JP2005043737A - Anticounterfeit medium and anticounterfeit sticker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anticounterfeit medium and an anticounterfeit sticker whose authenticity is easily discriminated even without using a special verification device, and which are hardly counterfeited, altered, or falsified with a color digital copying machine, a color scanner or the like. <P>SOLUTION: At least a printed layer and a transparent layer are laminated in this order on a base material such as a plastic sheet. A part or whole of the surface of the transparent layer is mat finished, and a transparent coating layer is provided on top of it. The combination of these layers constitutes a pattern such as a character, a symbol, and a mark. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an anti-counterfeit medium and an anti-counterfeit seal characterized in that the authenticity can be easily judged visually without using a verifier, and forgery, alteration, and alteration are difficult. It is.

JP 2002-098829 A In recent years, copying machines using electrophotographic technology have become widespread, and anyone can easily copy characters or images printed on paper or the like. In particular, according to recent color digital copying machines, it has become possible to easily create even a copy that is extremely difficult to distinguish between a real copy and a copy copy.

  While color copying is convenient, it can be used to misuse securities such as stock certificates, bonds, promissory notes, checks, admission tickets, boarding passes, certificates, guarantees, stickers used for sweepstakes, etc. The problem of being counterfeited and used illegally is increasing. For this reason, various proposals have been made to take measures against counterfeiting such securities and certificates so that they cannot be easily copied.

  For example, a technique has been proposed in which the color of a copy obtained by color copying is different from the color of an original. In other words, this is a technique that utilizes the fact that if a part of a securities that can be used as a manuscript is colored in a very light color, the light color part cannot be accurately reproduced in a copy. In addition, there is a technique in which a halftone dot having a different size is formed on a manuscript so that the reproducibility of a small halftone dot is deteriorated even if the copy is made, and the precise copy cannot be performed. In addition, the color reproducibility of copies can be improved by printing a part of securities such as green, purple, orange, gold, silver, etc., which is a color not found in color copier developers (toners). There is also technology that makes it worse. In addition, by using two types of inks that have unique reflection characteristics in the wavelength region of human electromagnetic waves with low visibility such as 380 nm to 450 nm and 650 nm to 780 nm, the same color is recognized by visual observation. However, there is a technology that reproduces different colors on a copy by a color copying machine.

  However, in a color copying machine, it is possible to correct the color to be output by changing the digital data separated into three colors and stored in the memory. Digital presses that use digital data read by a color scanner using a principle similar to that of a color copying machine and that can be output by a color printer or color copying machine are also becoming popular. Therefore, it is now possible to precisely reproduce the color of an original document with some effort, and it is very difficult to completely prevent forgery with the above-described techniques. .

In addition, a technique has been proposed in which a special part that cannot be reproduced by a color copying machine is provided in a part of securities. Among these, a technique of providing an OVD (Optical (ly) Variable Device) foil such as a hologram foil on the surface of securities or the like has already been put into practical use. According to this, since the silver surface of the hologram specularly reflects the light, the reflected light does not enter the CCD line sensor of the color copying machine, and the silver surface portion of the original is reproduced in black on the copy. In addition, when a plurality of ceramic thin films with different refractive indexes and a predetermined thickness are laminated, a special optical thin film whose color changes depending on the viewing angle is formed, but such characteristics and configuration cannot be reproduced on a copy, If such a phenomenon occurs in a part of securities, the authenticity can be easily determined. Furthermore, a technique has also been proposed in which the optical thin film formed by this method is finely crushed, the crushed pieces are mixed into the ink, printing is performed, and the presence or absence of color change in the printed portion is used for authenticity determination. ing.

  Further, there has been proposed a medium that cannot be reproduced by a color copying machine and in which the authenticity determination is performed using a simple verifier. For example, a printed matter printed with a fluorescent ink in which a fluorescent substance is mixed in colorless or colored ink cannot reproduce even the fluorescence emission phenomenon in a color copying machine, and has a black light (ultraviolet irradiation device) or the like. The authenticity is determined by emitting fluorescence in the visible light range using a verifier.

  In addition, a latent image is formed on a part of the medium using the difference between the orientation and non-orientation of polymer liquid crystal, and is observed through a special filter, or the latent image is visualized while irradiating light through a special filter. Thus, a technique for determining authenticity by observing is also proposed (see, for example, Patent Document 1).

  In addition, a pattern is formed on a part of the medium with different light sources utilizing the characteristics of the lanthanoid compound, for example, different colors under sunlight and fluorescent lamps, and the presence or absence of this pattern is confirmed. Thus, a method of determining authenticity has also been proposed (see, for example, Patent Document 2).

  However, these techniques require a special verifier for true / false judgment, and there is a problem that true / false judgment cannot be performed without a verifier.

  The present invention has been made in view of the above-described problems. The present invention provides an anti-counterfeit medium and a forgery that can easily determine authenticity without using a special verifier and are difficult to forge or tamper with a color copying machine. It is an object to provide a prevention seal.

