience of explanation, the “star” and “moon” symbols are visually recognized in the copy control area (3) shown in FIG. 1, but the image observed under reflected light is shown in FIG. As shown in FIG. 5, the background portion (8) and the latent image portion (6) have the same density, and the visible image portion (5) and the common image portion (7) are observed to have the same density. The densities of the visible image portion (5) and the common image portion (7) are observed to be higher than the densities of (8) and the latent image portion (6). Thereby, as shown to Fig.2 (a), the symbol of the "star" of the visible image (9) observed under reflected light can be visually recognized.

  FIG. 2 (b) shows a copy (11) obtained by copying the copy / tamper-proof printed material (1) shown in FIG. 2 (a) with a color copying machine or a monochrome copying machine. In the copy control region (12) in the copy (11), the density of the visible image portion (5) and the background portion (8) is equal, and the latent image portion (6) and the common image portion (7) are dark. Are equal, and the densities of the latent image portion (6) and the common image portion (7) are observed to be lower than the densities of the background portion (8) and the visible image portion (5). As a result, as shown in FIG. 2B, when the copy (11) is observed under reflected light, the “moon” symbol of the latent image (10) can be visually recognized, and copying and falsification can be performed. In the copy (11) in which the printed matter for prevention (1) is copied by a color copying machine or a monochrome copying machine, there is a dramatic change that the visible image (9) and the latent image (10) are completely replaced. become. As described above, the copy / tamper-proof printed matter (1) according to the present invention clearly determines whether the visible image (9) and the latent image (10) partially overlap with each other. Improves sex. Hereinafter, the detailed structure of the printed matter (1) for preventing copying and falsification of the present invention will be described.

  First, the arrangement relationship of the image lines constituting the copy control area (3) will be described with reference to FIG. The detailed configuration of each image line will be described later.

  As shown in FIG. 3, the four drawing lines are arranged on the center line (L1) and the center line (L2) alternately arranged at equal intervals. Note that the center line here is a virtual line to be considered in producing the printed material, and is not a line actually described on the printed material. The distance between the center line (L1) and the center line (L2) is preferably 150 to 300 μm.

  In FIG. 3A, a solid line having a size that can be reproduced by the copying machine is arranged on the center line (L1), and the center line (L2) is not arranged and nothing is drawn. Details of the definition of the size that can be reproduced by the copying machine or the size that cannot be reproduced will be described later.

  In FIG. 3B, an image line that is in a broken line state is arranged on the center line (L1), and the center line (L2) is a non-image line without arranging anything.

  In FIG. 3C, the same solid line as FIG. 3A is arranged on the center line (L1), and the longer side is slightly longer than the fracture line arranged in FIG. 3B on the center line (L2). A break line with a short direction is arranged. Note that the break line shown in FIG. 3C is a break line that is slightly shorter in the longer side direction than the break line shown in FIG. 3B as described above, but it is essential to make it different. Rather, they may be the same. What is important is that the size cannot be reproduced by the copying machine and the size contributes to the density adjustment based on the relationship with other image lines. Details thereof will be described later in the description of each image line configuration.

  In FIG. 3 (d), an image line in the same broken line state as in FIG. 3 (b) is arranged on the center line (L1), and the same broken line as in FIG. 3 (c) is arranged on the center line (L2). An image line that is in a state is placed.

  3A and 3B can be visually recognized at the same density visually, and FIG. 3C and FIG. 3D are based on the arrangement of each image line. ) Can be visually recognized at an equal density. The reason why FIG. 3 (a) and FIG. 3 (b) and FIG. 3 (c) and FIG.

  When the pattern of each image line in this arrangement is reproduced by a copying machine, the state becomes as shown in FIGS. In FIG. 4A, the area drawn with a solid line is reproduced as it is by a copying machine. In FIG. 4B, the line drawn by the broken line cannot be reproduced by the copying machine, and no drawing line is drawn. In FIG. 4 (c), the same solid line area as in FIG. 4 (a) is reproduced as it is, and the area drawn with a broken line is not reproduced, so only the solid line state is obtained. It is reproduced in the same state. Further, in FIG. 4D, since two broken lines are not reproduced by the copying machine, no image line is drawn, and the state is the same as that in FIG.

