JP2001088425A - Forgery deciding medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forgery deciding medium adapted to a large quantity and rapid issue and capable of simply deciding a forgery and particularly easily sorting a copy product by a color copier. SOLUTION: The forgery deciding medium comprises a base material 11, a colored layer 12 formed on the material 11 and absorbably colored at a light, a light separating and reflecting layer 13 formed on the layer 12 to reflect a light a of a specific color of an incident light and to transmit a light b of its complementary color, and a decision information layer 16 formed on the layer 13 to display decision information 16a having substantially the same color as the layer 12 and becoming difficult to decide due to familiarizing with the color of the layer 12 as seen from a predetermined direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterfeit discrimination medium which can easily discriminate a counterfeit product of a medium for printing attribute information immediately before issuance, such as a ticket, a commuter pass, and an admission ticket.

[0002]

2. Description of the Related Art Conventionally, in a ticket, a commuter pass, an admission ticket, etc., in order to prevent forgery, a copy-forgery-inhibited pattern such as a fine character or a mark is printed, and attribute information such as an expiration date and an effective section are further printed thereon. It is printed. However, due to the recent performance improvement of color copiers, some tint block and fine marks can be copied as well as the real ones.
It's getting very difficult. Therefore, Japanese Unexamined Patent Publication No.
JP-A-02899 discloses that a printed film or a transfer foil provided with an outer surface exhibiting iris interference fringes is adhered to the surface,
A method has been proposed in which transcription is prevented to prevent forgery.

[0003]

However, in the above-mentioned method, since a printing film or a transfer foil must be prepared in advance and bonded each time, it is as fast as a ticket, a commuter pass, and an admission ticket. Those that had to be issued in large quantities were not suitable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a forgery discrimination medium which can easily discriminate a counterfeit product, in particular, can easily identify a copy product in a color copying machine, and is suitable for large-volume, high-speed issuance. To provide.

[0005]

The present invention solves the above-mentioned problems by the following means. In addition, in order to make it easy to understand, description is given with reference numerals corresponding to the embodiment of the present invention, but the present invention is not limited to this. In order to solve the above problem, the invention according to claim 1 includes a substrate (1)
1), a colored layer (12) formed on the base material (11) and colored so as to absorb light, and a light of a specific color (incident light) formed on the colored layer (12). a) and reflects the light (b) of the complementary color thereof.
3), which is formed on the light separating / reflecting layer (13) and has substantially the same color as the colored layer (12), and when viewed from a predetermined direction, adapts to the color of the colored layer (12) and is difficult to determine. And a determination information layer (16) for displaying determination information (16a).

According to a second aspect of the present invention, in the counterfeit discrimination medium according to the first aspect, the colored layer (12) is dark, and the determination information layer (16) is also substantially the same dark color. Is a forgery discrimination medium.

[0007] The third aspect of the present invention is the first or second aspect.
The forged discrimination medium according to the above, wherein the colored layer (12)
Is a forgery discrimination medium characterized by being formed of a black magnetic recording layer.

According to a fourth aspect of the present invention, there is provided a substrate (11), a colored layer (12) formed on the substrate (11) and colored to reflect light, and formed on the colored layer (12). The light separation / reflection layer (13) that reflects light (a) of a specific color out of the incident light and transmits the light (b) of the complementary color, and the light separation / reflection layer (13). , Its light separating / reflecting layer (1
(B) light transmitted through 3) and reflected by the colored layer (12)
And a determination information layer (16) for displaying determination information (16a) which is substantially the same color as the color of the reflected light (b) and becomes difficult to determine due to the reflected light (b).

[0009] The invention of claim 5 is the invention of claims 1 to 4.
The forged discrimination medium according to any one of the above, wherein the colored layer (12) displays a tint block.

