JP2008143116A - Forgery-discriminating printed matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printed matter with forgery and falsification preventing elements valid for forgery discrimination by applying a print pattern on transfer foil applied on a valuable printed matter. <P>SOLUTION: In the forgery-discriminating printed matter 1 applied with the transfer foil and the print pattern 4, the transfer foil is pasted on at least one portion of a base material, the print pattern 4 is printed on at least one portion of the transfer foil, and the print pattern 4 applied on the transfer foil becomes invisible when an observation angle is changed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical change element (hereinafter referred to as “transfer foil”) such as OVD, gold foil, and silver foil applied to banknotes, securities, passports, identification cards, cards, stamps, certificates, admission tickets, postcards, etc. This relates to a transfer provided with a forgery / tamper prevention element that is effective for authenticity determination by printing above.

  Transfer foil is affixed to many valuable products for the purpose of improving design and security. This is because it is possible to manufacture the transfer foil at a low cost even though it is difficult to copy the transfer foil (copying with a digital device such as a color copy). However, since hologram papers and holograms having an optical change effect are currently on the market, it has become easy to make a fake using these. This counterfeit can be easily discriminated if compared with the authentic one, but there is a case where the authenticity determination is mistaken if only the counterfeit is seen at a glance. Furthermore, when the transfer foil is directly attached to the substrate, it may be peeled off and misused.

  In such a technical background, a security with a hologram in which a different pattern (numbering) is engraved on each leaf like a split mark between a hologram and a paper surface has been proposed (for example, patent literature) 1).

  In addition, a thin piece is attached to a predetermined location on the securities, and a forgery-preventing uneven structure is formed on the thin piece by a printing method generally used in the manufacture of banknotes. Formed by a gap extending substantially parallel to the surface of the valuable document, at least a part of the gap being covered by a part of the anti-counterfeit mark, and the anti-counterfeit structure being significantly curved at least partly. When light is applied to the concavo-convex structure, the reflection of the light can be visually recognized. When the anti-counterfeit mark is peeled off from the valuable document, a crease is formed in the anti-counterfeit mark and the portion of the anti-counterfeit mark covering the gap is significantly deformed. The anti-counterfeit mark is detected when the anti-counterfeit mark is attached to another valuable document. Documents having the structure to improve the concrete safety has been proposed (e.g., see Patent Document 2).

  In addition, the hologram portion that reproduces a different image depending on the difference in the observation angle and the optically variable ink portion that expresses a different hue depending on the difference in the observation angle are provided close to each other, so that the hologram image and the hue of the reflected light are simultaneously changed depending on the observation angle. Therefore, there has been proposed a transfer foil that can easily determine the authenticity of the display body at first glance (see, for example, Patent Document 3).

  Further, a printing layer printed with an anti-counterfeit printing ink containing a lanthanoid rare earth compound is provided on a part of the OVD layer of the OVD forming body (an OVD layer and a printing layer are provided on the support of the transfer foil). Proposed a method to determine authenticity by comparing the color of the printed layer under the irradiation of the predetermined light and the color of the printed layer under the irradiation of light having a spectral distribution different from that of the predetermined light. (For example, see Patent Document 4).

  Further, a hologram transfer foil is pressed onto a base material in a shape constituting a part of a pattern, and a printed layer of a transparent or translucent ultraviolet curable ink is printed on the hologram transfer foil, the hologram transfer foil Is stamped into a shape that constitutes a part of the pattern, and a printed layer is formed on the hologram transfer foil, so that the pattern of the printed matter around which the hologram transfer foil is pressed may be difficult to see due to the reflection of the hologram transfer foil. There is also proposed a printed material that does not require a separate hologram transfer foil having a pattern synchronized with the printed pattern (see, for example, Patent Document 5).

  In addition, as the invention previously disclosed by the present applicant, on the hologram constituting layer, by constituting a pattern with ultraviolet curing and oxidative polymerization combined ink, the hologram peeling prevention function is improved, and the solvent resistance and The printed matter which improves friction resistance is proposed (for example, patent document 6).

JP 2000-355183 A Japanese Patent No. 3053209 JP-A-7-108788 JP 2002-46339 Registered Utility Model Publication No. 3025921 Japanese Patent Application No. 2005-123032

  All of the conventional techniques described above are characterized by the fact that the printed image line on the transfer foil can always be visually recognized. Therefore, the printed image line on the transfer foil is easily duplicated and is simple in terms of preventing forgery. is there.