  As described above, the basic principle of the present invention is that each of the two image portions is classified because the two image portions are visually recognized as equal in density among the image portions having four different image line configurations. However, if the image is reproduced by a copying machine, two image portions different from those at the time of visual observation are reproduced in the same state (equal density). Therefore, the two image portions in the same state cannot be distinguished.

  Next, the details of the image lines constituting the four image portions in the copy control area (3) will be specifically described.

(Background)
FIG. 5 is a partially enlarged view of the background portion (8). The print image line arranged in the background portion (8) is a first image line (13 having a first size that can be reproduced by a copying machine). The background portion (8) is formed by regularly arranging a plurality of first image lines (13) at a constant pitch (P1). At this time, the width (W ₁₃ ) of the first image line (13) is formed in the first size that can be reproduced by the copying machine. The first size is 50 μm or more as the size to be copied, although it depends on the performance of the copying machine.

The print image lines constituting the four image portions in the present invention will be described using the expression of the size of the image line whether or not it can be reproduced by a copying machine. This means the width in the short side direction in the drawing line. Therefore, the first size of the first image line (13) in FIG. 5 is the image line width (W ₁₃ ) in the short side direction of the first image line ( ₁₃ ). Further, in the case of the second image line (14) composed of a broken line as shown in FIG. 6 described later, the image line width of the second image line (14) is (Wy ₁₄ ). Since the line width (Wx ₁₄ ) of each broken line constituting the second image line ( ₁₄ ) is a size that cannot be reproduced by a copying machine, it is referred to in the present invention. , The size of the stroke. Accordingly, in the present invention, the size of an image line indicating whether or not it can be reproduced by a copying machine refers to the width of each image line in the short side direction.

With the above configuration, the background portion (8) is formed with the first area ratio by arranging a plurality of first image lines (13) having a width (W ₁₃ ) at a constant pitch (P1). In the present invention, the area ratio is the ratio of the area of the image line arranged in a certain area of the substrate (2). In this example, the first image line (13) is a solid line. However, in the present invention, the first image line (13) is a straight line as long as it has a size reproducible by a copying machine. There is no limitation on the shape, such as a curve or a wavy line.

(Latent image part)
FIG. 6 is a partially enlarged view of the latent image portion (6). The print image line arranged in the latent image portion (6) is a second image having a second size that cannot be reproduced by a copying machine. The latent image portion (6) is a line (14), and the second image line (14) is regularly arranged at a constant pitch (P1), and the area ratio of the background portion (8) It is composed of equal first area ratios.

The second image line (14) shown in FIG. 6 (a) is an example in which the image line part (14a) and the non-image line part (14b) are constituted by broken lines that are repeated at a constant period (D _x14 ). is there. At this time, the width of the image line portion in the direction in which the print image lines are arranged at a constant pitch (P1) is (Wy ₁₄ ), and is the direction of the print image line, that is, the width of the image line portion in the breaking line direction. the When _{(Wx 14),} it is formed by a second magnitude that the width of the image area _{(Wx 14)} can not be reproduced by the copying machine. The second size is smaller than 50 μm as a size that is not copied, although it depends on the performance of the copying machine. The smaller the period (D _x14 ) between the image line portion and the non-image line portion, the closer the image line portions (14a) are to each other and the easier it is to copy with the copying machine. Therefore, it is necessary to appropriately adjust the period (D _x14 ) between the image area and the non-image area so that the image is not reproduced by the copying machine. At the same time, in order to equalize the area ratio of the latent image portion (6) and the background portion (8), the image area of the second image line (14) is changed according to the area ratio of the background portion (8). It is necessary to appropriately adjust the width (Wx ₁₄ , Wy ₁₄ ) and the period (D _x14 ) of the image area and the non-image area.

FIG. 6A is a partially enlarged view of the latent image portion (6), so that the image line portion (14a) and the non-image line portion (14b) can be distinguished and visually recognized. When the printed matter (1) for preventing falsification is visually observed, the second size and the period (D _x14 ) are small, so that the image cannot be visually distinguished and the image line arranged in the latent image portion (6). (A portion surrounded by a broken line in FIG. 6) is visually recognized as one image line. It is to be noted that the first image line (13) according to the present invention and the first image line (14) according to the present invention are arranged respectively. A configuration for equalizing the area ratios of the image portion (8) and the second image portion (6) is well known in Japanese Patent No. 3268418 and the technology of copy prevention image lines.