[0010]

Embodiments of the present invention will be described below in more detail with reference to the drawings. (First Embodiment) FIG. 1 is a diagram showing a first embodiment of a forgery discrimination medium according to the present invention, wherein FIG. 1 (A) is a plan view, and FIG. 1 (B) is BB of FIG. 1 (A). FIG. The counterfeit discrimination medium 10 is an example of a commuter pass, and includes a base material 11
, A colored layer 12, a light separating / reflecting layer 13, and an image receiving layer 14.
, Background pattern layer 15, determination information layer 16, magnetic recording layer 17
, A printing layer 18 and a protective layer 19.

The base material 11 is a base material serving as a carrier of the counterfeit discrimination medium 10. The base material 11 is made of a generally used plastic material (eg, polyethylene terephthalate (PET), polyethylene (PE),
Polypropylene (PP), polyvinyl alcohol (PV
AL), polyvinyl chloride (PVC), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene copolymer (AS), polymethyl methacrylate (PMMA), cellulose acetate butyrate (CAB) , Cellulose propionate (CP), etc.) or paper (for example, high quality paper, art paper, coated paper, synthetic paper, etc.) can be suitably used. The thickness of the substrate 11 can be freely selected according to the application. In the present embodiment, the base material 11 is
188 μm thick white polyethylene terephthalate (P
ET).

The coloring layer 12 is a layer colored with a color that absorbs light transmitted through the light separating / reflecting layer 13, and is formed on the substrate 11. The coloring layer 12 is formed by applying black ink. The coloring layer 12 is formed uniformly on the entire surface of the substrate 11. In this case, the coloring layer 12 may be printed with a gravure coat. The coloring layer 12 may print a tint block or a pattern, and in this case, offset printing is preferable.

The light separating / reflecting layer 13 is a layer that reflects light of a specific color out of the incident light and transmits light of a complementary color, and is formed on the colored layer 12. Light separation / reflection layer 13
Is, for example, a vinyl chloride-vinyl acetate copolymer (EV
A) A pearl pigment in which a layer of silicon oxide, titanium oxide, iron oxide or the like having a high refractive index and a layer of mica or the like having a low refractive index are laminated in a transparent vehicle such as A) is dispersed. It can be formed by applying an ink containing. Examples of the additive include an antifoaming agent for preventing poor application due to bubbling of the ink, and curing and release of the ink.
There is a curing agent for preventing scratches and the like. As the defoaming agent, acrylic ones are suitable, and as the curing agent,
Isocyanate-based ones are preferred. Specific examples of the pearl pigment include Shiseido's trade name; Infinite Color and Merck (Germany) 's trade name; Iliodin. The light separating / reflecting layer 13 can be formed of such a light separating / reflecting ink by gravure printing, coating or stencil printing, and the thickness thereof is about 1 to 8 μm. About 5 μm.

The image receiving layer 14 is a resin layer for improving the adhesion of the copy-forgery-inhibited pattern layer 15 and the determination information layer 16 to the light separation / reflection layer 13, and is formed on the light separation / reflection layer 13. The material of the image receiving layer 14 is a vinyl chloride-vinyl acetate copolymer,
It is a simple substance or a mixture of resins such as polyester, urethane, and acryl. A curing agent such as isocyanate and an additive such as wax are mixed as necessary. Image receiving layer 1
4 can be formed by gravure coating or stencil printing (silk printing or the like), and its thickness is 0.5 to 6 μm.
It is about. In the present embodiment, it is formed with a thickness of about 1 to 2 μm by gravure coating.

The copy-forgery-inhibited pattern layer 15 is a layer for displaying a copy-forgery-inhibited pattern, such as a halftone dot, a grain, a color pattern, and a company logo mark, and is formed on the image receiving layer 14. The material of the ground tint layer 15 is an ultraviolet curable ink containing a pigment or a acrylate as a main component, in which a pigment is dispersed in a simple substance or a mixture of resins such as vinyl chloride-vinyl acetate copolymer, polyester, urethane, and acryl, and If necessary, additives such as wax are mixed. The ground tint layer 15 can be formed by offset printing, gravure printing, stencil printing, or the like, and has a thickness of about 0.5 to 4 μm. In the present embodiment, a thickness of 1
２2 μm.

