JP7238597B2 - IMAGE FORMING METHOD, IMAGE FORMING APPARATUS, PROGRAM AND REPRODUCTION - Google Patents

Description

The present invention relates to an image forming method, an image forming apparatus, a program, and a duplicate, and more particularly to an image forming method for duplicating a duplication target having metallic luster such as a gold folding screen.

2. Description of the Related Art In recent years, techniques have been developed for making high-quality copies of decorations such as cultural assets, works of art, and handicrafts by printing using inkjet printers instead of by handwriting.

Dye ink, pigment ink, and other water-based inks are usually used for the reproduction of ornaments using an inkjet printer. It is difficult to reproduce the pattern because it does not permeate and does not dry easily. For this reason, UV (Ultra-Violet) curable ink is used for replicating foiled ornaments. As such a technique, a technique has been proposed in which a gold foil adhered to a base material such as paper is coated with a base layer using UV curable ink to block metallic luster, and a pattern is printed thereon. (See Patent Document 1, for example).

JP 2009-196106 A

However, when the gloss of the gold foil is blocked by the underlayer of the UV curable ink as described above, the gloss is suppressed by the underlayer, and the texture of the base material and the gold foil disappears, and the pattern becomes flat like vinyl. become. As a result, the subtle texture inherent in the foil portion and pattern portion of the ornament is significantly impaired in the duplicate.

The present invention has been made in view of such problems, and aims to provide an image forming method capable of reproducing the texture of ornaments such as cultural assets including a foil portion and a pattern portion. An object of the present invention is to provide an image forming apparatus, a program, and a copy.

In order to solve the above problems, according to one aspect of the present disclosure, an image to be copied having a first region having metallic luster and a second region other than the first region is formed by an inkjet method. An image forming method for forming
forming a masking layer for masking the metallic luster in a region corresponding to the second region on the base layer having the metallic luster provided on the substrate;
forming a pattern layer on which the pattern to be duplicated is printed on the concealing layer;
and forming a first mat layer that imparts texture on the pattern layer.

Here, a step of providing an old-color reproduction layer that reproduces the color to be duplicated in a region corresponding to the first region;
and forming a first matte layer over at least a portion of the patina layer.

Further, the glossiness of the area where the first mat layer is formed on the antique color reproduction layer is 40% or less, and the glossiness of the other area on the antique color reproduction layer is greater than 40%. can do.

Further, the glossiness of the antique color reproduction layer may be higher than the glossiness of the pattern layer.

The method may further include, before the step of forming the concealing layer, forming a second matte layer on at least a portion of the underlayer for suppressing glossiness of the underlayer.

Further, the second mat layer may be a layer having a lower matting agent concentration than the first mat layer.

Also, the second mat layer may be formed on the entire surface of the underlayer.

Further, the glossiness of the pattern layer may be 40% or less.

Further, the glossiness of all the areas to be copied may be 100% or less.

The method may further include the step of forming a texture pattern representing the texture of the object to be copied with ultraviolet curable ink on the masking layer before the step of forming the pattern layer.

According to another aspect of the present invention, there is provided an image forming method for forming an image to be replicated having metallic luster by an inkjet method, comprising:
A step of providing an old-color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
and forming a texture-imparting first matte layer on at least a portion of the antique reproduction layer.

According to another aspect of the present invention, there is provided a program that causes a computer to execute any of the image forming methods described above.

According to another aspect of the present invention, there is provided an image forming apparatus for forming an image to be copied having a first area having metallic luster and a second area other than the first area by an inkjet method, ,
concealing layer forming means for forming a concealing layer that conceals the metallic luster in a region corresponding to the second region on the base layer having metallic luster provided on the substrate;
a pattern layer forming means for forming a pattern layer on which the pattern to be duplicated is printed on the concealing layer;
and mat layer forming means for forming a mat layer on the pattern layer.

According to another aspect of the present invention, there is provided an image forming apparatus for forming an image to be copied having metallic luster by an inkjet method,
An old-color reproduction layer forming means for providing an old-color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
and mat layer forming means for forming a mat layer on at least part of the old color reproduction layer.

According to another aspect of the present invention, a replica to be replicated has a first region having metallic luster and a second region other than the first region, wherein metallic luster is provided on a base material. a base layer having To provide a duplicate in which a printed pattern layer is formed and a mat layer imparting texture is formed on the pattern layer.

According to another aspect of the present invention, there is provided a replica to be replicated having metallic luster, wherein a base layer having metallic luster is formed on a base material, and a base layer having a color to be duplicated is formed on the base layer. and a matte layer formed on at least a part of the old color reproduction layer.

According to another aspect of the present invention, there is provided an image forming method for forming an image to be copied having a first region having metallic luster and a second region other than the first region by an inkjet method, ,
forming a masking layer for masking the metallic luster in a region corresponding to the second region on the base layer having the metallic luster provided on the substrate;
forming a pattern layer on which the pattern to be duplicated is printed on the concealing layer;
and forming a first control layer that imparts texture on the pattern layer to reduce the glossiness of the pattern layer to 40% or less.

According to another aspect of the present invention, there is provided an image forming method for forming an image to be duplicated having metallic luster by an inkjet method, comprising:
A step of providing an old-color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
and forming a texture imparting first control layer on at least a portion of the antique color reproduction layer, wherein the glossiness of the region in which the first control layer is formed on the antique color reproduction layer. is 40% or less, and the glossiness of other areas on the antique color reproduction layer is greater than 40%.