  In addition, when the 2nd drawing line (14) is comprised with a broken line, as shown in FIG.6 (b) with respect to the broken line shown to Fig.6 (a), the drawing line part (14a) is inclined. It is good also as the structure which did. In this example, the second image line (14) is arranged in a broken line shape, but if it has a size that cannot be reproduced by a copying machine, it is branched in the longitudinal direction. A linear shape may be used. This configuration is a technique described in Japanese Patent No. 3368327, and details will be described in a second embodiment. In addition, the configuration of the second image line (14) is branched from a single image line described in Japanese Patent No. 3688786 into a plurality of image lines, and the image line portion and the non-image line portion are arranged at regular intervals. The configuration may be a constant periodic disconnection line, and details will be described in the third embodiment.

  In this example, as shown in FIG. 7, at the boundary portion between the background portion (8) and the latent image portion (6), the first image line (13) arranged in the background portion (8) and the latent image portion. A configuration in which the second image line (14) arranged in (6) is arranged on the same line will be described. Note that the first image line (13) and the second image line (14) are arranged in the same line means that the center line (T) of each image line illustrated in FIG. That is. The relationship between the first image line (13) and the second image line (14) is the same as that of the copy prevention image line described in Japanese Patent No. 3268418. At this time, since the first image line (13) and the second image line (14) are visually seen as one straight image line, the most excellent form for concealing the formation of the latent image. It is.

  The principle of observing the visible image (9) under reflected light will be described later. In the present invention, the positions of the center lines of the first image line (13) and the second image line (14) are different. Even in the arrangement, there is no problem as long as the latent image (10) cannot be recognized. This is because even if the positions of the centers of the first image line (13) and the second image line (14) are different, the position of the center line observed under reflected light is different, so that the latent image to be visualized is visualized. This is because the visibility of the visible image (9) due to the difference in area ratio is stronger than the image image (10), and the latent image (10) is difficult to recognize.

(Visible image part)
FIG. 8 is a partially enlarged view of the visible image portion (5), and the print image line arranged in the visible image portion (5) is the same as the first image line (13) and the second size or A third image line (15) of a third size that cannot be reproduced by a copier of a different size, and the first image line (13) and the third image line (15) have a constant pitch. A plurality of (P1) are regularly and alternately arranged. The configuration of the first image line (13) is as described above.

The third image line (15) shown in FIG. 8 is an example in which the image line part (15a) and the non-image line part (15b) are constituted by broken lines that are repeated at a constant period (D _x15 ). At this time, the width of the image line portion in the direction in which the print image lines are arranged at a constant pitch (P1) is defined as (Wy ₁₅ ), and is the direction of the print image line, that is, the image line portion in the direction of the break line When the width is (Wx ₁₅ ), the width (Wx ₁₅ ) of the image line portion is formed in a third size that cannot be reproduced by the copying machine. The third size is smaller than 50 μm as a size that is not copied, although it depends on the performance of the copying machine. That is, the configuration of the third image line (15) is the same as the configuration of the second image line (14), but the third size for preventing the third image line (15) from being reproduced by the copying machine. The size may be different from the second size as long as the size is smaller than 50 μm.

The visible image portion (5) is formed with a second area ratio that is higher than the first area ratio by arranging the first image line (13) and the third image line (15). Has been. At this time, the period (D _x15 ) of the image line part (15a) and the non-image line part (15b) constituting the third image line (15) is the image line part constituting the second image line (14). Although it is desirable to prevent the moire of the visible image (9) observed under reflected light, it is desirable that the pitch is different from the period (D _x14 ) of (14a) and the non-image portion (14b). Also good. In this example, the third image line (15) is arranged in a broken line shape. However, if the image has a size that cannot be reproduced by a copying machine, Similarly to the image line (14), a branched image line described in Japanese Patent No. 3368327 or a branched periodic break line described in Japanese Patent No. 3688786 may be used.

(Common image part)
FIG. 9 is a partially enlarged view of the common image portion (7). The print image lines arranged in the common image portion (7) are the second image line (14) and the third image line (15). The second image line (14) and the third image line (15) are regularly and alternately arranged at a constant pitch (P1). The configurations of the second image line (14) and the third image line (15) are as described above. In FIG. 9A, the second image line (14) and the third image line (15) are constituted by broken lines, and the image line portion (14a) constituting the second image line (14) is not The period (D _x14 ) of the image line part (14b) is the same as the period (D _x15 ) of the image line part (15a) and the non-image line part (15b) constituting the third image line (15). ing. As described above, as shown in FIG. 9B, the period (D _x15 ) of the image line part (15a) and the non-image line part (15b) constituting the third image line (15), and the second The moiré of the visible image (9) that is observed under reflected light is different in a form in which the period (D _x14 ) of the image area (14a) and the non-image area (14b) constituting the image line (14) is different. Is unlikely to occur. The common image portion (7) is formed to have a higher area ratio than the first area ratio by arranging the second image line (14) and the third image line (15).

