JP6274663B2 - Anti-counterfeit medium and method for producing the same - Google Patents

Description

  The present invention relates to an anti-counterfeit medium having confidential information to be used for preventing counterfeiting and duplication of valuable printed matter such as banknotes, passports, securities, product tags, and various certificates, and a method for producing the same.

  Conventionally, many anti-counterfeiting measures that can perform true / false discrimination without using a discriminating tool have been applied to valuable printed matter in order to easily determine the authenticity. For example, a lot of squeezing that can be distinguished by transparency, minute characters that can be judged by the naked eye, and the like are provided. In addition, a lot of glossy materials such as pearl ink and transparent ink, which can be determined by the difference in gloss accompanying the change in observation angle, are provided.

  However, since the output device and material of the glossy material are different from process ink and ink jet ink such as cyan and magenta, it is necessary to separately prepare a material and an output device for printing. Therefore, compared with the case of forming ordinary printed matter, it takes time and cost, so there is no need to prepare materials and output devices separately, and printing materials and output such as ordinary process inks such as cyan and magenta and inkjet inks are output. There is a need for a technique for providing a glossy image using an apparatus.

  For example, as a printed matter in which a latent image having a gloss due to a change in observation angle is formed using a laser printer and toner without using a transparent toner, Patent Document 1 discloses a gloss image on a base material as a toner. After applying the background area around the glossy image with a laser printer at a toner amount of 50%, the toner is heated and melted at the fixing portion to form on the substrate. Next, a printed matter formed by applying the remaining toner amount 50% of the background area onto the background area by a laser printer and heating and melting the toner in the fixing unit is disclosed.

  The gloss image that has passed through the fixing unit twice is heated and melted twice, so that the surface becomes flat and gloss is higher than the background area that has passed through the fixing unit only once. Therefore, when viewed from the front, the glossy image and the surrounding background area have the same amount of toner, so the density is visually recognized as a uniform density area. The glossy image becomes visible as a latent image.

JP 2011-39396 A

  Patent Document 1 makes it possible to form a glossy image using toner. However, in Patent Document 1, it is necessary to form a glossy image as a flat shape by printing the toner twice and then fusing it twice at the fixing unit. Therefore, the material to be used is limited to the toner, and further, the printer is limited to an output machine having a fixing unit capable of melting the toner.

  Therefore, an object of the present invention is to propose an anti-counterfeit medium having a latent image that can be produced by changing the observation angle, and a production method thereof, which can be produced without limiting the ink and the printing press.

  In order to achieve the above-mentioned object, the invention according to claim 1 is an ink receiving region having a printed pattern of a color different from that of a substrate formed by laminating a camouflage image and a latent image on at least a part of the substrate. The camouflage image has a pattern portion of a color different from that of the base material formed of at least the first ink, and a background portion formed around the pattern portion is formed of at least a second ink of a color different from that of the base material. The latent image is formed of a third ink having the same shape and the same size as the pattern portion, and the same size as the background portion, and a different color from the base material, and the background portion is laminated under diffuse reflected light. The pattern portion and the latent image are the same color as each other, and under the regular reflection light, the pattern portion and the latent image that are stacked and the background portion are the latent image based on the difference in the reflected light with respect to the same incident light. Forgery characterized by being visible A stop media.

  The invention according to claim 2 is the anti-counterfeit medium according to claim 1, wherein the first ink, the second ink, and the third ink have the same color.

  The invention according to claim 3 is the anti-counterfeit medium according to claim 1, wherein the pattern portion and the background portion are formed of at least two colors of ink.

  In the invention according to claim 4, the printed pattern is a color gradation image, and the latent image is a gradation image. Between the pattern portion and the background portion, the substrate and the background portion are provided. The anti-counterfeit medium according to claim 3, wherein a gradation camouflage portion formed of at least a fourth ink of different colors is disposed, and the pattern portion and the latent image are formed of inks of different colors. is there.

The invention according to claim 5 is a method for producing the forgery prevention medium according to claim 4, wherein the print pattern data is an original image of a print pattern and the latent image data is an original image of the latent image. A position that is common position information for a plurality of separated image data and latent image data, and an image data acquisition step for creating a plurality of separated image data by color-separating print pattern data. After setting the coordinates, among the plurality of decomposed image data, a step of overlapping the concealed decomposed image data and the latent image image data for concealing the latent image image data to remove overlapping portions, and creating concealing camouflage image data; the color of the latent image data, and set to the same color as the concealing separation image data, comprising the steps of making the color settings latent image data, and concealment for camouflage image data, hidden Was not used in making the camouflage image data have to synthesize the remainder of each separation image data, comprising the steps of producing a camouflage image data, output to output the laminated camouflage image data and the color setting latent image data It is a manufacturing method of the forgery prevention medium characterized by providing a step.

  Further, the invention described in claim 6 is the method for producing a forgery prevention medium according to claim 5, further comprising the step of forming an ink receiving area on the substrate before the output step.

  The anti-counterfeit medium having a latent image of the present invention is caused by a difference in diffusibility between the laminated portion and other portions, which is generated by laminating and printing the ink for forming the latent image on the ink receiving area. A visible latent image is formed by changing the observation angle. Therefore, since it can form without limiting to an ink and a printing machine, it becomes possible to produce at a very cheap price rather than the printed matter which has the conventional glossy image.

The top view which shows one Example of a forgery prevention medium (S1). The top view explaining a printing pattern (2). FIG. 3 is a schematic diagram illustrating a cross section of an ink receiving area (Z) in X1-X1 ′ of FIG. 2. The top view which shows the structure of a camouflage image (3) and a latent image (6). The top view which shows the pattern part (4) and background part (5) of a solid area | region. The top view which shows an example of arrangement | positioning of a pattern part (4) and a background part (5). The figure which shows the shape of a camouflage element (3a) and a latent image element (6a). The schematic diagram which shows the difference of the diffusivity of the pattern part (4) and latent image (6) which were arrange | positioned and arrange | positioned, and a background part (5). The schematic diagram and top view explaining the visual recognition state of a printing pattern (2). The top view explaining the other structure of a printing pattern (2). The top view explaining the structure which used the printing pattern (2 '') and the latent image (6 '') as the gradation image. The schematic diagram and top view explaining the visual recognition state of a printing pattern (2 ''). The block diagram which shows the production apparatus (M) of a medium (S3). The flowchart which shows the preparation methods of the medium (S3) which has a printing pattern (2 ''). FIG. 5 is a schematic diagram illustrating color separation step ST2. The schematic diagram explaining the setting of a position coordinate. The schematic diagram which shows the preparation process of the camouflage image data (7D) for concealment. The schematic diagram which shows the color separation of a printing pattern (2 ''). The schematic diagram which shows camouflage image data production step ST5. The schematic diagram which shows camouflage image data (3D) and latent image image data (6D).

  Embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments to be described below, and various other embodiments can be implemented within the scope of the technical idea described in the claims.