According to another aspect of the present invention, a replica to be replicated has a first region having metallic luster and a second region other than the first region, wherein metallic luster is provided on a base material. a base layer having To provide a duplicate having a printed pattern layer formed thereon, a control layer imparting texture to the pattern layer formed thereon, and the pattern layer having a glossiness of 40% or less.

According to another aspect of the present invention, there is provided a replica to be replicated having metallic luster, wherein a base layer having metallic luster is formed on a base material, and a base layer having a color to be duplicated is formed on the base layer. is formed, a control layer that imparts a texture is formed on at least a part of the antique color reproduction layer, and the glossiness of the area where the control layer is formed on the antique color reproduction layer is less than or equal to 40% and the gloss of other areas above said patina layer is greater than 40%.

According to the present disclosure, in a replica of a cultural asset or the like that includes a foil portion and a pattern portion, it is possible to give the pattern portion the original texture of the object to be replicated while maintaining the brilliance of the foil portion.

1 is a block diagram showing the configuration of a system for manufacturing duplicates; FIG. 2 is a block diagram showing the functional configuration of the image forming apparatus; FIG. FIG. 4 shows the structure of a replica manufactured according to one embodiment; 4 is a flow chart illustrating steps of a method performed by an image forming apparatus; It is a figure which shows the manufacturing process of the duplicate which concerns on one Embodiment in steps. FIG. 4 shows the structure of a replica manufactured according to one embodiment; 4 is a flow chart illustrating steps of a method performed by an image forming apparatus; 2 is a block diagram showing the functional configuration of the image forming apparatus; FIG. FIG. 4 shows the structure of a replica manufactured according to one embodiment; 4 is a flow chart illustrating steps of a method performed by an image forming apparatus; FIG. 4 is a diagram showing a layer structure of a replica of a gold folding screen according to an example.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Due to advances in computer graphics and measurement technology, the creation of digital archives that digitize and utilize historical cultural properties is in full swing. Under these circumstances, efforts are being made to accurately digitally archive the shape and color information of historical cultural properties using three-dimensional shape measurement technology and color measurement technology. Gold leaf is used for many of the historical cultural properties, such as folding screens and sliding doors with gorgeous decorations. Since the gold leaf is thin, the unevenness of the base is visible where the gold leaf is applied. For example, when Japanese paper is used as the base, the rough pattern on the surface of the Japanese paper may stand out. In addition, in the case of historical cultural properties, there are cases where the groundwork changes or the gold leaf twists due to aging, and the surface is not flat and often has a so-called expression on the surface. This kind of expression creates a unique texture, and there is a part that draws out the historical weight and goodness as a work of art. In addition, the patterned parts of ornaments using gold leaf are sometimes elaborated with techniques that give changes to the surface, such as gofun and gold paint mixed with gold leaf and glue, to express the texture. Therefore, high-quality duplication is required. In the following, a technique for manufacturing a high-quality reproduction of a gold folding screen as such a historical cultural property will be described as an example. The present invention can be applied to various ornaments having metallic luster, such as pictures drawn on gold or silver foil stamped on fusuma and folding screens, crafts stamped with gold or silver foil, and furnishings. It is possible.

(First embodiment)
FIG. 1 is a block diagram showing the configuration of a system for manufacturing duplicates according to one embodiment of the present invention. A system 1 includes a camera 2, a terminal device 3, and an image forming device 100, and is configured to be able to communicate with each other.

Camera 2 includes imaging device 5 , camera controller 6 , and storage device 7 . The camera 2 is for obtaining imaged data to be duplicated, and an imaging device 5 simultaneously photographs an object to obtain an image to be duplicated. The imaging device 5 moves in response to an instruction from the camera controller 6 and captures an image to be duplicated. An image signal output from the imaging device 5 is converted into digital image data. As a result, digital image data for a plurality of images is stored in the storage device 7 of the camera 2 . The image data is data conforming to the RGB standard consisting of R (red), G (green), and B (blue). Further, the camera 2 stores the image data acquired as described above in the storage device 7 .

Various devices such as a digital camera, a flat scanner, a 3D laser scanner, a CT scanner, etc. may be used as the camera 2 for capturing images of the object to be copied.

The terminal device 3 is for setting and controlling the image forming apparatus 100, and is configured by a personal computer or the like. The terminal device 3 receives the image data to be duplicated generated by the camera 2, stores it in an internal storage device, and instructs the image forming device 100 to perform print processing based on this data.

The image forming apparatus 100 forms an image by applying ink to a print medium, and is configured as an inkjet printer.

FIG. 2 is a block diagram showing the functional configuration of the image forming apparatus 100 according to this embodiment. Image forming apparatus 100 includes acquisition unit 102 , input unit 103 , storage unit 104 , display unit 105 and printing unit 110 .

Acquisition unit 102 is configured to receive image data, setting values necessary for operating image forming apparatus 100, and commands such as print instructions from terminal device 3 .

The input unit 103 is for receiving instructions, setting values, and the like for operating the image forming apparatus 100 from the operator, and is configured by a touch panel, buttons, and the like.