  In the common image portion (7) and the visible image portion (5), the area ratio of each image portion by the third image line (15) is the same, and the visible image portion (13) by the first image line (13) ( The area ratio of 5) and the area ratio of the common image portion (7) by the second image line (14) are also the same. Therefore, the area ratio of the common image portion (7) is equal to the second area ratio in the visible image portion (5).

  The printed image line (4) formed in the copy suppression region (3) described above is formed of a color material having a color different from that of the base material (2). The color material to be used is not particularly limited as long as it is a color different from that of the base material (2), and commercially available normal inks and inks can be used. The printing method can be formed by any printing method such as offset printing, flexographic printing, letterpress printing, gravure printing, screen printing, intaglio printing, and ink jet printing.

(Visible image)
In the copy control region (3) including the background portion (8), the latent image portion (6), the visible image portion (5), and the common image portion (7) described above, “ The visible image (9), which is a symbol of “star”, is formed by the visible image portion (5) having the second area ratio and the common image portion (7). Since the visible image portion (9) and the common image portion (7) are configured with a second area ratio that is higher than the first area ratio, the area ratio of the copy control region (3) Due to the difference in density, the visible image (9) can be observed under reflected light.

(Latent image)
The latent image (10), which is the “moon” symbol shown in FIG. 2 (b), has a second image line (14) that is an image line having a size that cannot be reproduced by the copying machine. Part (6) and a common image part (7) having a second image line (14) and a third image line (15) which are image lines of a size that cannot be reproduced by a copying machine. . Subsequently, the principle of appearance of the latent image (10) will be described.

  FIG. 2 (b) shows a state in which the copy / tamper-proof printed matter (1) shown in FIG. 2 (a) is copied by a color copying machine or a monochrome copying machine, and the copying shown in FIG. 2 (b). When the copy control area (12) of the object (11) is enlarged, four image portions having different print lines as shown in FIG. 10 are obtained.

  In the background portion (8) in the copy shown in FIG. 10A, the first image line (13) is substantially reproduced as it is. In the latent image portion (6) in the copy shown in FIG. 10 (b), the broken line-shaped second image line (14) is formed with a size smaller than 50 μm. Due to the limitations of this, it cannot be read into a copier and is not reproduced. In the visible image portion (5) in the copy shown in FIG. 10 (c), the first image line (13) is reproduced as it is, but the broken line-shaped third image line (15) is also reproduced. Like the second image line, it is not reproduced because it is formed with a size smaller than 50 μm. Further, the common image portion (7) in the copy shown in FIG. 10D has a size in which the broken line-shaped second image line (14) and the third image line (15) are smaller than 50 μm. It is not reproduced because it is formed by.

  As a result, the background portion (8) and the visible image portion (5) are visually observed as substantially the same density because the first image line (13) is reproduced as it is, and are shared with the latent image portion (6). The part (7) includes a latent image part (6) in which the second image line (14) and the third image line (15) are not reproduced and the second image line (14) not reproduced is arranged, A latent image (10) composed of a common image portion (7) having a second image line (14) and a third image line (15), which are image lines of a size that cannot be reproduced by a copying machine. Visible.

  The embodiment described above is an example in which the respective image portions illustrated in FIG. 1B are relatively clearly divided to form the visible image (9) and the latent image (10). Is shown below.

  In FIG. 11, a copy-forgery-inhibited pattern (17) is formed as a visible image (9) on the entire surface in the copy-control area (3) of the copy / tamper-proof printed matter (1). The image lines and each image portion constituting the tint block pattern (17) will be described in detail below.

  In the tint block pattern (17), as shown in FIG. 11, a latent image (10) of characters “P” is formed. In the drawing, the letter “P” is suggested by a dotted line, but it is not actually recognized. The first image line (13), the second image line (14), and the third image line in the area (P2) constituting the latent image (10) and the other area (P1). The visible image portion (5), the latent image portion (6), the common image portion (7), and the background portion (8) are configured using (15).