The judgment information layer 16 is a layer for displaying the judgment information 16a in black, which is substantially the same as the color of the colored layer 12. The determination information layer 16 displays attribute information such as the expiration date and valid section of the commuter pass as the determination information 16a.

The magnetic recording layer 17 is a layer formed on the back surface of the base material 11, and records attribute information such as a term of validity and a valid section of the commuter pass as magnetic data. Magnetic recording layer 17
Is γ-Fe ₂ O ₃ , Co-coated γ-Fe ₂ O ₃ , Fe ₃
O ₄ , Fe—Cr, Fe—Co, Co—Cr, Co—N
a dispersion of a magnetic material such as i, Ba-ferrite, Sr-ferrite, or CrO ₂ dispersed in a suitable resin or ink vehicle by a method such as a gravure method, a roll method, or a knife edge method; or Fe, Fe-Cr, Fe-C
It can be formed by a vacuum evaporation method, a sputtering method, a plating method, or the like using a metal or alloy such as o, Co—Cr, or an oxide thereof.

The printing layer 18 is a layer formed on the magnetic recording layer 17 and displays a notice or the like. The print layer 18 is printed with white characters on the black magnetic recording layer 17 for easy viewing.

The protective layer 19 is a layer for improving the durability by preventing the print layer 18 from being scratched or from being stained by printing, and is formed on the entire back surface of the counterfeit discrimination medium 10. The ink component forming the protective layer 19 is an acrylate, and is formed by offset printing. The thickness of the protective layer 19 is
It is about 1-2 μm.

FIG. 2 shows a first example of a forgery discrimination medium according to the present invention.
It is a figure showing the light separation reflection layer of an embodiment. The light separation / reflection layer 13 is formed by applying an ink in which a pearl pigment 13a in which a high refractive index layer and a low refractive index layer are laminated is dispersed in a transparent medium 13b. As shown in FIG. 2A, of the incident light, light a reflected by the pearl pigment 13a
Is emitted in the direction of an angle α, and the light b transmitted through the pearl pigment 13 a is absorbed by the colored layer 12. For this reason, when the forgery determination medium 10 is viewed from the α direction, it looks like the color of the reflected light, but when viewed from another angle, it looks dull.

The relationship between the reflected light and the transmitted light of the pearl pigment 13a is a complementary color relationship. As shown in FIG. 2 (B), depending on the thickness of the pearl pigment 13a, any one of the wavelengths of visible light is changed. Interference results in the following combinations:

[Table 1] Pigment thickness (nm) Reflected light Transmitted light (1) Approx. 60 Silver Transparent (2) Approx. 90 Gold Purple (3) Approx. 115 Red Green (4) Approx. 128 Purple Yellow (5) Approx. 143 Blue Orange (6) Approx. 170 Green Red

As described above, the light separating / reflecting layer 13 exhibits different colors depending on the pearl pigment contained therein. In this embodiment, the pearl pigment (2) in Table 1 above (specifically, Iriodin 201 (Ruti manufactured by Merck, Germany)
le Fire Gold)), and when viewed from a certain angle, the counterfeit discrimination medium 10 looks golden,
When viewed from another angle, it becomes dull, and the judgment information layer 1
6 makes it difficult to see the attribute information such as the expiration date.
Also, when a copy is made with a color copying machine, the background is dull and the judgment information 16a of the judgment information layer 16 is difficult to see.

According to this embodiment, depending on the viewing angle,
Since the counterfeit discrimination medium 10 becomes dull, the counterfeit discrimination can be easily performed. In particular, since the determination information 16a of the determination information layer 16 is difficult to see, forgery determination can be reliably performed. Further, in the case of a color copy product, the judgment information 16a becomes difficult to see due to the dull color background, so that it is possible to easily identify a fake product. Further, if the colored layer 12 is formed of a tint block or the like, the color changes only in that portion, so that the forgery can be easily distinguished with excellent design.