  In order to achieve the above object, in the invention according to claim 1, at least a printing layer and a transparent layer are sequentially provided on a substrate, and at least a part of the surface of the transparent layer is formed. An anti-counterfeit medium characterized in that it has a mat shape and is partially provided with a transparent coating layer, and a combination of these forms a pattern of characters, symbols, figures, patterns or marks. is there.

  The invention according to claim 2 is the forgery prevention medium according to claim 1, wherein the transparent layer is an OVD layer.

  Furthermore, the invention according to claim 3 is the anti-counterfeit medium according to claim 1, wherein the transparent layer is an iris multilayer film in which two or more kinds of thin films are alternately laminated. It is characterized by.

  Furthermore, the invention according to claim 4 is the forgery prevention medium according to claim 1, wherein the transparent coating layer is made of a transparent varnish.

  Furthermore, the invention described in claim 5 is a forgery prevention seal characterized in that the forgery prevention medium according to any one of claims 1 to 4 is further provided with an adhesive layer.

  In the anti-counterfeit medium and the anti-counterfeit seal of the present invention, a printed layer and a transparent layer are provided in this order on a substrate, and a part of the surface of the transparent layer is mat-like and transparent. The covering layer is partially provided, and a pattern (character, symbol, figure, pattern, mark, etc.) is configured by a combination of these. Therefore, by covering the surface of the mat pattern surface with water or the like, it is possible to eliminate the scattering of light that has occurred in that portion and to erase characters and designs. Therefore, authenticity can be determined by using such a phenomenon and method. In addition, since it is possible to determine the authenticity using a relatively easily available medium such as water without using a special verifier, it can be expected to further enhance the forgery prevention effect.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory plan view showing the structure of the anti-counterfeit medium of the present invention, and FIG. 2 is an explanatory cross-sectional view taken along line XX of the anti-counterfeit medium of FIG. 3 is a plane state explanatory diagram showing how the anti-counterfeit medium shown in FIG. 1 is seen at the time of authenticity determination, and FIG. 4 is an XX line of the plane state explanatory diagram at the time of true / false determination shown in FIG. FIG.

  In the anti-counterfeit medium 1 of the present invention shown in FIG. 1 and FIG. 2, a printed layer 12 and a transparent layer 13 are provided in this order on a substrate 11, and a part of the surface of the transparent layer 13 is mat-like. In addition, the transparent coating layer 16 is partially provided, and a pattern (characters, symbols, figures, patterns, marks, etc.) 14 is constituted by a combination thereof.

  In the anti-counterfeit medium having such a configuration, light is scattered at a matte portion of the transparent layer 13 and the portion is recognized as a whitish pattern 14. However, for example, when the portion of the pattern 14 is wetted with water 17, the matte portion of the transparent layer 13 is covered with water 17 as shown in FIG. 4, and light scattering in the portion is eliminated. As shown, the pattern 14 disappears. By using such a phenomenon and a pattern disappearance method, it is possible to determine whether the image is true or false.

  Further, as shown in FIG. 4, in the anti-counterfeit medium 1 with the pattern disappeared, the pattern 14 of characters, symbols, etc. appears again by wiping off the water 17 or evaporating the water 17. Therefore, if this phenomenon is used, repeated true / false judgments can be made.

  The substrate 11 is made of paper, plastic, glass, metal or the like, and is not particularly limited to its constituent material. However, when used as a forgery prevention medium, it is better to appropriately select a material having processing suitability and sticking suitability.

  The printing layer 12 may be provided with ink that can be printed on the substrate 11, and the formation method is not particularly limited. In forming the printed layer 12, particularly when plastic or glass is used as the substrate 11, an adhesive layer may be interposed between them in order to strengthen the adhesion with the printed layer 12.

  On the other hand, the transparent layer 13 laminated on the printed layer 12 is a layer made of plastic, glass, etc., and at least a part of the surface is roughened like a mat so as to cause light scattering on the surface. It has become.

  For matting the surface of the transparent layer 13 made of plastic or glass, for example, a method of roughening the surface by sandblasting is employed.

On the other hand, the transparent coating layer 16 is provided on the transparent layer 13 to form a pattern by combining with the matte portion of the transparent layer 13. The forming material for forming the transparent coating layer 16 fills the surface roughness of the matte portion of the transparent layer 13 to increase the light transmittance in that portion, and is particularly water-resistant. The type is not limited. Specifically, a transparent varnish formed by converting a commonly used acrylic resin, polyester resin, polyurethane resin, epoxy resin or the like into an ink can be used. The transparent coating layer 16 may be provided by using such ink and printing characters, pictures, etc. in a white pattern by a conventionally known screen printing method, gravure printing method or the like.

  The forgery prevention medium of the present invention has been described above. Next, the forgery prevention seal of the present invention will be described.