  First, the image line configuration of the region (P1) other than the latent image (10) will be described. As shown in the enlarged view of one pattern (P1) of the tint block pattern (17), the area where only the first image line (13), which is a solid line, is arranged is the background portion (8). The area where the first image line (13) and the third image line (15) having a broken line shape are alternately arranged is the visible image portion (5).

  The visible image part (5) has a larger area ratio than the background part (8). That is, since the visible image portion (5) has a higher apparent density than the background portion (8), the region of the tint block pattern (17) composed of an arbitrary design is configured by the visible image portion (5). And some pattern is recognized by the observer.

  Next, the region (P2) constituting the character “P” that becomes the latent image (10) will be described. As shown in the enlarged view of (P2), the area where only the second line (14) having a broken line shape different from the third line (15) is arranged becomes the latent image portion (6). A region where the second image line (14) and the third image line (15) other than that are alternately arranged is the common image portion (7).

  The visible image portion (5) has a larger area ratio than the latent image portion (6). That is, since the common image portion (7) has a higher visual density than the latent image portion (6), the region of the tint block pattern (17) composed of an arbitrary design is configured by the visible image portion (5). Thus, some pattern is recognized by the observer.

  FIG. 12 shows a copy (11) obtained by reproducing a copy and anti-tampering printed matter (1) in which each image portion is formed with the image line configuration as described above by a copying machine. As shown in FIG. 12, the character “P” in the latent image (10) is confirmed in a white state. Since both the second image line (14) and the third image line (15) constituting the character “P” were composed of broken lines that could not be reproduced by the copying machine, It is not reproduced by a copying machine, and is in a white state.

  In the area other than the letter “P” in the latent image (10), the third image line (15) having a size that cannot be reproduced by the copying machine disappears without being reproduced, and is reproduced by the copying machine. Since only the first image line (13) having a possible size is reproduced and only a flat solid line is obtained, the background pattern (17) is not reproduced.

  Accordingly, in this form of copy / tamper-proof printed matter (1), a copy-forbidden area of the copy-forgery-inhibited print (1) has a visible image of the copy-forgery-inhibited pattern (17) before copying, and when copied by a copying machine, (9) disappeared, and the character “P” of the latent image (10) appeared, and the visible image (9) and the latent image (10) were switched. .

  As described above, the copy / tamper-proof printed matter (1) of the present invention contributes to the visibility of the visible image (9) by the reflected light in the common image portion (7), and when copied by a copying machine, Disappearing and contributing to the visualization of the latent image (10) has the effect of clearly changing the image that can be visually recognized in the same area, which was impossible with the prior art, and authenticity determination. Excellent in properties.

  In the above description, the background portion (8) and the latent image portion (6) are formed with the first area ratio, so that they can be visually recognized with the same density, but can be viewed with the same density. As well as making the area ratio the same, the density observed under reflected light can be adjusted by the color of the color material used and the thickness of the color material forming the printed image line (3). it can. If the size is within the range that can be reproduced by the copying machine and the size that cannot be reproduced by the copying machine, the color material constituting the print image line (4) and the thickness are made different, and the background portion ( 8) and the density of the latent image portion (6) may be adjusted to the same density. The same applies to the visible image portion (5) and the common image portion (7). However, in the above-described form in which the area ratios are different, it is possible to produce a printed matter (1) for preventing copying and falsification by using one color material, such as screen printing or gravure printing for adjusting the thickness. Since a special printing machine is not required, the manufacturing cost is low, which is a preferred embodiment of the present invention.

  Hereinafter, examples of copy and falsification-preventing printed materials that have been specifically produced in accordance with the above-described modes for carrying out the invention will be described in detail. However, the present invention is not limited to these examples.

  In the first embodiment, the first image line (13) is formed by a straight line, and the second image line (14) and the third image line (15) are formed by a broken line. ). The configuration of each image unit will be described using the same example as the configuration shown in FIG. FIG. 13 is a partially enlarged view of the copy control area (3) in the copy (1) for preventing copy and falsification of the first embodiment.