  First, Patent Document 1 is characterized in that the information and the printing position are different for each sheet, and the printing position does not match when the pieces are aligned by making a split, so that it does not become regular information. In some cases, it is necessary to shift the printing position, and since there is a limit to the amount of shifting of the printing position, it is not possible to deal with mass-produced printed matter by a method other than numbering. Since the image printed on the hologram is always visible (visible information), the anti-counterfeiting power of the printed image itself is weak. In other words, the discriminability when the hologram is peeled off for some reason has a limit other than numbering, and it is not a configuration that improves the forgery prevention force by the printed image line on the hologram.

  In addition, Patent Document 2 is limited to the concavo-convex structure of the mark type, and the concavo-convex structure is produced by idle pressing or a transparent ink in a general intaglio printing method. As such, it is impossible to confirm and the discrimination is poor. Since the flake structure of the portion having the concavo-convex structure is damaged, the concavo-convex pattern is limited to those that do not impair the flake structure. In other words, when the flakes are peeled off for some reason, this is a technique for determining authenticity by the concavo-convex structure, and is not a configuration for improving the anti-counterfeiting power without damaging the flake structure.

  In Patent Document 3, the hue of the hologram image and the reflected light changes simultaneously depending on the observation angle. However, since the optical ink layer can always be visually recognized, the anti-counterfeiting power by the printed image line is weak. Since printing is performed only on the hologram in advance at the time of hologram production, it cannot be used in a split shape, has low versatility, and has a weak anti-counterfeiting power. That is, it is an invention relating only to the authenticity determination of the hologram itself, and is not a configuration that improves the anti-counterfeiting power by the discriminability when the hologram is peeled off for some reason and the printed image line on the hologram.

  Moreover, since patent document 4 can always visually recognize a printing part, the forgery prevention power of the printed image line itself is weak. Since printing is performed only on the OVD in advance at the time of OVD production, it cannot be used in a split shape, has low versatility, and has a weak anti-counterfeiting power. Since limited ink is used, a dedicated authenticator is required. In other words, it is a technique related only to the true / false discrimination by the machine, and is not a configuration for improving the anti-counterfeiting power without using a special device.

  In Patent Document 5, since printing on the hologram transfer foil is limited to transparent or translucent ink, this pattern is insufficiently confirmed as a color and has poor discrimination. The printed image line on the hologram transfer foil is intended to cover the sagging (burrs) of the outline of the hologram transfer foil by covering the hologram transfer foil by about 0.5 mm. It is not the purpose. In other words, it is a printed matter that eliminates the difficulty of seeing the image line due to the reflection of the hologram transfer foil by the print image line with transparent or translucent ink, and since it is not a technique for preventing forgery, there is no authenticity discrimination of the hologram transfer foil, The configuration is not such that authenticity determination is performed based on the printed image line on the hologram transfer foil.

  Further, although Patent Document 6 has a pattern on the hologram, the purpose is only to prevent the hologram from peeling and to improve solvent resistance and friction resistance. For this purpose, ultraviolet curing and oxidation polymerization combined ink It was printed using, and was not added with new anti-counterfeiting technology.

  Therefore, in order to solve the above problems, without using a special device for transparent ink and true / false discrimination, using ordinary colored ink, printing on the transfer foil without being bound by the printing method, Authenticity can be easily checked with the naked eye, difficult to counterfeit using a color copier or scanner, and authenticity discrimination that makes it difficult to counterfeit as the transfer foil is peeled off and attached to other securities The purpose is to provide printed matter.

  The present invention is an authenticity printed matter having a transfer foil and a printed pattern, wherein the transfer foil is affixed to at least a part of the substrate, and a part of the printed pattern is printed on at least a part of the transfer foil. Thus, the printed pattern applied on the transfer foil is an authenticity printed matter characterized in that it cannot be visually recognized by changing the observation angle.

  In addition, the present invention is a true / false discrimination printed matter characterized in that the concealment rate is 55% or less with respect to the transfer foil at a location where the print pattern applied on the transfer foil is concealed.

  In addition, the present invention is the authenticity discrimination printed matter characterized in that the printed pattern on the transfer foil has an ink film thickness of 10 μm or less.

  The present invention is also a true / false discrimination printed matter in which the printed pattern is a line, a character, a lattice, and / or a dot.