Storage unit 104 stores image data 106 . Further, the storage unit 104 is configured to store a program for executing the processing according to the present embodiment, other data used in the arithmetic processing, or data of the arithmetic result. Specifically, the storage unit 104 is a volatile memory inside the computer system (eg, DRAM (Dynamic Random Access Memory), SRAM (Static Random Access Memory)), USB flash drive, removable hard disk, ROM (Read Only Memory). , a magnetic disk or an optical disk, or the like.

A display unit 105 displays setting values and status information of the image forming apparatus 100 as well as messages and buttons for receiving command inputs from the operator, and is composed of a liquid crystal display or the like.

The printing unit 110 forms an image using an inkjet method. The printing unit 110 has a recording head 111 that ejects ink from nozzles to form an image, and a control unit 115 that controls the recording head 111 . to be discharged at high speed. Inks of C (cyan), M (magenta), Y (yellow), and K (black) are used, and various colors are expressed by overlapping these. In addition, the printing unit 110 uses opaque white ink (for example, white ink in which titanium oxide is mixed with resin) or clear ink to form the concealing layer.

Note that special color inks prepared to reproduce colors that cannot be reproduced by a combination of these inks may be used.

The printing unit 110 uses ink, matte varnish, or a clear type of matte ink as the paint to be applied to the print medium. Ultraviolet (UV) curable ink is used as the ink. UV curable ink is an ink that generates a photochemical reaction by irradiating ultraviolet rays to form and fix a cured film on a print medium. UV curable inks use organic solvents as solvents, organic and inorganic pigments as colorants, and contain polymerizable substances (monomers or oligomers) and photoinitiators. With such a composition, when the UV curable ink is irradiated with UV light, the photopolymerization initiator absorbs the UV light and generates radicals. Then, the radical of the photopolymerization initiator reacts with the reactive group of the polymerizable substance to initiate the photopolymerization reaction of the polymerizable substance. This photopolymerization reaction progresses in a chain reaction, and the ink changes from liquid to solid in an extremely short time. Therefore, the UV curable ink has the feature that it does not require waiting time for drying. In addition, UV curable ink can be applied to printing on various media such as non-absorbent resin, glass, metal, etc., which are usually difficult to print with offset printing.

In addition, the clear type matte varnish or matte ink is made of cellulose resin, styrene resin, acrylic resin, vinyl resin, modified polyolefin resin, rubber resin, olefin resin, or alkyd synthetic resin, and silica or kaolin. It is composed by mixing a matting agent. The clear type of matte varnish or matte ink may be UV curable. The clear type of matte varnish or matte ink is adaptively selected, and the matte varnish is used when performing offset printing, and the clear type of matte ink is used when performing silkscreen printing.

Next, the functional configuration of the control unit 115 will be described. The control unit 115 forms a concealing layer forming unit 112 that forms a concealing layer that conceals the metallic luster on the underlayer having metallic luster provided on the base material, and forms an antique color reproduction layer on the underlayer. a pattern layer forming unit 114 that forms a pattern layer printed with a pattern to be duplicated on the masking layer; and a mat layer on the base layer, the pattern layer, and the pattern layer. and a mat layer forming portion 116 to be used.

Specifically, the operations of the acquiring unit 102 and the printing unit 110 according to the present embodiment are collectively controlled by an arithmetic processing device such as a CPU (Central Processing Unit) provided in the inkjet printer. This arithmetic processing unit performs the above control by reading and executing a program stored in the storage unit 104 .

Next, with reference to FIG. 3, the configuration of the replica manufactured according to the first embodiment of the present invention will be described. Here, the object to be duplicated is a gold folding screen, which has a gold leaf area with metallic luster and a pattern area. FIG. 3(a) shows a part of the replica, and FIG. 3(b) shows a cross-sectional view along AA of the part shown in FIG. 3(a). In the duplicate 300, a base layer 304 having a metallic luster made of gold foil or gold paper is adhered to a base material 302 made of paper with an adhesive for gold foil. This base layer 304 serves as a base layer for forming the image of the gold folding screen. On the underlying layer 304, a masking layer 306 is formed in a region corresponding to the pattern region of the gold folding screen, and an antique color reproduction layer 308 is formed in a region corresponding to the stain of the gold leaf of the gold folding screen.

The concealing layer 306 is a layer that conceals the glossiness of the base layer 304 and on which the pattern of the gold folding screen is recorded, and is formed of white UV curable ink.

The antique color reproduction layer 308 corresponds to the gold leaf area where no pattern is drawn on the gold folding screen to be replicated, and is a layer that expresses the color tone caused by changes in the base due to aging (dirt, stains, etc.) and twists of the gold leaf. is. The antique color reproduction layer 308 is formed of transparent UV curable ink, so that the luster of the base layer 304 can be seen through it.

The position where the antique color reproduction layer 308 is formed can be determined according to the color tone of the gold leaf portion to be duplicated. Therefore, the concealing layer 306 and the antique color reproduction layer 308 may be formed continuously in the horizontal direction as shown on the left side of FIGS. You don't have to. In the portion shown on the right side, a matte layer 312 is formed between the masking layer 306 formed on the base layer 304 and the antique color reproduction layer 308 .