  FIG. 1 is a plan view showing an example of an anti-counterfeit medium (hereinafter referred to as “medium”) (S1) according to the present invention.

The medium (S1) is, for example, valuable printed matter such as banknotes, securities, passports, identification cards,
A printed pattern (2) having a color different from that of the substrate (1) is provided in at least a part of the ink receiving area (Z) on the printable substrate (1) such as paper or a plastic card. The printed pattern (2) is visually recognized as one image under diffusely reflected light, but has confidential information that can be visually recognized under regular reflected light. In the present invention, the reflected light at the time of regular reflection is referred to as “regular reflection light”.

  FIG. 2 is a plan view for explaining the printed pattern (2). The printed pattern (2) represents meaningful information such as letters, numbers, and patterns, and in FIG. The printed pattern (2) is formed by laminating a camouflage image (3) and a latent image (6) in the ink receiving area (Z).

  The ink receiving area (Z) is an area for diffusing ink for forming the printed pattern (2), and is formed, for example, by applying a coating liquid mainly composed of a porous extender pigment. FIG. 3 is a schematic diagram for explaining a cross section of the ink receiving area (Z) in X1-X1 ′ of FIG. 2, as shown in FIG. 3 (a), a substrate having no ink receiving area (Z) ( 1) When the printed pattern (2) is printed on the ink, the ink for forming the printed pattern (2) is deposited on the substrate (1) and then cured.

  On the other hand, as shown in FIG. 3B, when the printed pattern (2) is printed on the substrate (1) having the ink receiving area (Z), the ink forming the printed pattern (2) It adheres on the material (1), is dispersed inside the ink receiving area (Z), and then hardens.

  Although the details of the principle will be described later, in the present invention, the number of times of printing in the ink receiving area (Z) is different between the laminated portion and other portions by adopting a laminated structure. The number of times of printing is the number of times ink is applied to the ink receiving area (Z) and cured, and is hereinafter referred to as “number of times of printing”. As a result, the printed pattern (2) that is visually recognized as one image under diffuse reflected light is a latent image (6) that is printed differently from other places in the ink receiving area (Z) under regular reflected light. ) Becomes visible. Therefore, the printed pattern (2) needs to be formed in the ink receiving area (Z).

  Examples of porous extender pigments that produce the ink receiving area (Z) include white pigments such as alumina white, talc, calcium carbonate, barium sulfate, calcium sulfate, diatomaceous earth, and calcium silicate. 10-25% by weight is printed with offset ink dispersed in, for example, a medium for offset (including rosin-modified phenolic resin, soybean oil, linseed oil, mineral oil, etc., and additives such as a dryer and an oxidation inhibitor) The ink receiving area (Z) having a thickness of about 1 to 5 μm can be obtained.

  Instead of the offset medium, gravure medium, screen printing, roll coating, or the like can be used for printing or coating by the respective methods.

  Next, the configurations of the camouflage image (3) and the latent image (6) will be described. FIG. 4 is a plan view showing configurations of the camouflage image (3) and the latent image (6). A camouflage image (3) shown in FIG. 4A1 includes a pattern portion (4) and a background portion (5) arranged around the pattern portion (4).

  The camouflage image (3) represents meaningful information such as letters, numbers, and patterns due to the different density or color of the pattern portion (4) and the background portion (5). In FIG. The part “4” represents the letter “P”.

As shown in the enlarged view of FIG. 4 (a2), the camouflage image (3) is formed by arranging camouflage elements (3a) formed of ink of a color different from that of the substrate (1) in a line shape. Alternatively, as shown in the enlarged view of FIG. 4 (a3) , the camouflage elements (3a) are arranged in a matrix.

  The pattern portion (4) is formed of at least a first ink having a color different from that of the substrate (1). The pitch for arranging the camouflage element (3a) and the latent image element (6a) described later is appropriately set within a range of 3000 μm or less in consideration of the size of the print pattern (2), the printing method, and the element width (W3). Is done.

  When the pitch exceeds 3000 μm, more substrate (1) is exposed than when the pitch is small. Therefore, depending on the base material (1) to be used, the visibility of the latent image (6) is lowered due to the influence of the diffusibility of the base material (1) in the regular reflection light, which is not preferable.

  In FIG. 4, the camouflage elements (3a) are arranged at a constant pitch, but a part of the camouflage elements (3a) may be different from each other as long as they are within the above-described range.

  When the pitch for arranging the camouflage elements (3a) is less than 100 μm, the plurality of camouflage elements (3a) are arranged without a gap as shown in FIG. The pattern portion (4) and the background portion (5) that form a) are both visually recognized as a solid region.

  The image line width (W3) of the camouflage element (3a) and the image line width (W4) of the latent image element (6a) described later can be appropriately set within a range of 20 to 2000 μm.

  When the line width (W3, W4) of each element (3a, 4a) is less than 20 μm, the visibility of the printed pattern (2) is deteriorated depending on the concentration of ink used. Further, it is difficult to stack the pattern portion (4) and the latent image (6), which is not preferable.

  When the line width (W3, W4) of each element (3a, 4a) exceeds 2000 μm, the pattern portion (4) and the latent image (6) arranged in a stacked manner and the background portion (5) The difference in diffusibility is not preferable because it is visible with the naked eye.

  A background part (5) is an area | region arrange | positioned around a pattern part (4), and is formed with the at least 2nd ink of a color different from a base material (1). The background portion (5) is arranged around the pattern portion (4) in order to conceal the shape of the pattern portion (4) having the same shape and the same size as the latent image (6) under diffuse reflected light. Need to be placed.

  The color of the ink forming the pattern portion (4) and the background portion (5) may be the same color or different, but in order to conceal the latent image (6) under diffuse reflected light, the pattern portion ( 4) and the background image (6) need to be the same color where the latent image (6) is laminated.

  For example, when the pattern portion (4) is blue and the latent image (6) is yellow, the background portion (5) is blue and yellow, which are the pattern portion (4) and the latent image (6). The green color is the same as that of the laminated layer. When the camouflage image (3) and the latent image (6) are laminated, the pattern portion (4) and the latent image (6) formed by twice printing are visually recognized in green. Further, the background portion (5) once formed by printing is also visually recognized in green. Note that “one-time printing” means that the number of times of printing is one, and “twice-time” means that the number of times of printing is two. Therefore, the printed pattern (2) is visible as a uniform green color as a whole, and the latent image (6) is hidden. Each ink may be composed of a plurality of types of ink.

  Further, when the printed pattern (2) is formed with one kind of ink, the color obtained by laminating the pattern portion (4) and the latent image (6) and the color of the background portion (5) are made the same color. In addition, the density at which the pattern portion (4) and the latent image (6) are stacked and the density at the background portion (5) are the same.

  For example, the first ink that forms the pattern portion (4), the second ink that forms the background portion (5), and the third ink that forms the latent image (6) are replaced with one type of ink of the same color. The pattern portion (4) is formed at a density of 50, the latent image (6) is formed at a density of 50, and the background portion (5) is formed at a density of 100. Thereby, when the camouflage image (3) and the latent image (6) are laminated, the whole can be visually recognized as a uniform blue color having a density of 100.

