JP4121117B2 - Anti-counterfeiting form - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a voucher-like value such as a gift certificate, and particularly to a voucher that has been subjected to anti-counterfeit processing.
[0002]
[Prior art]
At present, many forms such as gift certificates, admission tickets, and securities are in circulation, but these forms have the value of cash vouchers, so they are easy to be counterfeited by copiers, and so on. It is necessary to apply anti-counterfeiting. Therefore, examples of anti-counterfeiting processing that has been conventionally employed include the following.
[0003]
(A) A foil-pressing process in which a metal foil such as aluminum is pressed and heated on a foil-pressed sheet. When copied by a copying machine, the portion of the metal foil is copied in black.
[0004]
(B) A difference in the reflection angle of the hologram light is used, and a transparent hologram film label is pasted on the paper. When copying with a copy machine, the light reflected on the light scattering surface of the hologram enters the light receiving part of the copier and is copied in white, and the light reflected on the regular reflection surface of the hologram does not enter the light receiving part of the copier. Copied in black.
[0005]
(C) The difference between the size of halftone dots and the resolution of the copying machine is used, and characters are represented by large halftone dots in a small halftone dot area on the paper. This character cannot be seen with the naked eye because it is buried in a small halftone dot, but when copied by a copying machine, the small halftone dot is not copied and only the large halftone dot is copied, so that the character appears to be raised.
[0006]
(D) Using temperature indicating ink (thermochromic ink) that changes color with thermochromic ink temperature, print an image such as a pattern on paper, and print a camouflage pattern with thermochromic ink on it. hide. When you touch this ink with your finger, it changes color due to body temperature, making it impossible to faithfully reproduce the background pattern.
[0007]
However, the conventional anti-counterfeiting process has the following problems. For example, in the case of (i) foil stamping and (d) thermochromic ink, the processing is complicated and time-consuming, so the productivity is poor. In addition, the hologram film label (b) has a relatively large forgery prevention effect, but its unit price is high, and in the case of producing a large amount of forms at a time like an admission ticket, it causes a significant cost increase. Furthermore, according to a high-resolution copying machine that has made rapid progress in recent years, it is possible to make an exact copy that is as close as possible to the real thing. It is easily duplicated.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of such problems, and an object of the present invention is to provide a form that can be easily and inexpensively processed and can reliably prevent forgery by a color copier. is there.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, an anti-counterfeit form according to the present invention is a form in which predetermined information is printed on a sheet, and the sheet is provided with a metal paste ink layer mixed with metal powder. When the paste ink layer is scratched, a metallic luster that cannot be copied appears.
[0010]
The anti-counterfeit form according to the present invention is a form in which predetermined information is printed on a sheet, the sheet is provided with a true / false discrimination column, and the true / false discrimination column is a metal paste ink mixed with metal powder. And a concealing layer formed of a printing ink having the same color and the same texture as the metal paste ink on the periphery or the entire surface of the discrimination layer. The discriminating layer having an impossible metallic luster appears so as to appear.
[0011]
In general, the metal powder mixed in the vehicle of the metal paste ink includes silver powder and carbon powder. In the present invention, silver powder is used. This is because carbon powder does not emit metallic luster while silver powder has good metallic luster and is suitable for authenticity determination. It should be noted that a metal paste ink in which other metal powders are mixed in the vehicle may be used as long as it produces a metallic luster when scratched. In addition, metal powders such as silver powder are prone to oxidization, and are susceptible to metal gloss deterioration and discoloration when affected by moisture, heat, gas, etc. Accordingly, it is preferable that an antioxidant such as a pH adjuster, a phenol-based resin, a phosphorus-based resin, a sulfur-based resin, or an oil or fat is contained.
[0012]
On the other hand, the hiding layer is formed using an ink having the same color and the same texture as the metal paste ink in order to make the discrimination layer invisible. For example, in addition to printing inks such as ultraviolet curable (UV) inks and oxidation polymerization type inks in which the metal powder is not mixed in the pigment, the metal powder such as aluminum powder or brass powder is contained in the pigment so as not to give a metallic luster. Printing ink mixed in by volume can be used. In addition, also when the metal powder is mixed in the printing ink which forms a concealing layer, it is desirable to contain the above antioxidant from a viewpoint of preventing oxidation.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of an anti-counterfeit form according to the present invention will be described in detail with reference to the accompanying drawings, taking an example in which the present invention is applied to a gift certificate.