(Second Embodiment) FIG. 3 is a cross-sectional view showing a counterfeit discrimination medium according to a second embodiment of the present invention. In addition,
In the embodiments described below, portions that perform the same functions as those in the above-described first embodiment will be denoted by the same reference numerals, and redundant description will be omitted as appropriate. The counterfeit discrimination medium 10 includes the base material 1
1, a black magnetic recording layer 17 capable of absorbing light, a light separating / reflecting layer 13, an image receiving layer 14, a ground pattern layer 15, a determination information layer 16, a printing layer 18, and a protective layer 19.

The magnetic recording layer 17 is a black magnetic layer, which is provided on the surface of the substrate 11.
3 is absorbed without being reflected. Therefore, of the incident light, the light a reflected by the pearl pigment 13a of the light separating / reflecting layer 13 is emitted in a certain angle α direction and presents a specific color (gold in the present embodiment). The transmitted light b is absorbed by the magnetic recording layer 17. Therefore, when the counterfeit discrimination medium 10 is viewed from the α direction, it looks glossy and gold, but when viewed from another direction,
Since it becomes dull and makes it difficult to see the determination information layer 16 provided on the surface, forgery determination can be performed accurately. Although the light separating / reflecting layer 13 is provided on the magnetic recording layer 17, its thickness is thin, so that the magnetic recording layer 17 can be magnetically recorded.

The printing layer 18 is formed on the back surface of the substrate 11. Since the substrate 11 is a white substrate, the printed layer 1
8 can use colorful colors.

According to the present embodiment, depending on the viewing angle,
Since the judgment information 16a of the judgment information layer 16 becomes difficult to see,
Forgery discrimination can be performed reliably. In addition, even when a copy is made by a color copier, the determination information 16a is adapted to the background color and becomes difficult to see, so that it is possible to easily determine that the product is a copy. Furthermore, since the base material 11 is a white base material, the printed layer 18 can use colorful colors.

(Third Embodiment) FIG. 4 is a sectional view showing a third embodiment of a forgery discrimination medium according to the present invention, and FIG. 5 is a view showing a light separating / reflecting layer. The counterfeit discrimination medium 10 includes the base material 1
1, a colored layer 12 colored in a light-reflective color, a light separating / reflecting layer 13, an image receiving layer 14, a ground tint layer 15, and a determination information layer 16 of substantially the same color as the light reflected by the colored layer 12. , A magnetic recording layer 17, a printing layer 18, and a protective layer 19. The coloring layer 12 is a layer colored with a color capable of reflecting light transmitted through the light separation / reflection layer 13, and is formed on the base material 11. The determination information layer 16 is a layer that displays the determination information 16a that is substantially the same color as the light transmitted through the light separation / reflection layer 13 and reflected by the coloring layer 12, and that is difficult to determine due to the reflected light. Are formed on the light separating / reflecting layer 13.

As shown in FIG. 5, of the incident light, the light a reflected by the pearl pigment 13a is emitted in a direction of an angle α and the light b transmitted through the pearl pigment 13a.
Is reflected on the surface of the colored layer 12 and emitted in another angle β direction. Therefore, when the forgery discrimination medium 10 is viewed from the α direction, it looks like the color of the reflected light of the pearl pigment 13a, and when viewed from the β direction, it looks like the color of the reflected light of the colored layer 12.

According to the present embodiment, as described above, since the judgment information layer 16 has substantially the same color as the light transmitted through the light separating / reflecting layer 13 and reflected by the colored layer 12, the judgment information 16a
However, since it becomes difficult to see the reflected light, it is possible to accurately perform forgery discrimination. In addition, even when a copy is made by a color copier, the determination information 16a is adapted to the background color and becomes difficult to see, so that it is possible to easily determine that the product is a copy. Furthermore, the determination information layer 16 can be colored in various colors, and can use colorful colors.