  In the authenticity discrimination printed material according to the present invention, the diffracted light of OVD can be observed (or the aluminum deposition portion is correct) by printing images, image lines, etc. composed of lines, dots, grids and characters on the OVD. When the printed pattern on the OVD is observed under the condition of (reflecting), the printed pattern becomes invisible, and the diffracted light of the OVD is not generated (or the reflection of the aluminum deposited portion does not occur) (the light source and the observation angle). When the printed pattern on the OVD was observed, the printed pattern became visible, and not only an optical change of the OVD but also a change in the visibility of the printed pattern was added, thereby improving the forgery prevention effect.

  Further, the authenticity determination printed material according to the present invention is captured in a state where the printed pattern does not appear on the OVD from the diffraction direction even if an image is captured by a copier, a color scanner, or the like. Is captured in a state of appearing on the OVD, so that the printed pattern disappears and cannot be copied.

  Moreover, the authenticity determination printed matter according to the present invention is invisible only to the pattern printed on the OVD surface (metal vapor deposition portion) by applying a printed pattern on the OVD or over the OVD and the base material (paper). Therefore, the camouflage effect can be brought about by changing the OVD surface and the pattern.

  In addition, the authenticity determination printed material according to the present invention is not limited in printing method, and since there is no restriction on the position and design of the printed pattern, a printed material with excellent design can be obtained.

  Hereinafter, the authenticity determination printed matter according to the present invention will be described with reference to FIGS. 1 to 8. However, the present invention is not limited to the best mode for carrying out the invention described below. Various other forms are included as long as they are within the scope of the ideal idea.

  FIG. 1 shows an authenticity printed matter 1 according to the present invention. In the authenticity determination printed matter 1, OVD3 is applied to a part of the base material 2, and a printed pattern 4 is applied to the OVD. In FIG. 1, the printed pattern 4 is printed across the OVD 3 and the substrate 2, but may be printed only on the OVD 3. In FIG. 1, the printed pattern 4 is formed by an image line, but it may be a character 5, a grid 6, or a point 7 as shown in a, b, and c of FIG. 2.

  The OVD 3 in FIG. 1 is a demetalized OVD, and includes a vapor deposition portion 3A and a non-vapor deposition portion 3B. For this reason, the vapor deposition portion 3A has a metallic luster, but the non-vapor deposition portion 3B is transparent. The OVD 3 sticking method described above uses an OVD sticking machine that optically reads a positioning mark (also referred to as a register mark) (not shown) of the OVD foil 8 having a plurality of OVD symbols and sticks it at a fixed position on a sheet. It is desirable to use it.

FIG. 3 is a detailed view of the cross section of the OVD foil 8 taken along the line XY of FIG. 1 showing the configuration of the OVD 3.
The OVD foil 8 includes a base film A, a release layer B, a protective layer C, an embossed layer D (including a vapor deposition portion 3A (aluminum portion) and a non-vapor deposition portion 3B (a portion not including aluminum)), an aluminum layer E And a masking layer F. Moreover, the protective layer C and the masking layer F use a transparent material, selects an acrylic resin, an acrylate resin, a urethane resin, etc. suitably, and the contact bonding layer G becomes a hot-melt agent. Moreover, since the embossed layer D is formed by depositing aluminum at a thickness of 500 to 1000 mm and the deposited portion 3A is protected by the masking layer F, the aluminum layer E remains in the same shape as the masking layer F. The aluminum is removed with an alkali solvent to make it transparent. The embossed layer D has a fine uneven structure, and is preferably a relief hologram suitable for mass production (a structure in which the shading of the interference fringes is replaced with unevenness on the surface).

  When the authenticity determination printed matter 1 is observed from an angle at which the diffracted light of the OVD 3 can be observed, the printed pattern 4 applied on the OVD 3 illustrated in FIG. This is because the reflected light 3G from the printed pattern 4 printed on the OVD 3 and the transmitted light 3H that has passed through the printed pattern from the vapor deposition portion 3A are small, and the reflection intensity is weaker than the OVD diffracted light 3F, so-called 3F> The state becomes 3G + 3H. Accordingly, only the OVD diffracted light 3F stronger than the reflected light 3G from the printed pattern 4 and the transmitted light 3H transmitted through the printed pattern 4 from the vapor deposition portion 3A is observed in the observation angle when the relationship of 3F> 3G + 3H is established. Therefore, the printed pattern 4 cannot be visually recognized.