[0014]
<First Embodiment>
FIG. 1 is a plan view showing the configuration of a first embodiment of a gift certificate to which the present invention is applied, and FIG. 2 is a cross-sectional view showing the configuration of the gift certificate.
[0015]
As shown in FIGS. 1 and 2, the gift certificate 10 of the present embodiment includes a gift certificate display field 2 indicating that the ticket is a gift certificate, an expiration date display field 3 on a sheet 1 formed in a required shape. In addition, forgery prevention processing is applied to a ticket surface on which items such as an amount display column 4 indicating the monetary value of the ticket are printed.
[0016]
This anti-counterfeiting process is to provide a metal paste ink layer 5 on which various metal pastes are printed with ink. This metal paste ink is a screen ink, and the solid component content is usually as high as about 70%, and the printing method of the metal paste ink is printed by screen printing using a stencil. Is formed. Further, the metal paste ink layer 5 has a matte shape with no metallic luster in a normal state.
[0017]
The gift certificate 10 according to the present embodiment determines whether the gift certificate 10 is genuine or fake depending on the presence or absence of metallic luster that appears when the metal paste ink layer 5 fixed on the ticket surface is scratched. Is to do.
[0018]
In general, the metal powder mixed in the vehicle of the metal paste ink includes silver powder and carbon powder. In this embodiment, silver powder is used. This is because carbon powder does not emit metallic luster while silver powder has good metallic luster and is suitable for authenticity determination.
[0019]
Further, as the metal paste ink, metal paste ink in which other metal powders are mixed in the vehicle may be used as long as it produces a metallic luster when scratched after ink fixing. As a commercially available metal paste ink, “Dotite” (trade name, manufactured by Fujikura Kasei Co., Ltd.), which is an ink having silver paste and other various color metal pastes, can be used.
[0020]
Metal powder such as silver powder has a property of being easily oxidized, and when it is affected by moisture, heat, gas, etc., the metal gloss is likely to be lowered or discolored. Therefore, it is preferable that the metal paste ink contains an antioxidant such as a pH adjuster, a phenol-based resin, a phosphorus-based resin, a sulfur-based resin, and fats and oils as necessary in order to prevent oxidation by the vehicle.
[0021]
A ruled line is constituted by such a metal paste ink layer 5 on the ticket surface of the gift certificate 10 of the present embodiment. Even if the gift certificate 10 is copied with a color copying machine, the metallic luster unique to the metal paste ink cannot be faithfully reproduced, so that counterfeiting by copying can be reliably prevented. Therefore, the authenticity determination method of the gift certificate 10 is such that the ruled line is scratched with a nail or a coin and the glossy one uses a metal paste ink so that it is genuine and the one that does not gloss is like this Since the metal paste ink is not used, it is possible to easily determine whether it is a fake or not.
[0022]
Further, the metal paste ink layer 5 printed with the metal paste ink is not limited to the ruled line, and may be provided in the gift certificate display field 2 and the expiration date display field 3, for example.
[0023]
Furthermore, as a true / false determination method, the presence or absence of the appearance of metallic luster can be clearly seen with the naked eye, so it may be performed individually by visual inspection. For example, a scratch portion for scratching the metal paste ink on the reader, and light reflection It is also possible to provide a reading unit for reading the rate and read the fact that the light reflectance of the metal paste ink layer changes greatly when scratched, so that it can be discriminated by a machine. In this case, data representing the relationship between the blending ratio of the metal powder mixed in the metal paste ink and the light reflectance is prepared in advance, and based on this data, the light reflectance of the form is read to determine authenticity. You should do it.
[0024]
As described above, according to the present embodiment, it is possible to perform anti-counterfeiting processing on a form by a simple method that is simply screen-printed using a metal paste ink in which a metal powder is blended at a unique ratio, and light reflection. By reading the difference in the rates and comparing the authenticity, it is possible to determine the authenticity with higher accuracy.