A pattern layer 310 is formed on the masking layer 306 with full-color UV curable ink. A mat layer 312 is formed on the pattern layer 310 and the base layer 304 and antique color reproduction layer 308 whose surfaces are exposed. The matte layer 312 functions as a first control layer for imparting textures such as Japanese paper and gold foil thereon, and specifically, a clear type of UV curable matte varnish or matte ink is used.

With such a layered structure, it is possible to give the duplicate the texture of the historical cultural property to be duplicated.

Here, the matte layer 312 does not need to cover all the exposed portions of the base layer 304 and the antique color reproduction layer 308, and the matte layer 312 may be selectively formed according to the glossiness of the copy target. For example, the mat layer 312 may be formed on the exposed portions of the base layer 304 and the old-color reproduction layer 308 that correspond to the portions that are coated with a mixture of gold powder and animal glue (gold paint). With such a layered structure, it is possible to create variations in texture of the gold leaf.

Although paper is used as the base material 302 in the duplicate 300 described above, other base material such as wood or resin may be used.

Also, in the reproduction 300 shown in FIG. may

Further, the antique color reproduction layer 308 and the mat layer 312 exposed on the surface of the duplicate 300 may be coated with a water-resistant urethane resin or the like.

FIG. 4 is a flow chart of the procedure of the method executed by the image forming apparatus 100 according to this embodiment. FIG. 5 is a step-by-step diagram showing the production of replicas. The procedure of the method executed by the image forming apparatus according to the present embodiment will be described below with reference to FIGS. 4 and 5. FIG.

First, in step S202, the acquisition unit 102 of the image forming apparatus 100 acquires data to be copied. In this embodiment, the acquired data includes image data 106 . This data is stored in the storage unit 104 .

In subsequent processes, a duplicate is manufactured using a member having a base layer 304 provided on a base material 302 such as paper (FIG. 5A).

Acquisition unit 102 of image forming apparatus 100 receives image data and a print instruction based on this data from terminal device 3 . Image forming apparatus 100 stores the received data in image data 106 of storage unit 104 .

Next, the process proceeds to step S204, and the concealing layer forming unit 112 of the image forming apparatus 100 reads out the image data 106 conforming to the RGB standard stored in the storage unit 104. FIG. The concealing layer forming unit 112 determines whether each position on the base layer 304, for example, the position of each ink dot onto which the print head 111 ejects UV curable ink, is a gold foil area or a pattern area. This determination is performed based on the data of the area demarcated according to the result of determination of the area of the gold leaf by observing the object to be replicated by visual observation or the like. The determination of the gold leaf area can be based on the supervision of an expert.

Then, when it is determined to be a pattern portion, a concealing layer 306 is formed in a region corresponding to the pattern portion on the base layer 304 (FIG. 5B).

Here, the positional information defining the area where the concealing layer 306 is formed is stored in the storage unit 104 .

Next, in step S<b>206 , the pattern layer forming unit 114 converts the RGB-compliant image data into CMYK data based on the CMYK profile corresponding to the image forming apparatus 100 . Next, based on the image data 106 converted into CMYK, a pattern layer 310 is formed on the area where the concealing layer 306 is formed (FIG. 5(c)).

Next, in step S208, the antique color reproduction layer forming unit 113 forms the antique color reproduction layer 308 on the area corresponding to the portion of the gold leaf to be duplicated (that is, the area where the underlying layer 304 is exposed) (see FIG. 2). 5(d)). Here, the formation of the old-color reproduction layer may be performed based on the image data 106 of the cultural property digital image to be copied stored in the storage unit 101 . In this case, the images such as patterns (such as thinly applied ink), foil feet, stains, stains, scratches, flaking, wrinkle marks, sand, etc. that exist in the foil part of the digital image of the cultural property Separate from the color with a mask or the like. At the time of duplication, the separated image is printed on the base layer 304 as a pattern.

Alternatively, one or more general-purpose pattern images for representing stains and spots may be stored in advance, and the stains and spots may be colored with colors corresponding to the pattern images. Alternatively, a predetermined color may be prepared corresponding to stains without using the pattern image, and the exposed portion of the base layer 304 may be colored with this color.

Finally, in step S210, the mat layer forming section 116 forms the mat layer 312 on the exposed portion of the base layer 304, the antique color reproduction layer 308, and the pattern layer 310 (FIG. 5(e)).

In this way, a pattern layer printed with a pattern to be replicated is formed on the concealing layer, and a matte layer is formed on the pattern layer to give a texture, thereby making the foil portion of the gold folding screen shine. While maintaining the glossiness of the pattern portion due to the UV curable ink, it is possible to make the natural texture like Japanese paper.

In addition, by providing an antique color reproduction layer that reproduces the color of the gold folding screen in the area on the base layer corresponding to the gold leaf of the gold folding screen, it is possible to express the texture of the foil portion.

(Second embodiment)
FIG. 6 is a diagram showing the layer structure of the replica manufactured according to the second embodiment of the present invention. The layer structure shown in FIG. 6 is obtained by adding a second mat layer 305 to the entire surface of the underlying layer 304 in the layer structure shown in FIG. The second matte layer 305 is a layer formed by clear type UV curable matte varnish or matte ink, and has a lower matting agent concentration than the matte layer 312 (first matte layer).

