JP2007245586A - Forgery-proof printed matter and its genuineness discrimination method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forgery-preventing technique combining a technique on paper as a substrate and a printing technique for printing a pattern on the substrate, for the purposes of imparting preventive performance against forgery, alteration or falsification of a printed matter with an asset value and easily discovering a doubtful forged article even if a forgery is made. <P>SOLUTION: This forgery-proof printed matter is constituted of the substrate, a pattern drawn in a colorless or colored permeable ink on the surface of the substrate and a region, formed of a specified material containing a pigment of a different color from the permeable ink, on part or the entirety of the interior of the substrate. A solvent of the permeable ink permeates the interior of the substrate and a pigment of a different color from the permeable ink is discharged through a chemical reaction with the specified material inside the substrate. Consequently, the color of the pattern composed of the permeable ink when viewed from the face of the printed matter and the color of the pattern when viewed from the back, appear differently from each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to printed matter in which a pattern is formed using penetrable ink on securities having assets such as securities, checks, lotteries, etc. and passports, visas, etc., and forgery, alteration, alteration This is intended to prevent the above.

  Conventionally, various security technologies have been used for securities having asset value and booklets such as passports and visas in order to keep the value of the medium usefully. Commonly used as security technology are thread safety lines printed with holograms and micro characters, paper with watermarks, functional inks such as optically changing ink (OVI), offset printing, By effectively combining printing technologies such as screen printing and intaglio printing, and image line layout, the effect of inhibiting counterfeiting and the like is achieved.

  Here, functional ink, which is one of security technologies, is a combination of infrared reflection / absorption and magnetic properties, or optical change ink utilizing light reflection, as well as paper and other basic materials. There is known a penetrating ink that penetrates into a material and prevents alteration of the pattern.

  As a general penetrating ink, coloring that does not diffuse to the writing surface by utilizing the relationship between the penetrating strength of the two colorants and the writing surface with solvent permeability such as paper and cloth. Metal powder pigment is used for the material, and dye is used for the colorant that penetrates and diffuses on the writing surface, creating a contour line around the handwriting by the colorant to enhance the handwriting and providing a beautiful double color. Have been disclosed (for example, Patent Document 1).

  Further, there is disclosed a printed matter in which a penetrating ink is provided with a fluorescent function, and characters and numerical information, etc. that are desired to prevent tampering and the like formed on paper are dispersed in a vehicle with a colorant and a fluorescent pigment or dye. (For example, patent document 2).

  Furthermore, as another technique, a pigment is used as a coloring material for forming a facial photographic image or the like, and in addition to that, a fluorescent dye is mixed in the ink, thereby stripping off the pigment portion as a counterfeit and creating a new image. It is difficult to remove the fluorescent dye soaked in the deep part of the base material, and a method for easily determining whether the original image has been tampered with by irradiating the image forming part with ultraviolet rays is known. (For example, Patent Document 3).

Japanese Patent Application No. 55-189315 Japanese Patent No. 3263315 JP 2002-226740 A

  The technique of Patent Document 1 uses the strength of permeability of two kinds of colorants, uses a pigment that does not easily penetrate in the character part, and a dye that easily penetrates and diffuses in the character outline part. It is said that multiple colors can be obtained, but it is possible to easily obtain the same effect by printing with a material that has different light emitters, printing with a material that easily penetrates, and overprinting with a material that is difficult to penetrate. Since it becomes possible, deterring effects such as forgery and alteration cannot be expected.

  Moreover, about the technique of patent document 2, by printing using the permeable fluorescent ink which disperse | distributed the coloring agent and fluorescent dye to the vehicle containing the resin component which hardens | cures by irradiation of an ultraviolet ray, and a bleeding acceleration | stimulation liquid, after printing, The fluorescent dye penetrates around the printed pattern (pattern, etc.) by the bleed accelerating liquid. When the printed matter is irradiated with ultraviolet rays, the printed pattern (pattern, etc.) emits light. It is necessary to irradiate ultraviolet rays, and an instrument or device for that purpose must be used.

  In addition, if it becomes clear that a fluorescent dye is contained, the same ink is produced, or after printing a printed pattern (pattern, etc.), the surroundings are printed with colorless or invisible fluorescent ink. There was a problem that the same printed matter could be obtained by applying.