[0025]
Second Embodiment
3 is a plan view showing the configuration of a second embodiment of a gift certificate to which the present invention is applied, FIG. 4 is a cross-sectional view showing the configuration of the gift certificate, and FIG. 5 is a plan view showing a state in which the gift certificate is scratched. is there. In addition, since the basic structure of the gift certificate of this embodiment is the same as that of 1st Embodiment mentioned above, the same code | symbol is attached | subjected to the same member and the detailed description is abbreviate | omitted.
[0026]
As shown in FIG. 3 and FIG. 4, the gift certificate 10 of the present embodiment is provided with a genuineness determination column 6 for determining whether it is genuine or counterfeit on the ticket surface. It is characterized by being given.
[0027]
The authenticity determination column 6 includes a determination layer 6-1 for determining whether the gift certificate 10 is genuine or a fake, and a concealment layer 6-2 for concealing the determination layer 6-1 so that it cannot be seen in a normal state. It consists of and.
[0028]
The discrimination layer 6-1 is composed of characters, symbols, patterns, etc., and the discrimination layer 6-1 of this embodiment is screen-printed with a metal paste ink in which a metal powder such as silver powder is mixed in a vehicle. Thus, the letters “OK” representing that the gift certificate 10 is genuine are formed. That is, the metal paste ink used for printing of the discrimination layer 6-1 is the same as the metal paste ink described in the first embodiment.
[0029]
On the other hand, the concealing layer 6-2 is formed so as to cover the periphery of the discrimination layer 6-1 or the entire surface of the discrimination layer 6-1 so that the characters of the discrimination layer 6-1 cannot be seen in the normal state. Is. That is, the concealing layer 6-2 is formed by solid-printing printing ink having the same color and texture as the metal paste ink used for printing of the discrimination layer 6-1.
[0030]
Here, as the ink having the same color and the same texture as the metal paste ink, a normal printing ink such as an ultraviolet curable (UV) ink or an oxidation polymerization type ink in which the metal powder is not mixed in the pigment, or aluminum as the pigment. Printing ink in which powder or metal powder such as brass powder in which copper and zinc are blended is mixed in such a content that does not emit metallic luster after scratching can be used. When aluminum powder is used as the pigment, a silver printing ink is obtained, and when brass powder is used, a gold printing ink is obtained.
[0031]
These normal printing inks have a relatively low solid component content of usually about 15 to 50%, and can be printed by various printing methods such as relief printing and offset printing.
[0032]
In the case where metal powder is mixed in the printing ink for forming the concealing layer 6-2, from the viewpoint of preventing oxidation, the printing ink contains an antioxidant as described above in the same manner as the metal paste ink. It is desirable that
[0033]
When a commercially available ink is used, for example, a silver paste of “Dotite” (trade name, manufactured by Fujikura Kasei Co., Ltd.) series is used as the metal paste ink for printing of the discrimination layer 6-1. For example, “NVR” (trade name, manufactured by T & K TOKA) can be used as printing ink having the same color and texture as the metal paste ink.
[0034]
Thus, in the authenticity discrimination column 6 of the gift certificate 10, since the discrimination layer 6-1 and the concealment layer 6-2 are printed with inks having the same texture, what characters are printed visually. Even if the gift certificate 10 is copied with a color copier, the metallic luster peculiar to the metal paste ink forming the discrimination layer 6-1 cannot be faithfully reproduced. Can be prevented.
[0035]
FIG. 5 shows a state where the authenticity determination column 6 of the gift certificate 10 is scratched with a nail or a coin. As shown in the drawing, the metal paste ink forming the discrimination layer 6-1 emits a metallic luster because a large amount of metal powder such as silver powder is mixed therein. On the other hand, the printing ink for forming the concealing layer 6-2 may contain a metal powder such as an aluminum powder or a brass powder mixed with an ultraviolet curable ink or an oxidation polymerization type ink. The content does not cause metallic luster. Therefore, the standard for authenticity determination becomes clear, such as a gift certificate in which the letter “OK” that emits metallic luster appears genuine, and a gift certificate in which such a letter with metallic luster does not appear is fake. Authenticity can be easily and reliably determined.