  Further, when the regular reflected light 3J from the vapor deposition portion 3A of the OVD 3 of the authenticity discrimination printed matter 1 is observed from an observable angle, the printed pattern 4 applied on the OVD 3 cannot be visually recognized. This is because the reflected light 3G from the printed pattern 4 printed on the OVD 3 and the transmitted light 3H transmitted through the printed pattern 4 from the vapor deposition portion 3A are small, and more than the regular reflected light 3J from the vapor deposition portion 3A of the OVD 3. The so-called 3J> 3G + 3H state is obtained where the reflection intensity is weak. Therefore, at the observation angle when the relationship of 3J> 3G + 3H is established, the reflected light 3G from the printed pattern 4 and the positive light from the evaporated portion 3A of the OVD 3 stronger than the transmitted light 3H transmitted through the printed pattern 4 from the evaporated portion 3A. Since only the reflected light 3J enters the eyes, the printed pattern 4 cannot be visually recognized.

  On the contrary, when the OVD diffracted light 3F of the OVD 3 of the authenticity discrimination printed matter 1 and the regular reflection light 3J from the vapor deposition portion 3A are not generated, the color difference from the printed pattern 4 printed on the OVD 3 is clear. Therefore, the printed pattern 4 becomes visible. This is because diffracted light 3F of OVD and regular reflection light 3J from the vapor deposition portion 3A are not generated, so only reflected light 3G from the print pattern 4 and transmitted light 3H transmitted through the print pattern 4 from the vapor deposition portion 3A are observed. it can. That is, 3G + 3H> 3F = 3J = 0.

  When the OVD 3 of the authenticity discrimination printed matter 1 is copied from the diffraction direction and the non-diffractive direction with a copying machine, the OVD diffracted light 3F of the OVD 3 becomes white in the diffraction direction and does not shine in the non-diffractive direction and becomes black, so the printed pattern 4 Disappears.

  In addition, when OVD3 is captured from a diffraction direction and a non-diffractive direction by a color scanner, the diffraction direction turns white by OVD diffracted light 3F of OVD3, or the color by each diffraction grating shines, and the non-diffracting direction becomes black. Pattern 4 disappears.

  As described above, the principle of the present invention has been described. Regarding the change in the visual state of the printed pattern 4 applied on the OVD 3, the diffracted light 3F from the OVD 3 and the regular reflected light 3J from the vapor deposition portion 3A depending on the observation angle. Since the relationship with the reflected light 3G from the printed pattern 4 is important, the area where the printed pattern 4 shields the OVD 3 becomes a problem. The area ratio shielded by the printed pattern 4 applied on the OVD 3 is about 55% or less of the OVD. If the printed pattern 4 is a single line, the line width is 20 to 70 μm, preferably 20 μm. The image line interval is 20 to 100 μm, preferably 100 μm.

  When the printed pattern 4 is a character, the image line width is 30 μm and the character height is 250 μm. When the printed pattern 4 is a grid, the image line width is 10 to 50 μm, preferably 20 μm, and the image line interval. Is 60 to 90 μm, preferably 90 μm. When the printed pattern 4 is a dot, the diameter is 40 to 100 μm, preferably 40 μm, and the point interval is 10 to 100 μm, preferably 100 μm.

  The ink color of the printed pattern 4 applied on the OVD 3 is not particularly limited, but the height of the ink pile needs to be 10 μm or less. This is because the observation angle is changed with respect to the authenticity discrimination printed matter 1, and when the ink height is too high and the observation angle is changed, the OVD 3 is shielded by the ink, and the diffracted light 3F and the vapor deposition portion 3A. This is because the specularly reflected light 3J is not generated.

  In the authenticity determination printed matter 1 of the present invention, the printing method of the printed pattern 4 applied on the OVD 3 is not particularly limited, and may be appropriately selected from offset printing, screen printing, gravure printing, intaglio printing, letterpress printing, and the like.

  In the authenticity printed matter 1 of the present invention, the ink for printing the printed pattern 4 applied on the OVD 3 may be an ink suitable for the above-described various printing methods. In particular, an ultraviolet ray that dries the ink film by ultraviolet irradiation. It is preferable to use a curable offset ink.