  Moreover, about the technique of patent document 3, the applicant in patent document 2 uses the permeable ink containing the fluorescent dye further described in patent document 2, and by printing on the base material comprised in multilayer, Even if the image forming body on the substrate surface is peeled off, the fluorescence functionality penetrates into the paper layer. It is disclosed as an effective technique for confirmation.

However, for general users, when the medium is imitated closely, it does not hold an ultraviolet irradiation device or the like, so it is impossible to determine whether it is genuine or illegal at first glance. In addition, if the functionality of the ink is further clarified, there is still room for improvement, for example, by using the same ink, the ink can be easily forged.
In addition, since the base material itself requires a multilayer structure (including OVD), manufacturing is more complicated than a base material having a simple single layer structure.

  The present invention is an invention made in view of the above-mentioned problems of the prior art, and is a booklet such as securities, passports, visas, etc. having asset values that require high security (not necessarily limited to these). ), Anti-counterfeiting, alteration, and tampering prevention, and even if they are fraudulent, printed materials with easy-to-find performance that can be easily discovered by observing suspected fraudulent products and their authenticity It aims to provide a method.

  The anti-counterfeit printed matter of the present invention has a base material, a pattern made of a colorless or colored penetrating ink on the surface of the base material, and a color different from the penetrating ink in part or all of the inside of the base material. A printed matter comprising a region composed of a predetermined material containing a pigment, and penetrating ink (solvent thereof) penetrates into the base material and reacts with the predetermined material inside the base material. The different color pigments are released, so that the color of the pattern composed of penetrating ink when the printed material is observed from the front surface and the color of the pattern when the printed material is observed from the front surface when viewed from the back surface. Is characterized by the appearance of different colors.

  Further, the base material in the forgery-preventing printed matter of the present invention is formed of at least one or more paper layers, and a predetermined material containing a pigment having a color different from the penetrating ink in at least a part or all of the paper layers. A region having s is formed.

  Further, the anti-counterfeit printed matter of the present invention is a position where a region having a predetermined material containing a pigment having a color different from that of the permeable ink formed on at least one paper layer overlaps a pattern formed by the permeable ink. And are different in shape.

The anti-counterfeit printed matter of the present invention is a predetermined material in which the paper layer forming the base material is a multilayer having two or more layers, and at least two of the multilayers contain pigments of different colors from the permeable ink. A region having s is formed.

  In addition, the anti-counterfeit printed matter of the present invention is characterized in that the predetermined material containing a pigment of a color different from the penetrating ink is a soluble ink having a resin containing the pigment.

  The penetrating ink in the forgery-preventing printed matter of the present invention is characterized by having at least one functional material of fluorescence, infrared rays, ultraviolet rays, and magnetism.

  The present invention also includes a substrate, a pattern formed of colorless or colored penetrating ink on the surface of the substrate, and a pigment having a color different from that of the penetrating ink in part or all of the inside of the substrate. A method for discriminating a printed matter comprising regions composed of a predetermined material that includes a measured value obtained by irradiating the front and back of the printed matter with light, capturing the optical information obtained there, and analyzing the optical information as an image This is a forgery-preventing printed matter discriminating method in which pass / fail is discriminated by comparing with normal measurement values stored in advance.

  Furthermore, in the method for discriminating forgery-preventing printed matter of the present invention, the measured values obtained by analyzing optical information obtained by irradiating light on the front and back of the printed matter as images are the patterns and penetrating inks by penetrating ink. The shape, density and / or functionality of a pattern composed of a given material containing pigments of different colors, and the normal measurement value stored in advance has a color different from that of penetrating ink and penetrating ink. The reference value includes at least one of the shape, concentration, and / or functionality of a region composed of a predetermined material containing a pigment.

  The anti-counterfeit printed matter of the present invention is easy to visually check without using a special discriminating device because the pattern or color formed on the substrate surface is different from the pattern or color visible when observed from the back side of the substrate. Can be determined. In addition, as in the present invention, forming with different patterns or colors on the front and back sides when observed is an event achieved by the fusion of technology between paper and printing, so it is difficult to tamper with easily. Thus, it is possible to exert a deterrent effect such as counterfeiting.