[0036]
Furthermore, as an example of the ink used for forming the authenticity discrimination column 6, the discrimination layer 6-1 is printed with a metal paste ink mixed with metal powder, and the same color as this metal paste ink and different metals. The concealing layer 6-2 can also be printed with a metal paste ink mixed with powder. According to such a configuration, when the authenticity discrimination column 6 is scratched, the discrimination layer 6-1 that emits a metallic luster and the concealing layer 6-2 that emits a metallic luster having a light reflectance different from that of the discrimination layer 6-1. Appears as a background.
[0037]
Therefore, the reader is provided with a scratch part that scratches the authenticity determination column 6 and a reading unit that reads the light reflectance, and the authenticity determination column 6 is scratched to detect the light of the determination layer 6-1 and the concealing layer 6-2. If the discrimination layer 6-1 is read based on the difference in reflectance, it is possible to perform true / false discrimination with high accuracy by a machine.
[0038]
In each of the above-described embodiments, an example in which the forgery prevention form according to the present invention is applied to a gift certificate has been described.However, the present invention is not limited to other forms such as an admission ticket, securities, and an identification card. Forms that are likely to be counterfeited by a color copier are subject to application, and counterfeiting of these forms can be effectively prevented.
[0039]
【The invention's effect】
As described above in detail, the forgery prevention form according to the present invention has the following effects.
[0040]
The form paper is provided with a metal paste ink layer mixed with metal powder. By scratching this metal paste ink layer, a metallic luster peculiar to metal paste ink that cannot be copied appears. Thus, even the metal paste ink layer cannot be faithfully reproduced, and forgery by copying can be surely prevented.
[0041]
In addition, for example, in order to print the discrimination layer with metal paste ink and make the discrimination layer invisible, the true color in which the concealing layer is printed with printing ink having the same color and the same texture as the metal paste ink on the periphery or the entire surface of the discrimination layer. A false discrimination column can also be provided. When this authenticity discrimination field is scratched, the discrimination layer emits a metallic luster that cannot be copied by a color copier, and the concealing layer does not emit such a metallic luster. In other words, a gift certificate in which no distinction layer appears is a fake, and the criteria for authenticity determination are clear, and authenticity determination can be performed more reliably.
[Brief description of the drawings]
FIG. 1 is a plan view showing a configuration of a first embodiment of a gift certificate to which the present invention is applied.
FIG. 2 is a cross-sectional view showing the configuration of the gift certificate of FIG.
FIG. 3 is a plan view showing a configuration of a second embodiment of a gift certificate to which the present invention is applied.
4 is a cross-sectional view showing the configuration of the gift certificate in FIG. 3;
FIG. 5 is a plan view showing a state where the gift certificate of FIG. 3 is scratched.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Paper 2 Gift certificate display column 3 Expiration date display column 4 Amount display column 5 Metal paste ink layer 6 Authenticity discrimination column 6-1 Discrimination layer 6-2 Concealment layer 10 Gift certificate (counterfeit prevention form)

Claims (7)

A form with predetermined information printed on paper,
The paper is provided with a metal paste ink layer mixed with metal powder, and when the metal paste ink layer is scratched, it is configured so that a non-copyable metallic luster appears. Forms. A form with predetermined information printed on paper,
The paper is provided with a true / false discrimination column,
The true / false discrimination field
A discriminating layer formed by a metal paste ink mixed with metal powder;
A concealing layer formed of a printing ink having the same color and texture as the metal paste ink on the periphery or the entire surface of the discrimination layer;
Have
An anti-counterfeit form characterized in that, when the authenticity discrimination field is scratched, a non-copyable metallic luster discrimination layer appears.   3. The forgery prevention form according to claim 1, wherein the metal powder is silver powder.   4. The forgery prevention form according to claim 2, wherein the concealing layer is formed of printing ink in which metal powder is not mixed in the pigment.   3. The masking layer according to claim 2, wherein the concealing layer is formed of a printing ink in which a metal powder made of aluminum powder or brass powder is mixed in the pigment so as not to have a metallic luster after scratching. Item 3. A forgery prevention form according to item 3. The counterfeit prevention form according to any one of claims 1 to 5, wherein the metal paste ink contains an antioxidant. 6. The forgery prevention form according to claim 5, wherein the printing ink mixed with the metal powder contains an antioxidant.

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