(Modifications) Various modifications and changes are possible without being limited to the above-described embodiments, and they are also within the equivalent scope of the present invention. For example, FIG.
(A) As shown in (B), the image receiving layer 14 may not be provided. In this way, the number of manufacturing steps can be reduced, and the manufacturing cost can be reduced.

[0033]

As described in detail above, according to the first aspect of the present invention, since the judgment information layer is provided which displays judgment information which becomes difficult to judge when it is seen from a predetermined direction because the color is adapted to the color of the colored layer. Forgery discrimination can be easily performed.

According to the second aspect of the present invention, since the colored layer is dark and the judgment information layer is almost the same dark color, the judgment information layer is adapted to the dull background depending on the viewing angle. Since it becomes difficult to see, it is easy to recognize that it is a counterfeit product.

According to the third aspect of the present invention, since the coloring layer is formed of a black magnetic recording layer, it can be magnetically recorded and the printing layer can be colored colorfully.

According to the fourth aspect of the present invention, it is possible to judge the display information which is substantially the same color as the light transmitted through the light separating / reflecting layer and reflected by the colored layer, and which is adapted to the reflected light and becomes difficult to determine. Since the information layer is provided, forgery discrimination can be easily performed. Further, the judgment information layer can be made various colors.

According to the fifth aspect of the present invention, since the colored layer displays the tint block, the color of only the tint block portion changes according to the viewing angle, so that the forgery discrimination can be easily performed with excellent design. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a forgery discrimination medium according to the present invention.

FIG. 2 is a view showing a light separating / reflecting layer of the first embodiment of the forgery discrimination medium according to the present invention.

FIG. 3 is a sectional view showing a second embodiment of a forgery discrimination medium according to the present invention.

FIG. 4 is a sectional view showing a third embodiment of a forgery discrimination medium according to the present invention.

FIG. 5 is a diagram showing a light separating / reflecting layer of a third embodiment of the forgery discrimination medium according to the present invention.

FIG. 6 is a sectional view showing another embodiment of the forgery discrimination medium according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Counterfeit discrimination medium 11 Base material 12 Color layer 13 Light separation / reflection layer 13a Pearl pigment 13b Transparent medium 14 Image receiving layer 15 Ground pattern layer 16 Judgment information layer 16a Judgment information 17 Magnetic recording layer 18 Printing layer 19 Protection layer

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Yoshiki Sasaki, Inventor 1-1-1, Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. No. 1 Dai Nippon Printing Co., Ltd. F term (reference) 2C005 HA04 HA17 HB13 JB19 KA49 KA53 KA57 2H113 AA06 BA03 BA05 BA09 BB02 BB08 BB22 BC09 BC11 CA37 CA39 CA40 DA07 DA47 DA49 DA50 DA53 DA57 DA58 DA62 FA09 FA10 FA35 FA43

Claims (5)

[Claims] 1. A base material, a colored layer formed on the base material and colored so as to absorb light, and formed on the colored layer and reflecting light of a specific color among incident light, A light separation / reflection layer that transmits the light of the complementary color; and a light separation / reflection layer formed on the light separation / reflection layer and having substantially the same color as the colored layer. And a determination information layer for displaying determination information. 2. The forgery discrimination medium according to claim 1, wherein the coloring layer has a dark color, and the judgment information layer has substantially the same dark color. 3. The forgery discrimination medium according to claim 1, wherein the colored layer is formed of a black magnetic recording layer. 4. A base material, a colored layer formed on the base material and colored to reflect light, and formed on the colored layer to reflect light of a specific color among incident light, A light separation / reflection layer that transmits the light of the complementary color, and formed on the light separation / reflection layer, has substantially the same color as the light that passes through the light separation / reflection layer and is reflected by the colored layer. A counterfeit discrimination medium including a judgment information layer that displays judgment information that is difficult to discriminate. 5. The method according to claim 1, wherein:
The counterfeit discrimination medium according to claim 1, wherein the colored layer displays a tint block.