JPH1058870A - Color change card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the forgery prevention effect, inexpensive and suitable for a small lot by containing an image treated layer formed of colored and transparent ink in a manner that a part of the image treated layer is overlapped on a color change printing layer. SOLUTION: A color change printing layer 13 is formed on the surface of a card base 11, and a part of the color change layer is overlapped on an ordinary printing layer 12, and an image is formed by using color change ink to be color changed by a first angle α and a second angle β. An image is formed on the color change printing layer 13 by using the color change ink in which a pigment 13a prepared by laminating a high refractive index layer and a low refractive index layer in a transparent medium 13a. A card having visual effect and forgery prevention effect and changing colors by the angles can be formed easily and inexpensively by the arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color-changing card whose hue changes depending on the angle of incidence of light. The present invention relates to a color change card preferably used for the present invention.

[0002]

2. Description of the Related Art As a conventional card, for example, a card in which a transparent hologram layer is transferred to the outermost surface thereof for the purpose of preventing forgery and differentiating other cards is known.

[0003]

However, the above-mentioned conventional card requires advanced technology and expensive materials to form a transparent hologram layer, and it is difficult to cope with a small lot design. There is a problem that the manufacturing cost of the card increases.

[0004] It is an object of the present invention to provide a color change card which can provide a visual effect with a colored and transparent image of an upper layer depending on a viewing angle, and which can obtain a forgery prevention effect at a low cost and in a small lot. .

[0005]

In order to solve the above-mentioned problems, the invention according to the first aspect is directed to a card base (11) having a reflective surface and a first or second card base on the surface of the card base.
A color-change printing layer (13) formed using a color-change ink that changes color depending on the direction of the image processing layer, and an image processing layer formed of a colored and transparent ink such that at least a part of the color-change printing layer overlaps the color-change printing layer. (15).

According to a second aspect of the present invention, there is provided the color changing card according to the first aspect, further comprising a normal printing layer (12) formed by using a normal ink on a surface of the card base material. Is formed so as to at least partially overlap the normal printing layer.

[0007] The third aspect of the present invention is the first or second aspect.
In the color change card according to the above, the color change ink,
A pigment in which a high refractive index layer and a low refractive index layer are laminated in a transparent medium is dispersed.

[0008] The invention of claim 4 is the first to third aspects of the present invention.
In the color changing card according to any one of the above, the image processing layer is formed by a sublimation transfer type printer.

[0009] The invention of claim 5 is the invention of claims 1 to 4.
3. The color changing card according to claim 1, wherein the image processing layer includes a photograph of a face of a card holder.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, an embodiment of the present invention will be described in more detail with reference to the drawings and the like. FIG.
1 is a sectional view showing an embodiment of a color change card according to the present invention. In this embodiment, the color change card 10 includes a card base material 11, a normal print layer 12, and a color change print layer 13.
, An intermediate protective layer 14, an image processing layer 15, a surface protective layer 16, and the like.

The card substrate 11 has a flat reflecting surface 11a, and serves as a carrier for the card.
For example, a resin sheet of a vinyl chloride resin, polyethylene terephthalate, polycarbonate, or the like, a metal sheet, a paper sheet, or the like can be used.

The normal printing layer 12 is a layer formed on the card base material 11 and using a normal ink to form images such as characters and figures. At this time, the normal print layer 12 preferably has a reflection density of less than 1.0 (using a Macbeth reflection densitometer RD918). In this embodiment,
0.8.

The color-change printing layer 13 is formed on the surface of the card substrate 11 and partially overlaps with the surface of the normal printing layer 12, and the color-change printing layer 13 changes color by the first angle α and the second angle β. This is a layer in which images of characters, figures, and the like are formed using a color changing ink. As the color-change ink, for example, a pigment obtained by laminating a layer of high refractive index silicon oxide, titanium oxide, iron oxide, or the like and a layer of low refractive index mica or the like in a transparent vehicle can be used.

The intermediate protective layer 14 is formed on the color-change printing layer 13 to protect the color-change ink layer 13, and is formed by laminating a transparent sheet of a vinyl chloride resin, polyethylene terephthalate, polycarbonate or the like. Or by applying OP ink or the like.

The image processing layer 15 is a layer formed so as to be at least partially overlapped with the color change printing layer 13 and formed of a colored and transparent ink. This image processing layer 15 can be formed by, for example, a sublimation transfer type card printer. Here, the sublimation transfer method is a method of using a sublimable dye, evaporating the dye by heat, and attaching or dyeing the evaporated dye to a transfer target (here, the intermediate protective layer 14). Say. When the protective intermediate layer 14 is a sheet, the image processing layer 15 may be printed on the sheet and then laminated.