  As for the OVD 3 constituting the authenticity discrimination printed matter 1 of the present invention, if the metal is vapor-deposited and has a metallic luster, and the OVD diffracted light 3F and the regular reflection light 3J from the metal vapor-deposited portion are obtained, the entire surface vapor-deposited foil or demetalized foil Either of them may be used. In addition, about the metal material which carries out metal vapor deposition, aluminum, gold | metal | money, silver, chromium, nickel, lead, etc. are mentioned.

  About the base material used for the authenticity determination printed matter 1 of this invention, OVD3 should just be affixed, such as paper, a plastics, a film, or cloth.

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

(Example 1)
FIG. 5 shows authenticity printed matter A1 of the present invention. Authenticity discrimination printed matter A1 is obtained by printing OVD3 of demetalized foil using aluminum as a vapor deposition material on paper base material 2 and line pattern 9 so as to straddle OVD3 and paper base material 2. . As shown in FIG. 6A, the line width 4A of each line is 20 μm, the line interval 4B is 100 μm, and printing was performed by the offset printing method. The ink used is a blue UV curable offset ink.

  When the produced authenticity discrimination printed matter A1 is observed from an angle at which the diffracted light 3F of the OVD 3 is generated, the line 9 applied on the OVD 3 is not visible as shown in FIG. 6A, and the diffracted light 3F of the OVD 3 is not visible. When observed from an angle at which no occurrence occurs, the line 9 on the OVD 3 was clearly confirmed as shown in FIG.

  Further, when the authenticity determination printed matter A1 was duplicated by a copying machine, the lines applied on the OVD were not reproduced as shown in FIG. 6C.

(Example 2)
FIG. 7 shows the authenticity printed matter A2 of the present invention. The authenticity determination printed matter A2 is printed on the paper base material 2 with the OVD 10 of the entire surface evaporation foil using aluminum as the evaporation material and the characters 11 arranged only on the OVD 10. The printing of characters was a screen printing method, the character height 4C was 250 μm, and the width 4D of the image lines constituting the characters was 30 μm. The ink used was a yellow UV curable screen ink.

  An image was acquired from the produced authenticity discrimination printed matter A2 by a color scanner from the OVD diffraction direction. As shown in FIG. 8, in the acquired image, only characters on the OVD were not acquired.

It is the top view and sectional drawing which show an example of the authenticity determination printed matter which affixed OVD on the base material by this invention, and performed printing on OVD. It is an example of printing in the authenticity discrimination printed matter of the present invention. It is sectional drawing of the OVD foil in this invention. It is a principle figure in the present invention. 1 is a plan view of a true / false discrimination printed matter showing Example 1 of the present invention, in which demetalized OVD is pasted on a paper substrate, and a line pattern is applied by offset printing so as to straddle the demetalized OVD and the substrate. FIG. It is a top view at the time of observing and copying OVD of Example 1 of this invention. It is Example 2 of this invention, and is a top view of the authenticity discrimination | determination printed matter which stuck the whole surface vapor deposition OVD on the paper base material, and screen-printed the character only on the whole surface vapor deposition OVD. It is a top view at the time of acquiring OVD of Example 2 of this invention with a color scanner.

Explanation of symbols

1 Authenticity printed matter 2 Base material 3 OVD
3A, 3C Evaporation part 3B, 3D Non-evaporation part 3E, 3F OVD diffracted light 3G Reflected light 3H from the printed pattern part Reflected from the evaporated part, transmitted light from the printed pattern 3J Regularly reflected light from the evaporated part 4 Printed pattern 4A Line width 4B Line interval 4C Character height 4D Line width 5 Character 6 Grid 7 Point 8 OVD foil 90,000 line pattern 10 OVD
11 Character A Base film B Release layer C Protective layer D Emboss layer E Aluminum layer F Masking layer G Adhesive layer

Claims (4)

A printed matter for authenticating authenticity having a transfer foil and a printed pattern, wherein the transfer foil is affixed to at least a part on a substrate, and a part of the printed pattern is printed on at least a part of the transfer foil. Thus, the printed pattern applied on the transfer foil cannot be visually recognized by changing the observation angle. The authenticity determination according to claim 1, wherein the printed pattern applied on the transfer foil has a concealment rate of 55% or less with respect to the transfer foil at a location concealed by the printed pattern. Printed matter. The authenticity discrimination printed matter according to claim 1, wherein the printed pattern formed on the transfer foil has an ink film thickness of 10 μm or less. The authenticity printed matter according to claim 1, 2, or 3, wherein the printed pattern is a line, a character, a lattice, and / or a dot.

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