  Furthermore, the ink which forms a pattern part (4) and a background part (5) may contain the fluorescent material. The fluorescent material is a fluorescent pigment or fluorescent dye that emits visible light when irradiated with ultraviolet rays or infrared rays. By including the fluorescent material in the ink, in addition to the effect of making the latent image (6) visible under the specular reflection light described above, the pattern portion (4) or the background portion (5) under the excitation light of the fluorescent material. ) Becomes fluorescent and becomes visible.

  The ink for forming the pattern portion (4) and the background portion (5) may be any ink that can be fixed in the ink receiving area (Z). For example, the toner used in a laser printer or an ink jet printer may be used. Process ink used.

  The arrangement of the pattern portion (4) and the background portion (5) is not limited to the arrangement shown in FIG. 3, and the shape of the pattern portion (4) having the same shape as that of the latent image (6) is not limited to the arrangement shown in FIG. Any arrangement that can be concealed can be set as appropriate.

  FIG. 6 is a plan view showing an example of the arrangement of the pattern portion (4) and the background portion (5). As shown to Fig.6 (a), you may arrange | position a background part (5) so that a part of pattern part (4) may adjoin. Moreover, as shown in FIG.6 (b), not only one pattern part (4) may be arrange | positioned. Furthermore, as shown in FIG. 6C, the pattern portion (4) may be arranged around the background portion (5), and the arrangement may be opposite to that in FIG.

  The latent image (6) shown in FIG. 4 (b1) is an image that can be viewed under regular reflection light, and has the same shape and the same size as the pattern portion (4). The details of the visual recognition will be described later, but the same-shaped latent image (6) is laminated and arranged on or below the pattern portion (4), and the background portion (5) is tipped around it. By arranging them together, the pattern portion (4) and the latent image (6) arranged in a stacked manner and the surrounding background portion (5) are visually recognized in the same color under diffuse reflected light. The latent image (6) can be hidden.

  On the other hand, under regular reflection light, the number of times of printing on the base material (1) is different between the pattern portion (4) and the latent image (6) arranged in layers and the background portion (5) around the pattern portion (4). The latent image (6) becomes visible due to the difference in reflected light with respect to the same incident light.

  As shown in the enlarged view of FIG. 4 (b2), the latent image (6) has a latent image element (6a) formed of at least a third ink having a color different from that of the substrate (1). As shown in the enlarged view of FIG. 4 (b3), the latent image elements (6a) are arranged in a matrix. The inks forming the camouflage image (3) and the latent image (6) may be the same color or different colors. Hereinafter, the camouflage image (3) and the latent image (6) will be described as the same color ink.

  In the present invention, each of the camouflage element (3a) and the latent image element (6a) is at least one of an image line, a point, and a pixel, or a combination thereof. FIG. 7 is a diagram showing the shapes of the camouflage element (3a) and the latent image element (6a), and is a plan view showing the camouflage element (3a) as an example.

  The image line is a straight line, a broken line, a wavy line, or a broken wavy line as shown in FIGS. 7A, 7B, 7C, and 7D. A point is a point formed on a printed material by a mesh screen, a contact screen, or the like. A plurality of dots and pixels to be described later are arranged in a straight line or a wavy line to form a point group or a pixel group.

  When the camouflage elements (3a) configured in a line shape by forming a point group or a line group are arranged in a line, the camouflage image (3) shown in FIG. 4 (a1) is obtained. The dot shape is not limited to a circular dot, but a random dot or a special halftone dot generation method proposed in Japanese Patent Application Laid-Open No. 11-268228 previously filed by the applicant of the present application is taken into consideration. A special halftone dot shape having a degree of freedom obtained by converting an input image into halftone dots consisting of halftone screens may be used.

  A pixel is a minimum unit obtained by dividing a two-dimensional image such as a figure or a character by vertical and horizontal lines. The pixel shape is circular, elliptical, as shown in FIGS. 7 (e), 7 (f), 7 (g), 7 (h), 7 (i) and 7 (j). Polygonal shape and character shape. The character shape shown in FIG. 7H is generally called a minute character or a special halftone dot, but is a pixel in the present invention. Further, as shown in FIGS. 7 (i) and 7 (j), the elements may be combined with image lines, points, and pixels, respectively.

  In addition, it is preferable to form the element which comprises the pattern part (4) and latent image (6) arrange | positioned by lamination | stacking by the element of the same shape. When the pattern portion (4) and the latent image (6) are formed of elements having different shapes, the latent image (6) may be visible under diffuse reflected light, which is not preferable. Hereinafter, in the present embodiment, the camouflage element (3a) and the latent image element (6a) will be described as linear image lines shown in FIG.

  Next, the principle of causing a difference in diffusivity due to the number of times of printing of the pattern portion (4) and the latent image (6) arranged in a stacked manner and the surrounding background portion (5) will be described. .

  FIG. 8 is a schematic diagram showing a difference in diffusibility between the pattern portion (4) and the latent image (6) and the background portion (5) arranged in a stacked manner, and FIG. It is an enlarged view in X1-X1 'cross section. In addition, the diffusibility in this embodiment is reflected light when diffusely reflected light is incident. Thus, the difference in diffusivity means that the amount of reflected light differs when the same amount of diffusely reflected light is incident from the same angle. Hereinafter, the incidence of diffusely reflected light having the same light amount from the same angle is referred to as identical incident light.

  As shown in FIG. 8A, the printed pattern (2) is obtained by printing the pattern part (4) and the background part (5) in the ink receiving area (Z) formed on the substrate (1). The latent image (6) is printed on the pattern portion (4). That is, in the printed pattern (2), a region formed by printing once and a region formed by printing twice are mixed. As shown in FIG. 8A, the background portion (5) once formed by printing is applied without scattering of ink in the ink receiving region (Z).

  In addition, scattering in the present invention refers to whether or not ink is distributed in the vertical direction with respect to the thickness (h1) of the ink receiving region (Z). It is assumed that the background portion (5) is not scattered because the ink is distributed at the same position in the vertical direction with respect to the thickness (h1).

  On the other hand, the ink distribution in the ink receiving area (Z) is scattered in the area where the pattern portion (4) and the latent image (6) are formed by being printed twice. Specifically, it is assumed that the ink is scattered because the ink is distributed at different positions in the vertical direction with respect to the thickness (h1) of the ink receiving region (Z).

  As shown in FIG. 8 (b1), when the background part (5) formed by printing once is irradiated with a light source (R1) such as a fluorescent lamp at 45 degrees (α1), it is 45 degrees during regular reflection. In the vicinity (α2), strong reflected light (R2) is returned. This is because the ink is not scattered in the ink receiving area (Z), so that the light is reflected without being diffused with respect to the incident light.