  FIG. 5 is an explanatory plan view showing the structure of the anti-counterfeit seal of the present invention, and FIG. 6 is an explanatory cross-sectional view taken along line XX of the anti-counterfeit seal of FIG. FIG. 7 is an explanatory plan view showing how the anti-counterfeit seal shown in FIG. 5 is seen at the time of authenticity determination, and FIG. 8 is an XX line of the explanatory plan view at the time of true / false judgment shown in FIG. FIG.

  The anti-counterfeit seal 20 shown in FIGS. 5 to 8 is provided with at least a printing layer 22 and a transparent layer 23 in this order on one surface on a base material 21, and at least a part of the surface of the transparent layer 23. 1 has a mat-like shape and is partially provided with a transparent coating layer 26, and a combination of these forms a pattern 24 such as a character, a symbol, a figure, a picture, or a mark. It has the same structure as the forgery prevention medium 1 shown in FIG. However, they differ from each other in that an adhesive layer 25 is provided on the side of the substrate 21 where the printed layer 22 and the transparent layer 23 are not provided.

  The pressure-sensitive adhesive layer 25 can be formed using a general adhesive material as long as it does not alter or damage the substrate 21 in contact therewith. Specifically, vinyl chloride-vinyl acetate copolymer, polyester-based polyamide, acrylic-based, butyl rubber-based, natural rubber-based, silicon-based, polyisobutyl-based adhesive alone or alkyl methacrylate, vinyl ester, acrylonitrile, Addition of coagulating components such as styrene and vinyl monomers, unsaturated carboxylic acids, hydroxy group-containing monomers, modifying components such as acrylonitrile, polymerization initiators, plasticizers, curing agents, curing accelerators and antioxidants What added the agent as needed can be used.

  The pressure-sensitive adhesive layer 25 can be formed by a known gravure printing method, offset printing method, screen printing method, or other printing method, or a bar coating method, a gravure method, a roll coating method, or the like.

  Hereinafter, the present invention will be described in detail with specific examples.

  Print the entire surface of high-quality paper-based tack paper in red, and place a 25 μm thick sand mat PET (made by Teijin) film on which the adhesive is coated on the glossy surface so that the mat surface is located on the surface Laminated. Subsequently, a transparent varnish was printed in a white character pattern by screen printing on the mat surface of the sand mat PET constituting the laminated laminate, and the anti-counterfeit seal of the present invention according to Example 1 was applied. Obtained.

The entire surface of the high-quality paper-based tack paper was printed in red, and a transparent PET film having an adhesive layer on one side and having a thickness of 12 μm was laminated thereon. Subsequently, a character pattern having a negative-positive relationship with the white pattern of Example 1 was screen-printed with white ink on the surface of the obtained laminate, on which the adhesive layer of the transparent PET film was not provided. A counterfeit prototype according to Example 2 for comparison was obtained.

  When the anti-counterfeit medium of <Example 1> and the counterfeit prototype of <Example 2> were compared, there was no difference between them, and at first glance it was not possible to distinguish between genuine and counterfeit products. However, if water is added to both, the characters disappear in the anti-counterfeit medium of <Example 1>, and the characters in the <Comparison product> counterfeit prototype do not disappear, so the difference between the two is easy without using a verifier. I was able to confirm.

It is plane explanatory drawing which shows the structure of the forgery prevention medium of this invention. FIG. 2 is an explanatory cross-sectional view taken along line XX of the forgery prevention medium illustrated in FIG. 1. It is explanatory drawing of the planar state which shows the appearance at the time of authenticity determination of the forgery prevention medium shown in FIG. Sectional drawing in the XX of the plane state explanatory drawing at the time of authenticity determination shown in FIG. It is a plane explanatory view showing the composition of the forgery prevention seal of the present invention. FIG. 6 is a cross-sectional explanatory view taken along line XX of the forgery prevention seal shown in FIG. 5. It is explanatory drawing of the planar state which shows how it looks at the time of the authenticity determination of the forgery prevention seal | sticker shown in FIG. It is sectional drawing in the XX line of plane state explanatory drawing at the time of authenticity determination shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anti-counterfeit medium 11, 21 Base material 12, 22 Print layer 13, 23 Transparent layer 14, 24 Pattern 16, 26 Transparent coating layer 17 Water 25 Adhesive layer

Claims (5)

  On the substrate, at least a printing layer and a transparent layer are provided in this order, and at least a part of the surface of the transparent layer is mat-like and a transparent coating layer is partially provided. An anti-counterfeit medium characterized in that a pattern such as a character, a symbol, a figure, a picture, or a mark is constituted by a combination thereof.   The forgery prevention medium according to claim 1, wherein the transparent layer is an OVD layer.   The anti-counterfeit medium according to claim 1, wherein the transparent layer is an iris multilayer film in which two or more kinds of thin films are alternately laminated.   The anti-counterfeit medium according to claim 1, wherein the transparent coating layer is made of a transparent varnish.   An anti-counterfeit seal, wherein the anti-counterfeit medium according to claim 1 is further provided with an adhesive layer.