In the layer structure shown in FIG. 6, the matte layer 312 (first matte layer) expresses the texture of the Japanese paper to be replicated and the gold foil thereon, and the second matte layer 305 expresses the metallic luster of the base layer 304 . It functions as a second control layer that acts as an eraser. The second matte layer 305 is formed using a mixture of matte varnish and gloss varnish, or a mixture of clear type and gloss type matte inks, and has a lower matting agent concentration than the matte layer 312 used on the surface. Hereinafter, the clear type of matte varnish or matte ink is abbreviated as "matte", and the clear type of gloss varnish or gloss ink is abbreviated as "gloss", and the mixing ratio of matte to gloss in the control layer will be described.

When matte alone is used (10:0 matte to gloss ratio), the underlayer 304 appears to be a light ocher with some sheen. If the gloss is more than 1:1, the texture of the gold leaf disappears and it becomes glossy like vinyl. When the matte:gloss mixture ratio is 9:1 to 1:1, a matte feeling can be produced without impairing the gold leaf feeling. More preferably, if the ratio is in the range of 3:1 to 1:1, the matte feeling can be more effectively produced without impairing the gold leaf feeling.

FIG. 7 is a flow chart showing the procedure of the method according to the present embodiment executed by the image forming apparatus 100. As shown in FIG. In the method according to the present embodiment, in the flowchart shown in FIG. Further includes step S203 forming 305 .

According to this embodiment, variations can be given to the luster of the foil portion.

(Third embodiment)
Next, a description will be given of a third embodiment in which a replica is manufactured using surface shape data to be replicated.

Referring to FIG. 1 again, the camera 2 according to this embodiment is configured as a stereo camera. The stereo camera is for acquiring imaging data to be duplicated, and the imaging device 5 is composed of a plurality of imaging units. From the difference in the projected position (parallax), the position and three-dimensional shape of the object to be replicated are recognized. The imaging device 5 moves in response to an instruction from the camera controller 6 and captures images to be duplicated from multiple directions. An image signal output from the imaging device 5 is converted into digital image data. As a result, digital image data for a plurality of images is stored in the storage device 7 of the camera 2 . In addition, the camera 2 extracts corresponding points from the image data converted as described above, obtains the difference in the position of the corresponding points on each image, and based on the information of the positional relationship of each imaging device grasped in advance. Then, the surface shape data of the object to be copied is obtained by the principle of triangulation, and the obtained surface shape data is stored in the storage device 7 . The stored shape data is composed of, for example, three-dimensional coordinate values of the extracted corresponding points.

A 3D scanner may be used as the camera 2 for acquiring the three-dimensional shape of the surface.

FIG. 8 is a block diagram showing the functional configuration of the image forming apparatus according to this embodiment. Image forming apparatus 800 shown in FIG. 8 has surface shape data 108 added to storage unit 104 of image forming apparatus 100 shown in FIG. A texture pattern forming unit 118 is added to the control unit 115 .

FIG. 9 is a diagram showing the layer structure of the replica manufactured according to this embodiment. The layered structure shown in FIG. 9 has a texture pattern 307 added on the concealing layer 306 in the layered structure shown in FIG. The texture pattern 307 is a pattern that expresses the unevenness of the pattern portion of the gold folding screen to be duplicated with white or clear UV curable ink. UV curable ink can be cured instantly, so thickness can be expressed by repeating printing and stacking ink layers. Further, unevenness can be expressed by changing the number of overcoatings according to the position.

The pattern layer 310 is affected by the unevenness expressed on the surface of the texture pattern 307 by performing normal printing without controlling the number of times of overpainting, and unevenness similar to the texture pattern 307 is formed on the surface. there is

With such a layered structure, it is possible to give the duplicate the texture of the historical cultural property to be duplicated.

FIG. 10 is a flow chart of the procedure of the method performed by the image forming apparatus 800 according to this embodiment.

First, in step S202, the acquisition unit 102 of the image forming apparatus 800 acquires the data of the cultural property digital image to be duplicated. In this embodiment, the acquired data includes image data 106 and surface topography data 108 . These data are stored in the storage unit 104 .

Next, the acquisition unit 102 converts the surface shape data into three-dimensional shape data representing a three-dimensional surface shape that can be processed by the printing unit 110 .

As a data format for such a three-dimensional shape, an STL (Standard Triangulated Language) format or the like is used. In the case of the STL format, data expresses a three-dimensional shape as a collection of small triangles, and is specifically constructed in the following format. One triangle is defined by a set of data from "X, Y, Z component values of the normal vector of the triangle" to "unused data". Repeated.

In subsequent processes, a duplicate is manufactured using a member having a base layer 304 provided on a base material 302 such as paper.

Acquisition unit 102 of image forming apparatus 800 receives image data, surface shape data, and printing instructions based on these data from terminal device 3 . Image forming apparatus 800 stores the received data in image data 106 and surface shape data 108 of storage unit 104 .

Next, the process proceeds to step S204, and the concealing layer forming unit 112 of the image forming apparatus 800 reads out the image data 106 conforming to the RGB standard stored in the storage unit 104. FIG. The concealing layer forming unit 112 determines whether each position on the base layer 304, for example, the position of each ink dot onto which the print head 111 ejects UV curable ink, is a gold foil area or a pattern area.

Then, when it is determined to be a pattern portion, a concealing layer 306 without unevenness is formed in a region corresponding to the pattern portion on the base layer 304 .

Here, the positional information defining the area where the concealing layer 306 is formed is stored in the storage unit 104 .