  On the other hand, as shown in FIG. 8 (b2), the region where the pattern portion (4) and the latent image (6) are laminated and formed by printing twice is the same as in FIG. 8 (b1). When the light source (R1) is irradiated at 45 degrees (α1), weak light (R2) is returned during regular reflection. This is because light is diffused during regular reflection due to the scattering of the ink distribution in the ink receiving area (Z). In other words, the region where the pattern portion (4) and the latent image (6) formed by being printed twice are stacked and disposed under the specularly reflected light from the background portion (5) formed once by printing. Since the diffusibility is high, a difference occurs in the amount of reflected light with respect to the same incident light.

  Therefore, the printed pattern (2) of the present invention includes a background portion (5) formed by printing once under regular reflection light, and a pattern portion (4) and latent image (6) formed by twice printing. ) Are different from each other in the diffusibility of the region where the layers are arranged, the difference in the amount of reflected light with respect to the same incident light occurs, and the background portion (5) formed by printing once is formed by printing twice Since the part (4) and the latent image (6) are viewed brighter than the area where the stacked images are arranged, the latent image (6) can be viewed by the difference in brightness.

  The printed pattern (2) of the present invention is a pattern in which the background portion (5) is formed by printing once, and the pattern portion (4) and the latent image (6) arranged in a stacked manner are formed by printing twice. However, the present invention is not limited to this as long as there is a difference in the number of times of printing. For example, the background portion (5) is formed twice and the pattern portion (4) and the latent image (6) are printed three times. It may be formed.

  Moreover, if the pattern part (4) and the latent image (6) are arranged in a stacked manner, there is no limitation in the order of the lamination, and the pattern part (4) is laminated on the latent image (6). Also good.

  Next, the visual recognition state of the printed pattern (2) which consists of the above structure is demonstrated using FIG. FIGS. 9A1 and 9A2 are a schematic view and a plan view when the printed pattern (2) shown in FIG. 2 is observed under diffuse reflected light, and FIGS. b2) is a schematic view and a plan view when the printed pattern (2) of FIG. 2 is observed under specular reflection light.

  In FIG. 9, when the camouflage image (3) and the latent image (6) were formed with the same color ink, the medium (S1) was observed under diffuse reflected light as shown in FIG. 9 (a1). At this time, since the pattern portion (4) and the latent image (6) arranged in a stacked manner and the background portion (5) around the pattern portion (4) and the latent image (6) are formed with the same color ink, they are visually recognized with the same color with the naked eye. Thus, the latent image (6) and the background (5) cannot be distinguished and visually recognized. Therefore, as shown in FIG. 9A2, the printed pattern (2) is visually recognized as an image having a uniform density.

  Further, as shown in FIG. 9 (b1), when the medium (S1) is observed under specular reflection light, the background portion (5) formed by printing once as described above has low diffusibility. Visible brightly. On the other hand, the region where the pattern portion (4) formed by twice printing and the latent image (6) are laminated has a higher diffusibility than the background portion (5), and is therefore darkly visible. Therefore, under regular reflection light, as shown in FIG. 9 (b2), the letter “P”, which is the latent image (6), is visible due to the difference in brightness.

  As described above, the medium (S1) is formed on the ink receiving area by differently printing the latent image (6) and the surrounding background portion (5), such as printing once and twice. The latent image (6) becomes visible due to the difference in diffusivity. Therefore, since the medium (S1) can be formed without being limited to ink and a printing press, it can be easily produced at a lower cost than conventional prints in which a latent image appears by tilting. It becomes.

  Next, another configuration of the printed pattern (2) will be described.

  FIG. 10 is a plan view illustrating another configuration of the printed pattern (2). As shown in FIG. 2, the print pattern (2) described above has a camouflage image (3) and a latent image (6) formed with a single color ink, but each image is formed with a plurality of colors of ink. May be.

  The printed pattern (2 ′) shown in FIG. 10 has a background area (2b) of a color different from that of the meaningful area (2a) around the meaningful area (2a) of the character “J” as the meaningful information. It is a configuration. The printed pattern (2 ′) is visually recognized as one image composed of the red letter “J”, which is the meaningful area (2a), and the blue background area (2b) under diffuse reflection light. Similar to the printed pattern (2), the camouflage image (3 ′) and the latent image (6 ′) are laminated in the ink receiving area (Z).

  The camouflage image (3 ′) includes a pattern portion (4 ′) and a background portion (5 ′) arranged around the pattern portion (4 ′). The pattern portion (4 ′) and the background portion (5 ′) Significant information such as letters, numbers, patterns, and the like is represented by the difference in density or color. In FIG. 10, the letter “P” is represented by the pattern portion (4 ′). The latent image (6 ') is an image that can be visually recognized under specular reflection light, and has the same shape as the pattern portion (4).

  In order to conceal the latent image (6 ′) under diffuse reflected light, the color obtained by laminating the pattern portion (4 ′) and the latent image (6 ′) and the color of the background portion (5 ′) are the same color. It is necessary to. In the present invention, the color difference between the pattern portion (4 ′) and the latent image (6 ′) and the surrounding background portion (5 ′) arranged in a stacked manner is the printed pattern (2 It is said that it is visually recognized in the same color even in a state that cannot be identified with the naked eye in ').

  Therefore, the latent image (6 ′) is similar to the printed pattern (2) described above, in which the pattern portion (4 ′) and the latent image (6 ′) are laminated, the background portion (5 ′), and the like. Form in color.

  For example, when the printed pattern (2 ′) is formed of a meaningful area (2a) that is red with a density of 100 and a background area (2b) that has a density of blue of 100, of the pattern portion (4 ′), The portion (4a ′) that is layered with the latent image (6 ′) to become a meaningful area (2a) is red with a density of 50, and is layered with the latent image (6 ′) to form the background area (2b). The location (4b ′) is blue with a density of 50.

  Further, in the background part (5 ′), the part (5a ′) that becomes a part of the meaningful area (2a) has a red density of 100, and the part (5b ′) that becomes a part of the background area (2b). Is blue density 100.

  Further, in the latent image (6 ′), a portion (6a ′) which is stacked with the pattern portion (4 ′) to become a meaningful area (2a) is formed with a red density 50, and the pattern portion (4 ′) ) To form a background region (2b) (6b ′) with a blue density of 50. As a result, when the camouflage image (3 ′) and the latent image (6 ′) are laminated, a meaningful area (2a) having a red density of 100 and a background area (2b) having a blue density of 100 are obtained under diffuse reflection. ) Is visually recognized.

  In addition, when the medium (S2) is observed under specular reflection light, the background portion (5 ′) formed by printing once is visually recognized brightly and has a pattern portion formed by printing twice because of low diffusion. The region where (4 ′) and the latent image (6 ′) are laminated has a higher diffusibility than the background portion (5 ′), and is therefore darkly visible.

  Therefore, under regular reflection light, the letter “P”, which is the latent image (6 ′), is visible in the printed pattern (2 ′) due to the difference in brightness.

  As described above, by changing the meaningful information visually recognized under diffuse reflected light and the shape of the latent image (6 ′), the image can be changed between diffuse reflected light and regular reflected light. Is possible.