The surface protective layer 16 is formed on the image processing layer 15 and is a transparent layer for protecting the image processing layer 15. A transparent resin sheet such as a vinyl chloride resin is heat-sealed or bonded. It can be formed by laminating with an agent or the like. In the case where the image processing layer 15 is formed by the sublimation transfer method, since the dye is used, there is a migration property to another synthetic resin (for example, a card case). It is preferable to provide a protective layer by transfer or coating.

FIG. 2 is a diagram showing a color-change printing layer of the color-change card according to the present embodiment. The color-change printing layer 13 has an image formed of a color-change ink in which a pigment 13a in which a high-refractive-index layer and a low-refractive-index layer are laminated in a transparent medium 13b is dispersed. As shown in FIG. 2A, the incident light is reflected by the pigment 13a, emitted in the first angle α direction, and transmitted through the pigment 13a with a high refractive index.
The light is reflected on the reflection surface 11a of the card base material 11 or the surface of the normal print layer 12 formed on the reflection surface 11a, and is emitted in the second angle β direction.

At this time, the relationship between the reflected light and the transmitted light of the pigment 13a is such that one of the wavelengths of visible light interferes depending on the thickness of the pigment 13a as shown in FIG.
The combination is as follows.

[0019]

Therefore, for example, when the color change printing layer 13 looks silver at the first angle α, it looks transparent at the second angle β.

FIG. 3 is a diagram for explaining the visual effect of the color changing card according to the present embodiment. In this embodiment, FIG.
As shown in (A), the letter “D” and the letter “DNP card” are printed as the normal printing layer 12, the copy-forgery-inhibited pattern is printed as the color-change printing layer 13, and the pigment shown in Table 1 is ink-printed. Then, a face photograph was printed by a card printer by a sublimation transfer method as an image processing layer 15.

As shown in FIG. 3B, when the color changing card 10 is viewed at the first angle α, the image processing layer 1
Along with 5, the color-change print layer 13 appears to glow in “blue”. Next, as shown in FIG. 3C, when viewed at the second angle β, the color-change printing layer 13 is “light yellow”,
Since it is almost transparent, only the upper image processing layer 15 can be clearly seen.

According to the present embodiment, the color-change print layer 13 is seen to be switched depending on the angle, interferes with the upper image processing layer 15, and produces a visual effect that cannot be expressed by each layer alone. be able to. Further, even if the appearance from a certain angle is copied by a color copier or the like, the effect of the image switching is not obtained, so that the card can be discriminated as a counterfeit card without using a special discriminating device.

Various modifications and changes are possible without being limited to the above-described embodiment, and these are also within the equivalent scope of the present invention. For example, the normal printing layer can be further printed partially on the color changing printing layer. The image of the image processing layer can form individual information, is suitable for single item or small lot production, and in addition to information for certification such as a face photograph, forms an image such as a pet or other favorite information. Or a company mark or a symbol mark. The image of the color-change printing layer is preferably formed in correspondence with the image of the image processing layer.
For example, a photograph of the face of the cardholder and a mark of the organization to which the cardholder belongs can be mentioned.

Since the color change printing layer is easily affected by the color of the base, it is desirable to appropriately select the color of the card substrate 11 or the normal printing layer 12. For example, when the background is white, the complementary color that is a transmission component is reflected back by the background again, and is absorbed by the component that is the original reflection color, thereby reducing the color effect. If the background is black, the transmitted complementary color component is absorbed by the background black, and only the original reflected light is recognized.

[0026]

As described in detail above, according to the present invention, since a color and transparent image processing layer is provided on the color change printing layer, the color can be changed by the first or second angle. Can be changed, and the same effect as that of the transparent hologram can be obtained. Therefore, a card having a visual effect and an anti-counterfeiting effect can be provided easily and at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a color change card according to the present invention.

FIG. 2 is a view showing a color-change printing layer of the color-change card according to the embodiment.

FIG. 3 is a diagram illustrating a visual effect of the color change card according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Color change card 11 Card base material 12 Normal print layer 13 Color change print layer 14 Intermediate protective layer 15 Image processing layer 16 Surface protective layer

[Procedure amendment]

[Submission date] September 3, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

Claims (5)

[Claims] A card substrate having a reflective surface; a color-change printing layer formed on a surface of the card substrate using a color-change ink that changes color in a first or second direction; A color change card comprising an image processing layer formed of a colored and transparent ink so that at least a part of the layer overlaps the layer. 2. The color changing card according to claim 1, further comprising a normal printing layer formed on a surface of the card base using a normal ink, wherein the color changing printing layer is at least one of the normal printing layers. A color changing card characterized in that a part thereof is formed so as to overlap. 3. The color-change card according to claim 1, wherein the color-change ink is obtained by dispersing a pigment in which a high refractive index layer and a low refractive index layer are laminated in a transparent medium. A color changing card characterized by the following. 4. The color changing card according to claim 1, wherein the image processing layer is formed by a sublimation transfer type printer. 5. The color changing card according to claim 1, wherein the image processing layer includes a photograph of a face of a card holder.