  In addition, as a penetrating ink, a pigment is used as a coloring material for forming a pattern, and in addition, at least one or more dyes or magnetic components such as fluorescent, infrared, and ultraviolet are mixed in the ink. , Functional components that have penetrated into the inside of the substrate or the back of the substrate even when a new pattern is formed using another ink by peeling off the pigment part of the substrate surface by forgery, alteration, alteration, etc. It will be difficult to remove.

  Furthermore, it is possible to easily determine whether or not the original pattern has been tampered with by irradiating the pattern with fluorescence, infrared or ultraviolet light, or reading the magnetic pattern with a magnetic sensor.

Next, an embodiment of the anti-counterfeit printed matter ( X ) according to the present invention will be described with reference to the drawings. In addition, about this embodiment, although the case where the paper which thinks that the effect of this invention is most demonstrated is used as a base material is demonstrated, a base material can contain the material which permeate | transmits a permeable ink, and a soluble ink. The material is not limited to this as long as it is a suitable material.

  FIG. 1 (a) is a view of the surface of an anti-counterfeit printed matter of the present invention in which a pattern (1 ′) is printed using a permeable ink (1) on a substrate, as seen from above. It can be confirmed that the pattern (1 ′) used and the pattern (3) using ordinary offset ink are printed. FIG.1 (b) is a figure which shows the A-A 'sectional drawing in (a). Moreover, FIG. 2 is the figure which looked at the printed matter of FIG. 1 from the back surface, and the permeable ink which printed the pattern (6) and the surface (1 ') on the surface by the normal offset ink on the back surface side, It reacts with the dissolvable ink applied during the paper manufacturing process and becomes a color different from the penetrating ink, and the pattern (5) is thinly expressed, and the surface printed with the normal offset ink (3 ) Cannot be confirmed.

  Since the present invention is a printed matter composed of a fusion of the technology of paper (a substrate of a material having a high absorbability that allows the solvent contained in the permeable ink to permeate) and the printing technology, first the paper (2) In the production process, the soluble ink (4) is applied to the paper. As the soluble ink (4), one prepared so as not to affect the paper color is used.

  Giving soluble ink that does not affect the paper color at first glance has the effect of not realizing that the base material itself is protected against counterfeiting, and changes the paper color. As a result, by mixing the pigment and the resin, the resin covers the pigment, and the color of the pigment does not substantially affect the paper.

  As a method of applying soluble ink to paper, a method of blending soluble ink in the stock in the paper manufacturing process, a process called a wire part that is still containing a large amount of water, and uniformly spraying the entire surface of the paper There is a method to give to. However, in the method of applying soluble ink in the stock by a spraying method, it is difficult to uniformly mix the soluble ink up to the inside of the paper, resulting in mixing from the surface to the intermediate position. Therefore, it is preferable to add a soluble ink to the paper stock in advance.

  In addition, in order to make the shape different from the pattern applied with the penetrating ink appear, the shape of the spray port is made so as to partially obtain the desired pattern, instead of applying the soluble ink to the entire paper. There are a spraying device (not shown, for example, a known ink jet method) and a transfer method using a sheet provided with a desired shape in advance. However, since any method will be printed later on the same pattern as that applied to a part of the paper, so that the position of the soluble ink to be applied to the paper, so as to print to the same location, It is important to design so that the position of the pattern applied with the penetrating ink is the same.

  When the paper as the base material is composed of two or more paper layers, multilayer paper can be manufactured by using the technique disclosed in Japanese Patent Application Laid-Open No. 2003-13395 disclosed by the same applicant.

In this way, the pigment of the desired color is divided into about 1/2 of the petroleum solvent and the resin for the base material (2) containing the soluble ink applied so as not to affect the color of the base material. When pattern (1 ') is printed with penetrating ink (1) mixed with blended varnish, the petroleum solvent in the ink penetrates into the substrate and reacts with the resin of soluble ink in the substrate. Thus, the resin component containing the pigment starts to melt, and the internal pigment is released. Therefore, as shown in FIG. 2, when observing from the back surface of the printed matter, the color changes only when the soluble solvent (4) inside the substrate reacts with the petroleum solvent of the permeable ink (1), and the surface changes. Patterns with similar colors and different colors will appear thin.
The pattern (3) on the front surface and the pattern (6) on the back surface printed with ordinary offset ink cannot be confirmed even when observed from the opposite side because the petroleum solvent does not penetrate.