  In FIG. 10, the printed pattern (2 ′) is composed of a meaningful area (2a) having a letter “J” shape made of red ink and a background area (2b) made of blue ink. If the back-printed background part (5 ′), the twice-printed pattern part (4 ′), and the latent image (6 ′) have different diffusibility under regular reflection light, the face It is possible to obtain a desired image such as an image, a gradation image such as a landscape, or a color image using a plurality of colors of ink.

  Next, a configuration in which the printed pattern (2) is a gradation image will be described.

  FIG. 11 is a plan view illustrating a configuration in which the printed pattern (2 ″) and the latent image (6 ″) are both grayscale images.

  The printed pattern (2 ″) shown in FIG. 11 is a color gradation image composed of three colors of inkjet inks of yellow, magenta, and cyan. In the printed pattern (2 ″), under the diffusely reflected light, a rose flower which is a color image is visually recognized. As in the printed pattern (2, 2 ′) described above, , And divided into regions formed by twice printing.

  When the printed pattern (2 ″) is a color gradation image and the latent image (6 ″) is a gradation image, the camouflage image (3 ″) has a pattern portion (4 ″) and a background portion. Further, a gradation camouflage portion (7) is arranged between (5 ″) and adjacent to the pattern portion (4 ″).

  The gradation camouflage part (7) has the same diffusibility as the background part (5 ″) in diffuse reflection light, and is at least a fourth color different from the base material (1) and the background part (5 ″). It is made of ink.

  As a result, the background portion (5 ″) and the gradation camouflage portion (7) cannot be distinguished from each other under diffuse reflected light, and the color formed on the periphery of the pattern portion (4 ″). It is visually recognized as one background area having gradation. In addition, the pattern portion (4 ″) and the latent image (6 ″), which are arranged in a stacked manner, have a diffusibility with the gradation camouflage portion (7) and the background portion (5 ″) which are the surroundings. By being different, the latent image (6 ″) is visually recognized in the same manner as the printed pattern (2, 2 ′) described above.

  Next, the visual recognition state of the printed pattern (2 ″) will be described with reference to FIG. 12 (a1) and 12 (a2) are a schematic view and a plan view when the printed pattern (2 ″) shown in FIG. 11 is observed under diffuse reflected light. FIG. 12 (b1) and FIG. 12 (b2) is a schematic view and a plan view when the printed pattern (2 ″) of FIG. 11 is observed under specular reflection light.

  As shown in FIG. 12 (a2), when the medium (S3) is observed under diffusely reflected light, the background portion (5 ″), the gradation camouflage portion (7), and the pattern portion (4 ″) However, since the diffusivity is the same, it cannot be distinguished with the naked eye. Therefore, as shown in FIG. 12A2, the printed pattern (2 ″) is visually recognized as a color gradation image.

  As shown in FIG. 12 (b1), when the medium (S3) is observed under specular reflection light, the background portion (5 ″) and the gradation camouflage portion (7) formed once by printing as described above. ) Is visually recognized with the same brightness because of the same diffusivity. On the other hand, the region where the pattern portion (4 ″) and the latent image (6 ″) formed by twice printing are laminated is more diffusive than the background portion (5 ″) and the gradation camouflage portion (7). Is so dark that it is visible darkly.

  Therefore, under regular reflection light, as shown in FIG. 12 (b2), the latent image (6 ″), which is a gradation image, can be visually recognized in the printed image (2 ″) due to the difference in brightness. Become.

  Next, a method for manufacturing the above-described medium (S3) will be described.

FIG. 13 is a block diagram showing a production apparatus (M) for the medium (S3). The manufacturing apparatus (M) includes at least an input unit (U1), an editing unit (U2), a storage unit (U3), and a printing unit (U4).

  The input unit (U1) is a means for acquiring data necessary for producing the medium (S3) and sending it to the editing unit (U2).

  The editing unit (U2) stores the sent data in the storage unit (U3), performs all of the arithmetic processing, image processing, and the like necessary for the production of the medium (S3), and outputs the obtained results to the printing unit ( Send to U4).

  The storage unit (U3) is a means for storing various data necessary for the calculation of the editing unit (U2) and the calculation results thereof as data necessary for producing the medium (S3).

  The printing unit (U4) is means for printing the data given from the editing unit (U2) to obtain the medium (S3). For the printing unit (U4), a printing device such as a laser printer, an inkjet printer, or an offset printing machine that can print ink on the ink receiving area (Z) described above is used.

  The medium (S3) can be produced by the input unit (U1), the editing unit (U2), the storage unit (U3), and the printing unit (U4) described above, but the medium (S3) is printed using the image data. In order to do so, a communication interface (U5) and a display body (U6) can be further provided.

  The communication interface (U5) connects a computer terminal (not shown) and the editing unit (U2), and transfers information between the computer terminal and the editing unit (U2) as necessary. For example, the communication interface (U5) can obtain various data necessary for producing the medium (S3) such as images and texts from an external database server registered in advance.

  The display unit (U6) is a means for displaying information necessary for the creator, such as input data, calculation results, data necessary for production of the medium (S3), input conditions, commands, etc. For example, CRT, liquid crystal At least one display or the like is provided.

  FIG. 14 shows the procedure of the method for producing the medium (S3) having the printed pattern (2 ″) as the color gradation image shown in FIG. 11 using the production apparatus (M) of FIG. It demonstrates using the flowchart of these.

  First, as image data acquisition step ST1, print pattern data (2D) that is an original image of a print pattern (2 ″) and latent image data (6D) that is an original image of a latent image (6 ″) are obtained. , Respectively.

  In the present embodiment, all the data is stored in the storage unit (U3). However, in order to explain in detail, the data is schematically shown in the drawings below.

  First, in order to obtain the image data of the print pattern (2 ″), the print pattern data (2D) that is the original image of the print pattern (2 ″) and the original image of the latent image (6 ″) are used. A certain latent image data (6D) is created by the editing unit (U2), or print pattern data (2D) created and / or acquired in advance is acquired from the input unit (U1), via the editing unit (U2). And stored in the storage unit (U3).

  As described above, the printed pattern (2 ″) is a color gradation image, and the latent image (6 ″) is a gradation image formed by being stacked on the printed pattern (2 ″).

  In the present embodiment, when the case of obtaining by the input unit (U1) and the case of producing by the editing unit (U2) are described together, the case is produced by the input unit (U1) and the editing unit (U2). It will be explained as a thing.

  If the original image acquired by the input unit (U1) is not binary image data or outline graphic data (hereinafter referred to as “digital data”) using a bitmap, it is necessary to convert it to digital data. The unit (U2) needs to further include data conversion means for converting the original image into digital data.

  Therefore, the input unit (U1) includes an input unit (U1) that acquires the print pattern data (2D) that is the original image of the print pattern (2 ″), and data conversion means that converts the acquired original image into digital data. It is preferable to be a reading device such as a scanner provided in one device or an imaging device such as a digital camera, a video camera, or a portable terminal. By using the input unit (U1) provided with data conversion means, it is possible to acquire an image and convert it into digital data at a time.