In the first image line (13) arranged in the background part (8) and the visible image part (5), a plurality of linear image lines having an image line width (W ₁₃ ) of 50 μm are arranged at a pitch of 450 μm. . At this time, the first area ratio in the background portion (8) is about 11%. The second image line (14) arranged in the latent image part (6) and the common image part (7) has an image line part width (Wy ₁₄ ) of 207 μm in the direction in which the print image line is arranged, A plurality of break lines having a width (Wx ₁₄ ) of the image line part in the direction of the break line of 35 μm and a period (D _x14 ) of the image line part and the non-image line part 145 μm arranged at a pitch of 450 μm. At this time, the area ratio in the latent image portion (6) is about 11%, similar to the first area ratio in the background portion (6).

The third image line (15) arranged in the visible image part (5) and the common image part (7) has an image line part width (Wy ₁₅ ) of 120 μm in the direction in which the print image line is arranged, A plurality of break lines having a width (Wx ₁₅ ) of the image line part in the direction of the break line of 35 μm and a period (D _x15 ) of the image line part and the non-image line part being 155 μm were arranged at a pitch of 450 μm. The third image line (15) is alternately arranged with the first image line (13) and the second image line (14), and the first image line (13) and the second image line (14) are arranged alternately. The distance between the center line of the third image line (15) and the center line of the line (14) was 225 μm. The visible image portion (5) and the common image portion (7) have a higher area ratio than the background portion (8) and the latent image portion (6) because the third image line (15) is formed. The area ratio of 2 is about 17%.

  The copy and falsification-preventing printed matter (1) of Example 1 formed as described above has a common image portion (5) and a common image portion (2) formed at the second area ratio when observed under reflected light. 7) can be visually recognized, and when copied by a copying machine, the image lines of the latent image portion (6) and the common image portion (7) are not reproduced, and the first image line is reproduced. By reproducing only (13), the “Moon” symbol could be visually recognized.

  In Example 2, the first image line (13) was formed by a straight line, and the second image line (14) and the third image line (15) were formed by branch lines described in Japanese Patent No. 3368327. The falsification preventing printed matter (1). The configuration of each image unit will be described using the same example as the configuration shown in FIG. FIG. 14 is a partially enlarged view of the copy control area (3) in the copy (1) for preventing copy and falsification of the second embodiment.

In the first image line (13) arranged in the background part (8) and the visible image part (5), a plurality of linear image lines with an image line width (W ₁₃ ) of 50 μm are arranged at a pitch of 450 μm. . At this time, the first area ratio in the background portion (8) is about 11%. The second image line (14) arranged in the latent image portion (6) and the common image portion (7) is composed of two branched linear image lines (14A, 14B), and is a print image line. The image line width (Wy ₁₄ ) in the direction in which the image is arranged is 25 μm, and the image line interval (Dy ₁₄ ) is 50 μm. That is, in Example 2, the sum of the width (Wy ₁₄ ) of the two branched image lines constituting the second image line (14) with respect to the image line width (W ₁₃ ) of the first image line. Are in the same relationship. Thereby, the area ratios of the background portion (8) and the latent image portion (6) are the first area ratios equal to each other.

The third image line (15) arranged in the visible image part (5) and the common image part (7) is also configured in the same manner as the second image line (14), and the direction in which the print image line is arranged. The image line width (Wy ₁₅ ) was set to 25 μm, and the image line interval (Dy ₁₅ ) was set to 50 μm. Note that, when the second image line (13) and the third image line (14) are configured as branch lines described in the second embodiment, the image line width (Wy ₁₄ ) and the image line width (Wy ₁₅ ). Need not be smaller than 50 μm in order not to be reproduced by a copying machine. Also, if the third image line (15) can be alternately arranged with respect to the first image line (13) and the second image line (14), the space between the image lines (Dy _14). ) And the line interval (Dy ₁₅ ) may have different sizes.

  The copy (1) for preventing duplication and falsification of Example 2 formed with the above configuration can visually recognize the “star” symbol when observed under reflected light, as in Example 1. When copying with, the effect of visually recognizing the “Moon” symbol was obtained.

  In the printed matter of Example 3, the first image line (13) is formed as a straight line, and the second image line (14) and the third image line (15) are formed as one image described in Japanese Patent No. 3688786. This is a copy (1) for preventing copying and falsification, which is formed by a fixed periodic break line in which a line part and a non-line part are branched at a constant interval from a line to three lines. The configuration of each image unit will be described using the same example as the configuration shown in FIG. FIG. 15 is a partially enlarged view of the copy restraint area (3) in the copy and falsification preventing printed material (1) of the third embodiment.