Next, in step S<b>205 , texture pattern forming section 118 reads the position information and surface shape data 108 stored in storage section 104 .

Next, a pattern that reproduces the texture expressed based on the read position information and the surface shape data 108 with a density difference of 0 to 100% is printed with white UV curable ink to form a texture pattern 307. . At this time, a texture is formed in which the density difference of 0% to 100% directly corresponds to the thickness of 0% to 100%. In this way, the texture pattern 307 can be formed by printing only one layer of white UV curable ink.

Basically, the texture can be formed in one output, but if the image forming apparatus 800 is a model capable of overprinting a plurality of times, the texture pattern 307 can be formed with a higher height difference by performing the printing a plurality of times. can be attached.

Since the processing after step S206 is the same as the procedure described in FIG. 4, the description is omitted.

In this way, a concealing layer without unevenness that conceals the metallic luster is formed in the area corresponding to the pattern portion of the gold folding screen on the base layer having metallic luster provided on the base material, and this concealing On the layer, a texture pattern expressing the texture to be replicated is formed with UV curable ink, and by forming a pattern layer on which the pattern to be replicated is printed on the texture pattern, the surface texture of the gold folding screen is created. can be reproduced.

In the above-described embodiment, the surface shape data to be duplicated is used to form the texture pattern 307, but one or more general-purpose surface shape data representing the texture of the surface of the gold folding screen may be stored in advance. Then, the texture pattern 307 may be formed based on this pattern image. Such processing also makes it possible to give the replica the delicate texture inherent in the ornament.

Next, an example of measuring the glossiness of a duplicate manufactured according to the second embodiment of the present invention will be described.

FIG. 11 shows the layer structure of the replica of the gold folding screen according to this example. The layer structure shown in the figure is as follows: Western gold leaf paper a, second mat layer b used for matting the gold leaf, masking layer c made of white UV curable ink, and pattern layer printed with the pattern. d1 and a first mat layer e that expresses the texture of Japanese paper or the like are laminated.

In the gold paint portion, the gold leaf paper a, the second mat layer b, the antique color reproduction layer d2 formed in the area corresponding to the stain of the gold leaf, and the first mat layer e are laminated from the bottom.
In addition, the gold leaf portion is laminated with the Western gold leaf paper a, the second mat layer b, and the antique color reproduction layer d-2.

Gloss measurements were taken at various measurement positions of such a layer structure. HORIBA's IG-330 was used as a glossiness measuring instrument. Table 1 below shows the measurement results.

In the table above, the glossiness was measured at two different locations on the pattern portion, which are indicated by pattern portions 1 and 2, respectively.

As for the measurement angle, a value of 60 degrees was used when the glossiness was less than 70%, and a value of 20 degrees was used when the glossiness was 70% or more.

As a comparative example, Table 2 below shows measurement results for a layer structure in which no mat layer is formed.

The item numbers on the left side of Table 2 above are given the item numbers corresponding to the measurement points in Table 1.

By comparing Table 1 (this example) and Table 2 (comparative example), the following can be said about the measurement results of this example.

(1) The glossiness is 100% or less in the entire area of the copy.

(2) The glossiness of the pattern portion is 10% or less. Further, the glossiness of the antique color reproduction layer is higher than the glossiness of the pattern portion.

In Table 2, the glossiness of pattern portion 1 is 45%. On the other hand, the glossiness of the pattern portion in Table 1 is 40% or less. In the case of reproducing the glossiness of the pattern portion at 30% or less in consideration of the texture of ornaments such as cultural assets, a configuration including a matte layer is more suitable. If the glossiness of the pattern portion is 20% or less, the pattern portion looks like matte paper or Japanese paper, and if it is 10% or less, a more matte feeling can be obtained.

(3) The glossiness of the antique color reproduction layer includes an area of 40% or less and an area of more than 40%. That is, in the area where the matte layer includes the first matte layer and the second matte layer, the glossiness of the antique color reproduction layer is 40% or less, and in the area where the matte layer includes only the second matte layer, the antique color reproduction The layer gloss is greater than 40%.

Therefore, according to this example, the texture of gold leaf in the area with high glossiness and the texture of Japanese paper in the area of low glossiness are obtained at the same time, and it can be said that the variation in texture is high.

In Table 2, the glossiness of the antique color reproduction layer is 56% or more. When the glossiness of the foil portion is to be reproduced at 50% or less in consideration of the texture of ornaments such as cultural assets, a configuration including a matte layer is suitable. If the glossiness of the foil portion is 40% or less, a more matte feeling can be visually obtained. Moreover, when reproducing the foil portion with a glossiness of 30% or less, a configuration including the first matte layer is more preferable. If the glossiness is 20% or less, a matte feeling is visually enhanced.

(Other embodiments)
In the above-described embodiment, the gold folding screen was used as an example to explain the method of replicating the original cultural property, but the present invention is not limited to gold leaf, and can be applied to objects to be replicated using silver leaf or other foil. Therefore, silver foil or other foil may be used for the base layer 304 to correspond to the foil stamped on the object to be replicated.

In the above-described embodiment, the first matte layer and the second matte layer are respectively used as examples of the first control layer that imparts texture and the second control layer that plays the role of matting the metallic luster. Although an example using them has been described, the configurations of the first control layer and the second control layer are not limited to these. The first control layer and the second control layer are not limited to matte layers, and various materials capable of controlling the glossiness to the value described in the embodiment can be used.