  In addition, when image data that has been created and / or acquired in advance is used as the print pattern data (2D), the input unit (U1) is a CD-ROM that has already recorded the original image that has been generated and / or acquired as digital data. Also, an input / output device such as an MO drive, a CD-ROM drive, an FD drive, or an image card reader that acquires digital data from an information recording medium such as an FD or a USB memory may be used.

  In this case, as described above, since the original image has already been converted into digital data, it is not necessary to go through the editing unit (U2). Therefore, after the original image is acquired by the input unit (U1), it is stored in the storage unit (U3) without going through the editing unit (U2).

  Pixels in image data are points that are arranged in a grid pattern to form image data, and have information about color as numerical values. The image format for forming an image with pixels is not limited as long as the image can be formed with pixels such as TIFF format and BMP format. In any production or acquisition method, the image data stored in the storage unit (U3) is composed of a plurality of pixels.

  Since the medium (S3) of the present invention needs to hide the latent image (6 ″) in the printed pattern (2 ″), the printed pattern data (2D) is converted into the latent image image data. The data has a larger image size than (6D). Therefore, the image sizes of the produced print pattern data (2D) and latent image data (6D) are appropriately set by the editing unit (U2).

Next, as a color separation step ST2, as shown in FIG. 15, the editing unit (U2) performs color separation on the print pattern data (2D) to produce a plurality of pieces of separated image data (2DC , 2DM, 2DY). The plurality of produced decomposed image data (2DC , 2DM, 2DY) are stored in the storage unit (U3).

  The color separation in the present invention is to convert the print pattern data (2D) into digital data that can be printed in multiple colors. For example, as the CMY separation, the editing unit (U2) converts the print pattern data (2D) to Conversion into cyan-separated image data (2DC), magenta-decomposed image data (2DM), and yellow-separated image data (2DY), which are three types of data of cyan, magenta, and yellow.

  In addition, black is added to cyan, magenta, and yellow, and CMYK decomposition is performed to convert into cyan decomposition image data (2DC), magenta decomposition image data (2DM), yellow decomposition image data (2DY), and black decomposition image data (not shown). May be. Further, as the special color separation, the image data may be converted into the respective separated image data of special colors other than cyan, magenta, yellow and black.

  For color separation, image processing software (for example, Photoshop manufactured by Adobe) can be used. In addition, for the special color separation, a special color separation device (for example, a special color separation device manufactured by BARCO) can be used. Hereinafter, in the present invention, it is assumed that the color separation is CMY separation and is converted into cyan separation image data (2DC), magenta separation image data (2DM), and yellow separation image data (2DY).

Next, in the concealment camouflage image data production step ST3, in the editing unit (U2), concealment decomposition image data for concealing the latent image (6 ″) among the respective decomposition image data (2DC , 2DM, 2DY) Then, the latent image data (6D) is overlapped to remove the overlapping portion with the latent image data (6D) in the concealment decomposed image data, and the concealing camouflage image data (7D) is produced.

First, in the editing unit (U2), each decomposed image data (2DC , 2DM, 2DY) and latent image data (6D) are converted into data that can be processed using a plurality of image data. Position coordinates, which are position information common to data (2DC , 2DM, 2DY), are set.

  First, at least three points are set as reference points for cyan separated image data (2DC). In FIG. 16, three points (P1, P2, P3) are set as reference points among the four corners of the cyan separation image data (2DC). Since the cyan separation image data (2DC) is composed of a plurality of pixels, a dot means one pixel.

  In the cyan-decomposed image data (2DC), first, the first reference point (P1) is set as the coordinates of the zero point (0, 0), and then X1 from the first reference point (P1) in the X direction. A point at a distance of is a second reference point (P2), and further, a point at a distance of Y1 from the first reference point (P1) in the Y direction is a third reference point (P3) did.

  In this way, P1, P2, and P3 are set as reference points in the cyan separation image data (2DC). Next, position coordinates, which are unique position information indicating the distance to the zero point (0, 0), are set for a plurality of pixels constituting the cyan separation image data (2DC).

Note that general image formats such as the TIFF format, JPEG format, and BMP format have a characteristic that pixels are always arranged in parallel along two axial directions that are perpendicular to each other in the vertical and horizontal directions. Therefore, when all the pixels constituting each decomposed image data (2DC , 2DM, 2DY) have the characteristic that they are always arranged in parallel along two axial directions perpendicular to each other, each decomposed image data ( 2DC , 2DM, 2DY) are self-explanatory and there is no need to consider rotation, so only one reference point is required. Hereinafter, in the present invention, each decomposed image data (2DC , 2DM, 2DY) will be described as a configuration having three reference points.

Next, for magenta decomposed image data (2DM), yellow decomposed image data (2DY), and latent image data (6D), a reference point at a position common to the reference point set in cyan decomposed image data (2DC) Set. The details of the reference point setting method are described in Japanese Patent Application Laid-Open No. 2011-140217, and therefore will be omitted. Each decomposed image data (2DC , 2DM, 2DY) set with a reference point is stored in the storage unit (U3).

First, after setting a reference point for the cyan separated image data (2DC), it is common to the magenta separated image data (2DM), the yellow separated image data (2DY), and the latent image data (6D). Although the reference point is set, the present invention is not limited to this, and after setting the reference point for any one of the three separated image data (2DC , 2DM, 2DY) and latent image data (6D), It is possible to set a reference point at a common position for the remaining image data.

Next, in the editing unit (U2), among the decomposed image data (2DC , 2DM, 2DY) after setting the reference point, concealed decomposed image data for concealing the latent image (6 ″), and latent image image data Overlapping (6D) is performed to remove the overlapping portion with the latent image data (6D) in the concealment decomposed image data, and concealment camouflage image data (7D) is produced. The produced concealing camouflage image data (7D) is stored in the storage unit (U3).

  FIG. 17 is a schematic diagram showing a production process of concealment camouflage image data (7D). First, concealment image data (2DC ′) for concealing the latent image (6 ″) is set. The concealed image data (2DC ′) is image data used to conceal the latent image (6 ″) under diffuse reflected light. The above-described three decomposed image data (2DC, 2DM, 2DY), which is one decomposed image data.

  In FIG. 17A, as an example, since the latent image (6 ″) is concealed in the cyan separated image data (2DC), the hidden image data (2DC ′) is the cyan separated image data (2DC). ) It should be noted that it is also possible to conceal other decomposed image data (2DM, 2DY) by a production method similar to the procedure described later. In this case, the concealed image data (2DC ′) is each decomposed image data that conceals the latent image (6 ″).

  Next, the hidden image data (2DC ′) shown in FIG. 17A and the latent image data (6D) shown in FIG. FIG. 17C shows image data in which the hidden image data (2DC ′) and the latent image data (6D) are superimposed. Hereinafter, when the image data are overlapped, the reference point data are overlapped with each other.