The first image line (13) arranged in the background portion (8) and the visible image portion (5) includes a plurality of linear image lines having an image line width (W ₁₃ ) of 57.5 μm at a pitch of 450 μm. Arranged. At this time, the first area ratio in the background portion (8) is about 13%. The second image line (14) arranged in the latent image portion (6) and the common image portion (7) is composed of three branched image lines (14A, 14B and 14C). The three branched lines here are in a state where a plurality of broken lines are arranged on a straight line. In FIG. 15, three broken lines arranged on a straight line are arranged in parallel. It is in a state. The branched image lines (14A, 14B, and 14C) have a configuration of a periodic break line in which the image line portion and the non-image line portion are repeated at a constant interval (D _x14 ). In addition, the image line part which comprises the branched image line (14A, 14B, and 14C) is the width ( _Wx14 ) of the image line part in the direction of a breaking line, and the width of the image line part in the direction where a print image line is arranged. The square (Wy ₁₄ ) was 45 μm, and the interval (D _x14 ) between the image line portions was 105 μm. The interval (D _y14 ) between the branched image line (14A) and the image line (14C) was 45 μm.

The third image line (15) arranged in the visible image part (5) and the common image part (7) is also configured in the same manner as the second image line (14), and branched image lines (15A, 15B). 15C) is a square whose width (W _x15 , W _y15 ) is 45 μm, and the distance (D _x15 ) between the image line portions is ₁₀₅ μm. The interval (D _y15 ) between the branched image line (15A) and the image line (15C) was 45 μm. Note that, when the second image line (14) and the third image line (15) have the branched break line configuration described in the third embodiment, the width (Wx ₁₄ ) of the image line portion and the image line portion are described. The width (Wx ₁₅ ) and the width of the image area (Wy ₁₄ ) and the width of the image area (Wy ₁₅ ) do not have to be the same, but are smaller than 50 μm in order to have a size that cannot be reproduced by a copying machine. There is a need to. Also, if the third image line (15) can be alternately arranged with respect to the first image line (13) and the second image line (14), the space between the image lines (Dy _14). ) And the line interval (Dy ₁₅ ) may have different sizes.

DESCRIPTION OF SYMBOLS 1 Copying and falsification prevention printed material 2 Base material 3 Copying suppression area 4 Print image line 5 Visible image part 6 Latent image part 7 Common image part 8 Background part 9 Visible image 10 Latent image 11 Copying object 12 Copying suppression area in a copy 13 First Image Line 14 Second Image Line 15 Third Image Line 17 Background Pattern

Claims (4)

A copy tension region in which printed lines are arranged in a line on at least a part of the substrate;
The copy control area includes a background portion in which a plurality of first image lines of a first size that can be reproduced by a copying machine are arranged at a constant pitch;
A latent image portion in which a plurality of second image lines having a second size that cannot be reproduced by a copying machine are arranged at the predetermined pitch;
A third image line having a third size that cannot be reproduced by a copier that is the same as or different from the second size and a plurality of the first image lines alternately arranged at the constant pitch are visible. An image part;
The second image line and the third image line are composed of a common image portion in which a plurality of the image lines are alternately arranged at the constant pitch.
The latent image portion, the background portion, the visible image portion, and the common image portion have the same density, and the visible image portion and the common image portion have higher densities than the latent image portion and the background portion. Formed,
The latent image portion and the common image, in which a visible image is formed by the visible image portion and the common image portion having a higher density than the latent image portion and the background portion, and have an image line whose size cannot be reproduced by a copying machine. A printed matter for preventing copying and falsification, wherein a latent image is formed by a portion. The printed matter for preventing copying and falsification according to claim 1, wherein the first image line and the second image line are arranged on the same line. When the second image line and the third image line are formed by broken lines in which the image line part and the non-image line part are repeated at a constant cycle, the image line part constituting the second image line 3. The printed matter for preventing copying and falsification according to claim 1 or 2, wherein a cycle of the non-image portion is different from a cycle of the image portion and the non-image portion constituting the third image line. Since the area ratio of the background portion and the latent image portion is equal, the density of the latent image portion and the background portion is equal, and the area ratio of the visible image portion and the common image portion is equal, the visible image portion The printed matter for preventing copying and falsification according to any one of claims 1 to 3, wherein the density of the common image portion is equal to that of the common image portion.

Images