Aspects of the disclosure include the following.

(Appendix 1)
An image forming method for forming an image to be replicated having metallic luster by an inkjet method,
a step of providing an antique color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
and forming a texture imparting first matte layer on at least a portion of the antique color reproduction layer.

(Appendix 2)
The glossiness of the area where the first mat layer is formed on the antique color reproduction layer is 40% or less, and the glossiness of the other area on the antique color reproduction layer is greater than 40%. The described imaging method.

(Appendix 3)
3. The method according to appendix 1 or 2, further comprising forming a second matte layer on at least a portion of the base layer to suppress the gloss of the base layer before the step of providing the antique color reproduction layer. Imaging method.

(Appendix 4)
3. The image forming method according to appendix 3, wherein the second matte layer has a matting agent concentration lower than that of the first matte layer.

(Appendix 5)
5. The image forming method according to appendix 3 or 4, wherein the second mat layer is formed on the entire surface of the underlayer.

(Appendix 6)
6. The image forming method according to any one of appendices 1 to 5, wherein the glossiness of all the areas to be copied is 100% or less.

(Appendix 7)
An image forming method for forming an image to be replicated having a first region having metallic luster and a second region other than the first region by an inkjet method,
forming a masking layer for masking the metallic luster in a region corresponding to the second region on the base layer having the metallic luster provided on the substrate;
forming a pattern layer on which the pattern to be duplicated is printed on the concealing layer;
and forming a first control layer that imparts a texture on the picture layer so that the picture layer has a glossiness of 40% or less.

(Appendix 8)
a step of providing an antique color reproduction layer that reproduces the color to be replicated in a region corresponding to the first region;
forming the first control layer at least partially over the patina layer;
The glossiness of the area where the first control layer is formed on the antique color reproduction layer is 40% or less, and the glossiness of the other area on the antique color reproduction layer is greater than 40%. The described imaging method.

(Appendix 9)
9. The image forming method according to appendix 8, wherein the glossiness of the antique color reproduction layer is higher than the glossiness of the pattern layer.

(Appendix 10)
10. Any one of appendices 7 to 9, further comprising forming a second control layer on at least a portion of the underlayer to suppress gloss of the underlayer before forming the concealing layer. 1. The image forming method according to one.

(Appendix 11)
11. The image forming method according to appendix 10, wherein the second control layer has a matting agent concentration lower than that of the first control layer.

(Appendix 12)
12. The image forming method according to any one of appendices 7 to 11, wherein the pattern layer has a glossiness of 40% or less.

(Appendix 13)
13. The method according to any one of appendices 7 to 12, further comprising the step of forming a texture pattern expressing the texture of the object to be copied with ultraviolet curable ink on the concealing layer before the step of forming the pattern layer. The described imaging method.

(Appendix 14)
An image forming method for forming an image to be replicated having metallic luster by an inkjet method,
a step of providing an antique color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
forming a texture-imparting first control layer on at least a portion of the antique color reproduction layer, wherein the glossiness of the region in which the first control layer is formed on the antique color reproduction layer. is 40% or less, and the glossiness of other areas above the patina reproduction layer is greater than 40%.

(Appendix 15)
15. The imaging of Claim 14, further comprising forming a second control layer on at least a portion of the underlayer to suppress gloss of the underlayer prior to the step of providing the antique reproduction layer. Method.

(Appendix 16)
16. The image forming method according to appendix 15, wherein the second control layer has a matting agent concentration lower than that of the first control layer.

(Appendix 17)
A program that causes a computer to execute the image forming method according to any one of Appendices 7 to 16.

(Appendix 18)
An image forming apparatus for forming an image to be copied having a first area having a metallic luster and a second area other than the first area by an inkjet method,
a concealing layer forming means for forming a concealing layer that conceals the metallic luster in a region corresponding to the second region on the base layer having metallic luster provided on the substrate;
a pattern layer forming means for forming a pattern layer on which the pattern to be duplicated is printed on the concealing layer;
and texture imparting means for forming a control layer for imparting texture on the pattern layer to set glossiness of the pattern layer to 40% or less.

(Appendix 19)
An image forming apparatus for forming an image to be copied having metallic luster by an inkjet method,
an old-color reproduction layer forming means for providing an old-color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
and texture imparting means for forming a control layer that imparts texture on at least a portion of the antique color reproduction layer, wherein the glossiness of the area where the control layer is formed on the antique color reproduction layer is 40% or less. and the glossiness of other areas on the antique reproduction layer is greater than 40%.

Although embodiments of the present invention have been described above, the methods and apparatus described in the embodiments are exemplary only, and can be implemented in other manners. For example, the components described above are logical divisions of functionality, and implementations may divide the components in other manners. Also, two or more of the components described above may be integrated into one, or each of the components may physically exist separately.

Furthermore, the order of the method described above is an example, and the steps may be performed in a different order, and some steps may be performed simultaneously.

When the functions described in this embodiment are implemented in the form of software, a program for realizing the functions can be stored in a computer-readable storage medium. A program includes a number of instructions for directing a computer to function as all or part of the components described in this embodiment.