  Next, the overlapping portion with the latent image data (6D) in the concealed image data (2DC ') is removed, and concealment camouflage image data (7D) is produced. As described above with reference to FIG. 11, the camouflage image (3 ″) has the pattern portion (4 ″) having the same shape as that of the latent image (6 ″). When the latent image (6 ″) is stacked and arranged, it is possible to form a printed pattern (2 ″) in which the latent image (6 ″) is hidden.

  By performing processing for removing the overlapping portion with the latent image data (6D) in the hidden image data (2DC ′), the pattern portion (4 ″) having the same shape as the latent image (6 ″) is obtained. It becomes the camouflage image data (7D) for concealment which is image data. The concealing camouflage image data (7D) also has a reference point at a common position.

  Therefore, the portion (4D) corresponding to the pattern portion (4 '') in the concealing camouflage image data (7D) and the latent image (6 '') are arranged in the same shape and at the same position. When output onto the substrate (1), the latent image (6 ″) can be all laminated and arranged on the pattern portion (4 ″) having the same shape.

  Next, as the color setting step ST4, the editing unit (U2) outputs the color material when the latent image data (6D), which is image data used to form the print pattern (2 ″), is output. A color is set, and color setting latent image data is created. The produced color setting image data is stored in the storage unit (U3).

  In the color setting step ST4, the color of the color material when the latent image data (6D) is output is set to the color of the separated image data used when the concealing camouflage image data (7D) is generated in ST3. .

  For example, in the above-described ST3, as an example, since it is generated based on cyan separation image data (2DC), the color of the color material when the latent image data (6D) is output is set to cyan. The latent image data (6D) after color setting becomes color setting latent image data (6D ′).

  The concealing camouflage image data (7D), magenta decomposed image data (2DM), and yellow separated image data (2DY) already have color information, so the color of the color material at the time of output is set. do not have to.

  Next, as the camouflage image data creation step ST5, the editing unit (U2) uses the remaining two decompositions that were not used when creating the concealment camouflage image data (7D) and the concealment camouflage image data (7D). Image data is synthesized to create camouflage image data (3D). The produced camouflage image data (3D) is stored in the storage unit (U3).

  As described above with reference to FIG. 15 in ST2, when color separation is performed on the print pattern data (2D) that is the image data of the print pattern (2 ″) that is a color gradation image, as shown in FIG. There are three types of image data: decomposed image data (2DC), magenta decomposed image data (2DM), and yellow decomposed image data (2DY).

  In the present invention, as an example, it is assumed that the latent image (6 ″) is concealed in the cyan separation image data (2DC) of one color, and concealment camouflage image data (2DC) based on the cyan separation image data (2DC). 7D) and color setting latent image data (6D ′). Therefore, when the concealment camouflage image data (7D) and the color setting latent image data (6D ') are combined, the cyan separation image data (2DC) is obtained.

  The same applies to the medium (S3). When the color pattern of the printed pattern (2 ″), which is a color gradation image, is color-separated, the cyan-separated image (2C), the magenta-decomposed image (2M), and the yellow-separated image Three types of decomposed images of the image (2Y) are obtained. In the present invention, as an example, since the latent image (6 ″) is concealed in the cyan separation image (2C) of one color, the cyan separation image (2C) is converted into the latent image (6 ″). And a cyan background area (7C) which is another area. When the latent image (6 ″) and the cyan background region (7C) are combined, a cyan separated image (2C) is obtained.

  As described above, the printed pattern (2 ″) of the present invention forms only the latent image (6 ″) by printing twice, so that the printed pattern (2 ″) has diffusibility with other regions in the ink receiving region (Z). In contrast, the latent image (6 ″) becomes visible when observed under specular reflection light. Therefore, in order to form only the latent image (6 ″) shown in FIG. 18 by printing twice and to form a printed pattern (2 ″) by another one-time printing, other than the latent image (6 ″). The magenta decomposed image (2M), yellow decomposed image (2Y), and cyan background region (7C) are output as one image, and only the latent image (6 ″) is output on the upper layer or the lower layer. There is a need.

Therefore, in the camouflage image data creation step ST5, in order to output the magenta decomposed image (2M), the yellow decomposed image (2Y), and the cyan background region (7C) as one image, the base image of the magenta decomposed image (2M) is used. Certain magenta decomposed image data (2DM) , yellow decomposed image data (2DY) that is a base image of yellow (2Y) decomposed image, and concealing camouflage image data (7D) that is a base image of the cyan background region (7C). Combining and generating camouflage image data (3D) as one image data.

  FIG. 19 is a schematic diagram showing the camouflage image data creation step ST5. Since the magenta decomposed image data (2DM), the yellow decomposed image data (2DY), and the concealing camouflage image data (7D) have reference points (P1, P2, P3) at common positions, respectively. After superimposing the reference points, the images are combined in the editing unit (U2) to produce camouflage image data (3D).

  FIG. 20A is a schematic diagram showing camouflage image data (3D), and FIG. 20B is a schematic diagram showing latent image data (6D). The camouflage image data (3D) has color information of cyan, magenta, and yellow, but does not have cyan color information only in a portion corresponding to the pattern portion (4 ″).

  On the other hand, the color setting latent image data (6D ′) has only cyan color information. Therefore, the camouflage image data (3D) and the color setting latent image data (6D ′) are stacked and output, so that the color setting latent image data (6D ′) and the pattern portion (4 ″) are cyan. By canceling, the latent image (6 ″) can be concealed when the printed pattern (2 ″) is used.

  Note that, as described above, the latent image (6 ″) is not limited to cyan, but may be other colors. For example, in the case of magenta, the camouflage image data (3D) has color information of cyan, magenta, and yellow, but only the portion corresponding to the pattern portion (4 ″) has magenta color information. Not.

  On the other hand, the color setting latent image data (6D ′) has only magenta color information. Therefore, the camouflage image data (3D) and the color setting latent image data (6D ′) are stacked and output, so that the color setting latent image data (6D ′) and the pattern portion (4 ″) are magenta. By canceling, the latent image (6 ″) can be concealed when the printed pattern (2 ″) is used.

  Next, as an output step ST6, in the printing unit (U4), based on the color setting latent image data (6D ′) created in ST4 and the camouflage image data (3D) created in ST5, the base material (1) Form an image on top.

As the substrate (1), a substrate having at least an ink receiving area (Z) formed by applying a coating liquid mainly composed of a porous extender pigment is used. In the present invention, the ink receiving area (Z)
The image is changed under diffuse reflection light and regular reflection light by utilizing the difference in the permeability of the ink that is generated by printing on the sheet. Therefore, the base material (1) needs to have an ink receiving area (Z).

  In addition, when the base material (1) does not have the ink receiving area (Z), the printing section (U4) performs the receiving area forming step ST7 on the base material (1) before the output step ST6. An ink receiving area (Z) is formed by applying a coating liquid mainly composed of a porous extender pigment to at least a part of the area, and then drying the coating liquid.