Next, the authenticity determination method of the present invention will be described with reference to FIGS. 7, 8, and 9 (flow charts).
First, specific light (10) is irradiated to the front and back surfaces of the anti-counterfeit printed matter (X) of the present invention, and the optical information is acquired by the light receiving device (11). The light receiving device is not particularly limited, but a device capable of acquiring an image such as a color CCD camera is preferable. The obtained light information is analyzed by measuring at least one of the shape by image, the density by color, and the functionality contained in the ink. The analyzed value is compared with a value measured for a regular printed matter stored in advance, and pass / fail is determined.

  The determination of pass / fail will be described with reference to FIG. The pass / fail judgment is made by two kinds of comparisons. (A) of FIG. 8 is the optical information (B) acquired from the measurement object, and is the optical information of the regular printed matter stored in advance as a comparison object, and (a) and (b) are based on the permeable ink that can be confirmed from the surface. In the printed pattern information, (a ′) and (b ′) are information on the pattern that appears due to the soluble ink that can be confirmed from the back side.

  The optical information to be compared is the shape of the printed pattern, the color density, and the ink functionality, all of which are comparisons (a) between the actual printed surface and the back surface, and the regular printed surface and the back surface stored in advance. (B) comparing the actual print surface with the pre-stored regular print surface (b), the actual print back surface and the pre-stored regular print back surface There is a comparison (b '). However, as described in Example 4, when the dissolvable ink is partially applied as a desired shape, it can be confirmed as separate shapes on the front and back sides. In the comparison (b ') of the front and back, only the shape may be excluded from the items to be compared.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, the form of this invention is not limited to the range of these Examples.

(Example 1)
In this example, paper is used as the base material, and the soluble ink 4 containing the blue pigment is mixed in the entire paper layer. On the surface of the paper, red penetrating ink having the following blending ratio is applied. Printing.
Red pigment ... 30%
Varnish ... 70%
(Varnish: Petroleum solvent 50-60%, resin 40-50%)

  As shown in FIG. 1 and FIG. 2, the printed penetrating ink (1) is composed of a resin of the soluble ink (4) in which the petroleum solvent penetrates into the paper layer and is mixed in the paper layer. As a result of the reaction, the resin component enclosing the pigment was dissolved, and the blue pigment was released.

  Since the red pigment of the penetrating ink remains on the paper surface, a pattern (1 ′) is formed in red color. On the other hand, when observed from the back side of the paper, due to the color of the blue pigment, A pattern (5) having the same formation as the pattern (1 ′) printed with the thin permeable ink was confirmed.

(Example 2)
FIG. 3 also shows that the soluble ink (4) containing a yellow pigment is applied only in the second paper layer (8) of the base material (2) composed of two paper layers. On the surface of the first paper layer that does not contain, the pattern (1 ′) is printed with red penetrable ink as in Example 1.

  In the printed penetrating ink (1), the petroleum solvent penetrates into the paper layer and reaches the second paper layer (8) from the first paper layer (7). The petroleum solvent reacts with the resin of the soluble ink mixed in the second paper layer (8), so that the resin component surrounding the pigment is dissolved and the yellow pigment is released.

Since the red pigment of penetrating ink remains on the surface of the first paper layer, a pattern is formed in red color, while the color of the yellow paper pigment is formed on the second paper layer. A pattern can be confirmed by this yellow pigment when observed from the back surface of the substrate.
As shown in FIG. 4, the second paper layer (8) containing the soluble ink (4) in FIG. 3 is replaced with a third paper layer (7) similar to the first paper layer (7) not containing the soluble ink. It can also be formed so as to be sandwiched between paper layers (9).

Example 3
Another embodiment will be described with reference to FIG. For the substrate according to this example, the first paper layer (7) (the layer on the side on which the pattern is printed with the penetrating ink), the second paper layer (8) (intermediate layer) and the third paper layer ( 9) A soluble ink (4) composed of three paper layers composed of (a layer on the side opposite to the paper layer on which a pattern is printed with penetrating ink) and containing a yellow pigment in the second paper layer (8). The third paper layer (9) is mixed with a soluble ink (4 ′) containing a blue pigment, and the first paper layer (7) has the same surface as in Example 1. A pattern (1 ′) is printed using a red penetrating ink (1).