1 system 2 camera 3 terminal device 100, 800 image forming device 102 acquisition unit 103 input unit 104 storage unit 105 display unit 106 image data 108 surface shape data 110 printing unit 111 recording head 112 concealing layer forming unit 113 antique color reproduction layer forming unit 115 Control unit 114 Pattern layer forming unit 116 Matt layer forming unit 118 Texture pattern forming unit

Claims (20)

An image forming method for forming an image to be copied having a first area having metallic luster and a second area other than the first area by an inkjet method,
forming a masking layer for masking the metallic luster in a region corresponding to the second region on the base layer having the metallic luster provided on the substrate;
forming a pattern layer on which the pattern to be duplicated is printed on the concealing layer;
and forming a first mat layer that imparts texture on the pattern layer. a step of providing an antique color reproduction layer that reproduces the color to be replicated in a region corresponding to the first region;
The image forming method of claim 1, further comprising: forming a first matte layer over at least a portion of the antique reproduction layer. 2. The area where the first mat layer is formed on the antique color reproduction layer has a glossiness of 40% or less, and the other area on the antique color reproduction layer has a glossiness of more than 40%. The image forming method described in . 4. The image forming method according to claim 2, wherein the glossiness of the antique color reproduction layer is higher than the glossiness of the pattern layer. 5. The method according to any one of claims 1 to 4, further comprising forming a second matte layer on at least a portion of said base layer to suppress glossiness of said base layer before said step of forming said concealing layer. The image forming method according to item 1 or 1. 6. The image forming method according to claim 5, wherein the second mat layer has a matting agent concentration lower than that of the first mat layer. 7. The image forming method according to claim 5, wherein said second mat layer is formed on the entire surface of said base layer. 8. The image forming method according to claim 1, wherein the pattern layer has a glossiness of 40% or less. 9. The image forming method according to any one of claims 1 to 8, wherein glossiness of all areas to be copied is 100% or less. 10. The method according to any one of claims 1 to 9, further comprising, before the step of forming the pattern layer, forming a texture pattern representing the texture of the object to be copied with ultraviolet curable ink on the concealing layer. The image forming method described in . An image forming method for forming an image to be replicated having metallic luster by an inkjet method,
A step of providing an old-color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
and forming a texture imparting first matte layer on at least a portion of the antique color reproduction layer. A program that causes a computer to execute the image forming method according to any one of claims 1 to 11. An image forming apparatus for forming an image to be copied having a first area having a metallic luster and a second area other than the first area by an inkjet method,
concealing layer forming means for forming a concealing layer that conceals the metallic luster in a region corresponding to the second region on the base layer having metallic luster provided on the substrate;
a pattern layer forming means for forming a pattern layer on which the pattern to be duplicated is printed on the concealing layer;
and mat layer forming means for forming a mat layer on the pattern layer. An image forming apparatus for forming an image to be copied having metallic luster by an inkjet method,
An old-color reproduction layer forming means for providing an old-color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
and a matte layer forming means for forming a matte layer on at least part of the old color reproduction layer. A duplicate to be duplicated having a first region having metallic luster and a second region other than the first region, wherein a base layer having metallic luster is formed on a base material, and A masking layer for masking the metallic luster is formed on the ground layer in a region corresponding to the second region, and a pattern layer printed with the pattern to be replicated is formed on the masking layer, A reproduction in which a matte layer that imparts texture is formed on a picture layer. A duplicate of a target to be duplicated having a metallic luster, wherein a base layer having a metallic luster is formed on a base material, and an antique color reproduction layer that reproduces the color of the target to be duplicated is formed on the base layer, A duplicate in which a matte layer is formed at least partially on the antique color reproduction layer. An image forming method for forming an image to be copied having a first area having metallic luster and a second area other than the first area by an inkjet method,
forming a masking layer for masking the metallic luster in a region corresponding to the second region on the base layer having the metallic luster provided on the substrate;
forming a pattern layer on which the pattern to be duplicated is printed on the concealing layer;
An image forming method, comprising: forming a first control layer that imparts a texture on the picture layer so that the picture layer has a glossiness of 40% or less. An image forming method for forming an image to be replicated having metallic luster by an inkjet method,
A step of providing an old-color reproduction layer that reproduces the color of the object to be reproduced on an underlayer having metallic luster provided on a base material;
and forming a texture imparting first control layer on at least a portion of the antique color reproduction layer, wherein the glossiness of the region in which the first control layer is formed on the antique color reproduction layer. is 40% or less, and the glossiness of other areas on said patina reproduction layer is greater than 40%. A duplicate to be duplicated having a first region having metallic luster and a second region other than the first region, wherein a base layer having metallic luster is formed on a base material, and A masking layer for masking the metallic luster is formed on the ground layer in a region corresponding to the second region, and a pattern layer printed with the pattern to be replicated is formed on the masking layer, A duplicate, wherein a control layer for imparting texture is formed on a picture layer, and the picture layer has a glossiness of 40% or less. A duplicate of a target to be duplicated having a metallic luster, wherein a base layer having a metallic luster is formed on a base material, and an antique color reproduction layer that reproduces the color of the target to be duplicated is formed on the base layer, A control layer that imparts texture is formed on at least a portion of the antique color reproduction layer, and the glossiness of the region in which the control layer is formed on the antique color reproduction layer is 40% or less, and the antique color reproduction Glossiness of other areas on the layer is greater than 40%, replica.

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