  By providing the receiving region forming step ST7, it is possible to form the printed pattern (2 ″) without limiting the base material (1).

  In the output step ST6, first, the color setting latent image data (6D ') is printed on the substrate (1) by a digital printing method to form a latent image (6 "). The printing method is not particularly limited as long as it is a printing method capable of outputting on the ink receiving area (Z).

  Next, the camouflage image data (3D) is a latent image (6 ″) printed on the substrate (1) so that the latent image (6 ″) and the pattern portion (4 ″) are in the same position. ) To form a medium (S3) on which a printed pattern (2 ″) is formed.

  The order of printing is not limited, and the camouflage image (3 ″) may be formed first, and then the latent image (6 ″) may be formed thereon.

  The number of output times of the color setting image data (6D ′) and the camouflage image data (3D) is the number of times that the latent image (6 ″) and the camouflage image (3 ″) printed on the substrate (1) are printed. If there is a difference in the number of times, the number of times of printing is not particularly limited.

  The printing method for the medium (S3) of the present invention is preferably on-demand printing. By producing by on-demand printing, the printed pattern (2 ″) that is a visible image and the latent image (6 ″) that can be visually recognized by changing the observation angle are different for each medium (S3). It becomes possible to print. In other words, the print pattern (2 ″) and the latent image (6 ″) can be handled as variable images.

  When the medium (S3) is produced using the print pattern (2 ″) and the latent image (6 ″) as variable images, the image data acquisition step ST1 includes a plurality of print pattern data (2D) to be produced, And after producing at least two different image data in at least one kind of image data among a plurality of latent image data (6D) by the input unit (U1) or the editing unit (U2), the storage unit (U3) To store.

  When the medium (S3) is produced using each image as a variable image, the user can change the variable image from the plurality of image data stored in the storage unit (U3) in the image data acquisition step ST1 before the output step ST6. The data selection step ST5.5 is further selected for selecting desired image data.

  In the output step ST6, the camouflage image data (3D) and the color setting latent image data (6D ′) produced in each step based on the desired image data selected in the data selection step ST5.5 are printed in the printing unit ( From U4), it outputs as different image data. The plurality of produced media (S3) are media (S3) to which a desired image is given as variable information.

  For example, when three media (S3) are produced and the color setting latent image data (6D ′) is a variable image among the camouflage image data (3D) and the color setting latent image data (6D ′), In the data acquisition step ST1, five different image data are produced as latent image data (6D) by the input unit (U1) or the editing unit (U2), and then stored in the storage unit (U3).

  Next, the camouflage image data (3D) corresponding to each of the five different latent image data (6D) in the camouflage image data creation step ST3, the color setting step ST4, and the camouflage image data creation step ST5. Three different camouflage image data are created by the editing unit (U2) and then stored in the storage unit (U3).

  Also, in the five latent image data (6D), in the color setting step ST4, colors are set and the color setting latent image data (6D ′) is created in the same manner as described above, and then the storage unit ( U3).

  Next, in the data selection step ST5.5, a desired latent image to be changed by the user from the five latent image data (6D) stored in the storage unit (U3) in the image data acquisition step ST1. Three pieces of data (6D) and three pieces of color setting latent image data (6D ′) and camouflage image data (3D) created based on the selected latent image data (6D) are selected.

  Finally, in the output step ST6, the three color setting latent image data (6D ′) and the camouflage image data (3D) selected in the data selection step ST5.5 are output as different image data from the printing unit (U4). To do. The produced three media (S3) are media (S3) to which a printed pattern (2 ″) and a latent image (6 ″), which are visible images, are all applied as different images (variable images). .

  As described above, in the method for producing the medium (S3) of the present invention, when producing a plurality of media (S3), a plurality of image data is produced in the image data acquisition step ST1, and the concealing camouflage image data producing step ST3, color After creating different image data by the setting step ST4 and the camouflage image data creation step, the desired image data is selected and printed in the data selection step ST5.5 and the output step ST6, so that the image can be easily used as a variable element. It becomes possible to grant.

DESCRIPTION OF SYMBOLS 1 Base material 2, 2 ', 2''Print pattern 3 Camouflage image 3a Camouflage element 4, 4', 4 "Pattern part 5, 5 ', 5" Background part 6, 6', 6 "Latent image image 6a Latent image element 7 Gradation camouflage part S1, S2, S3 Anti-counterfeiting medium Z Ink receiving area M Production device U1 Input part U2 Editing part U3 Storage part U4 Printing part U5 Communication interface U6 Display part 2D Print pattern data 2DC Cyan separation image Data 2DM Magenta decomposition image data 2DY Yellow separation image data 2DC 'Hidden image data 3D Camouflage image data 6D Latent image image data 6D' Color setting latent image data 7D Hiding camouflage image data

Claims (6)

An ink receiving area having a printed pattern of a color different from that of a base material formed by laminating a camouflage image and a latent image on at least a part of the base material;
In the camouflage image, a pattern portion having a color different from that of the substrate is formed with at least a first ink, and a background portion formed around the pattern portion is formed with at least a second ink having a color different from that of the substrate. Formed,
The latent image is formed with a third ink having the same shape and the same size as the pattern portion and a color different from that of the base material by tweezing with the background portion,
Under diffuse reflected light, the background portion is the same color as the patterned portion and the latent image formed by stacking,
Anti-counterfeiting characterized in that the latent image is visually recognized by the difference in reflected light with respect to the same incident light in the latent image and the pattern portion, which are laminated, and the background portion under regular reflection light. Medium.   The forgery prevention medium according to claim 1, wherein the first ink, the second ink, and the third ink have the same color.   The forgery prevention medium according to claim 1, wherein the pattern portion and the background portion are formed of at least two colors of ink. The printed pattern is a color gradation image, and the latent image is a gradation image;
Between the pattern portion and the background portion, a gradation camouflage portion formed of at least a fourth ink of a color different from the base material and the background portion is disposed,
4. The medium for preventing forgery according to claim 3, wherein the pattern portion and the latent image are formed of different color inks. A method for producing an anti-counterfeit medium according to claim 4,
Print pattern data that is an original image of the print pattern, and image data acquisition step of creating latent image data that is an original image of the latent image,
A color separation step for color-separating the print pattern data to create a plurality of pieces of separated image data;
After setting the position coordinates that are common position information for the plurality of decomposed image data and the latent image data, concealed decomposed image data for concealing the latent image image data among the plurality of decomposed image data and Superimposing the latent image data to remove the overlapping portion, creating concealing camouflage image data;
Setting the color of the latent image data to the same color as the concealment decomposed image data, and creating color setting latent image data;
Wherein a hiding for camouflage image data, was not used in making the hiding for camouflage image data, it synthesizes the each remaining separation image data, comprising the steps of producing a camouflage image data,
An anti-counterfeit medium manufacturing method comprising an output step of laminating and outputting the camouflage image data and the color setting latent image data.
  6. The method for producing an anti-counterfeit medium according to claim 5, further comprising a step of forming an ink receiving area on the substrate before the output step.

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