  The second paper layer (8) has a soluble ink (petroleum-based solvent of penetrable ink printed on the first paper layer (7) infiltrated into the second paper layer (8). By reacting with the resin of 4), the resin component enclosing the pigment is melted and the yellow pigment is released.

  Further, after the third paper layer (9) has reacted with the resin through the penetration of the petroleum solvent of the permeable ink printed on the first paper layer (7) into the second paper layer (8), The petroleum solvent reacts with the resin of the soluble ink (4 ′) mixed in the third paper layer (9). At this time, the resin component enclosing the blue pigment is dissolved, and the blue pigment is released.

  Since the red pigment of the penetrating ink remains on the first paper layer (7) of the substrate, the pattern (1 ') is formed in red color, while the second paper layer In (8), a color and pattern (5) are formed with a yellow pigment. Further, the third paper layer (9) is formed with a color and pattern (5 ') by a blue pigment. When this base material is viewed from the third paper layer on the back side, a color in which yellow of the second paper layer (8) and blue of the third paper layer (9) are mixed is emitted.

Example 4
Still another embodiment will be described with reference to FIG. On the first paper layer (7) of the base material composed of two paper layers, a star pattern (1 ') is formed with black penetrable ink including an infrared function. Also, the second paper layer (8) has a yellow color in the paper manufacturing process in advance in an area that overlaps the area of the pattern (1 ′) printed on the surface of the first paper layer (7). A soluble ink (4) containing a pigment is mixed by an ink jet method so as to have a pattern (5) different from the star-shaped pattern (1 ′) applied to the surface of the first paper layer.

  In the printed penetrating ink, the petroleum solvent penetrates into the paper layer and reaches the second paper layer (8). The petroleum solvent reacts with the resin of the soluble ink mixed in the second paper layer (8), so that the resin component surrounding the pigment is dissolved and the yellow pigment is released.

  On the surface of the first paper layer (7), a red pigment of penetrable ink remains, thereby forming a star-shaped pattern (1 ') in red color, while the second paper layer ( In 8), it can be confirmed by observing the surface opposite to the pattern (1 ′) applied with the penetrating ink that a pattern (5) different from the star shape is formed in yellow color. It was.

  Another form in which a base material composed of two or more paper layers and a pattern different from the penetrable ink pattern is applied to the inside of the base material by the soluble ink is the feature previously disclosed by the same applicant. It is also possible to print a desired pattern on a non-woven fabric with a soluble ink in a multi-layer paper making method based on Kokai 2003-13395, and paper it into a paper layer.

  As a printing method, good results can be obtained by adopting any of offset printing, letterpress printing, intaglio printing, screen printing, and ink jet printing, but the petroleum solvent component of penetrating ink is used inside the paper layer. The relief printing method is the best as a method that penetrates easily. Note that the printing method is not limited to these, and in particular, a good result can be obtained even in the impact printing method as a method similar to the relief printing method.

(Example 5)
Next, an anti-counterfeit printed material in which a star-shaped pattern is printed with a red penetrating ink containing a dye of an infrared absorbing material on the surface using a paper base to which soluble ink is applied throughout the manufacturing process. Authenticity was determined. No pattern is printed on the back side, but the soluble ink containing the blue pigment is applied to the entire surface of the paper layer. When observed from the back, a blue star-shaped pattern was confirmed.

  This anti-counterfeit printed matter is transported by a transport device (not shown), the front and back surfaces are each irradiated with specific light, and the optical information is acquired by the light receiving device and then compared with the information of the regular printed matter stored in advance. did. The result of the comparison is as follows.

  As shown in the table above, the shape of the pattern is the same as the regular printed matter stored in advance, because the printed material itself has the same shape as the front and back because it uses a base material with soluble ink applied to the entire surface of the paper layer. There is a perfect match.

  As for the color density, as a result of measuring the pattern on the front and back from the spectral reflectance, the color density measured on the front surface and the color density measured on the back surface are in agreement with the color densities on the front and back of the regular printed matter stored in advance. In addition, since the pattern that can be observed from the back side can be confirmed from the penetration of the ink in the surface printing, the feature that the color density is lighter than the surface is accurately expressed, and the difference in density is 50%. The 50% density difference between the front and back of the regular printed product stored in advance was completely consistent.

  Furthermore, in the comparison of functionality, when the infrared reflectance was measured, the infrared reflectance 30% of the actual printed matter and the infrared reflectance 30% of the regular printed matter stored in advance were completely matched.

  By comparing these optical information, if the shape, color density, density difference, and ink functionality match completely, it is determined that the product is not genuinely counterfeited or altered. If there is any discrepancy, it can be determined that the product is a fraudulent product that is suspected of forgery or alteration.

The typical sectional view of the forgery prevention printed matter of the present invention. Sectional drawing which shows the Example which concerns on the forgery prevention printed matter of this invention. Sectional drawing which shows another Example which concerns on the forgery prevention printed matter of this invention. Sectional drawing which shows another Example which concerns on the forgery prevention printed matter of this invention. Sectional drawing which shows another Example which concerns on the forgery prevention printed matter of this invention. Sectional drawing which shows another Example which concerns on the forgery prevention printed matter of this invention. The figure explaining the authenticity determination method which concerns on the forgery prevention printed matter of this invention. Diagram explaining the comparison target in authenticity determination The flowchart figure of the authenticity determination method which concerns on the forgery prevention printed matter of this invention.

Explanation of symbols

1 Penetration ink 1 'Pattern printed with penetrating ink 2 Base material 3 Pattern printed with normal ink (surface)
4, 4 'soluble ink 5, 5' pattern with soluble ink (reaction site)
6 Pattern printed with normal ink (back side)
7 First paper layer 8 Second paper layer 9 Third paper layer 10 Light source 11 Light receiving device 12 Discrimination device (front and back)
X Anti-counterfeit printed matter

Claims (8)

A substrate, a pattern made of colorless or colored penetrable ink on the surface of the substrate, and a part or all of the interior of the substrate containing a pigment of a color different from the penetrable ink A printed matter comprising an area composed of the material of
The solvent of the permeable ink penetrates into the substrate, reacts with a predetermined material inside the substrate, and a pigment having a color different from that of the permeable ink is released, so that the printed matter is observed from the surface. The anti-counterfeit printed matter is characterized in that the color of the pattern constituted by the penetrating ink when viewed from the back and the color of the pattern observed from the front surface when the printed matter is observed from the back surface are different. . The substrate is formed of at least one paper layer, and a region having a predetermined material containing a pigment having a color different from that of the permeable ink is formed on a part or all of the paper layer. The anti-counterfeit printed matter according to claim 1, wherein The region having a predetermined material containing a pigment of a color different from that of the permeable ink formed on the at least one paper layer is disposed at a position overlapping the pattern formed by the permeable ink, and The forgery-preventing printed matter according to claim 1 or 2, wherein the shape is different. The paper layer forming the substrate is a multilayer of two or more layers, and at least two layers of the multilayer are formed with regions having predetermined materials each containing a pigment of a color different from the permeable ink. The forgery-preventing printed matter according to claim 1, 2, or 3. The forgery-preventing printed matter according to claim 1, 2, 3, or 4, wherein the predetermined material containing a pigment having a color different from that of the permeable ink is a soluble ink having a resin containing the pigment. . The anti-counterfeit printed matter according to claim 1, 2, 3, 4, or 5, wherein the permeable ink has at least one functional material of fluorescence, infrared, ultraviolet, and magnetism. A substrate, a pattern made of colorless or colored penetrable ink on the surface of the substrate, and a part or all of the interior of the substrate containing a pigment of a color different from the penetrable ink A method for discriminating a printed matter comprising an area composed of a material of
The front and back of the printed matter are respectively irradiated with light, the light information obtained there is taken in, and the measurement value obtained by analyzing the light information as an image is compared with a normal measurement value stored in advance to determine whether it is acceptable or not. A method for identifying forgery-preventing printed matter The measured value obtained by analyzing the light information obtained by irradiating light on the front and back of the printed matter as an image is a predetermined material containing a pattern of the penetrating ink and a pigment having a color different from the penetrating ink. The shape, density and / or functionality of the pattern composed of the above-mentioned regular measurement values stored in advance are determined from a predetermined material containing the permeable ink and a pigment having a color different from that of the permeable ink. 8. The method for discriminating forgery-preventing printed matter according to claim 7, wherein the reference value includes at least one of the shape, density and / or functionality of the configured area.

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