JP2000326666A - Card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a forgery preventive effect of a low cost by providing a color pattern layer using no bleeding ink and a color pattern layer using a bleeding ink on a transparent base plate, and displaying a color pattern color changing a monochromatic ink and a color pattern having no color change. SOLUTION: A color pattern 2 observed through a transparent protective base plate and its background color 3 are printed as one color pattern layer 11 on the transparent protective base plate 1. A bleeding ink is printed thereon as an another color pattern layer 4. Further, as another color pattern layer 12, a background color 5 observed without passing through the base plate and a color pattern 6 are printed thereon. Thereafter, a transparent vinyl chloride sheet 7 is superposed thereon, and hot pressed. The bleeding ink of the layer 4 is bled being made compatible with both the background colors of the layers 2, 6 by a heat and a pressure of a hot press. That is, a pigment 8 in the bleeding ink is moved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card effective for preventing forgery.

[0002]

2. Description of the Related Art Hitherto, as methods for preventing forgery of ID cards, credit cards, and the like, hologram seals are provided, signature panels are compared with signatures, facial photographs are provided, fine color patterns, and encryption information is incorporated into magnetic stripes. Has been commonly done. More recently, fingerprint matching,
Higher security methods that combine biometric information such as iris verification have been studied and are being used.

On the other hand, in the case of a card medium, for example, in order to prevent forgery of an optical card, a printed layer is provided on a protective substrate, a PVC sheet is laminated thereon and hot pressed, and a transparent substrate having an optical recording layer is hot-pressed. It can be manufactured by bonding with a melt adhesive.

In order to prevent forgery of a magnetic card, a magnetic card can be manufactured by providing a printed layer on a core sheet, overlaying a PVC sheet on the printed layer, and hot pressing.

[0005]

However, there is a problem that the usual forgery prevention method is costly. For this reason, there has been a demand for a card that has an effect of preventing forgery and that can be manufactured while maintaining the current cost.

The present invention has been made to solve such problems of the prior art, and has as its object to provide a card which has an effect of preventing forgery and is inexpensive. .

[0007]

That is, the present invention relates to a card having a plurality of color pattern layers on a transparent substrate, wherein the plurality of color pattern layers use a first color pattern layer using an ink which does not bleed itself. Having a second color pattern layer using an ink to bleed in contact with the first color pattern layer, the second color pattern layer by heating and pressing the second color pattern layer A card characterized in that at least one color pattern of a color pattern layer is displayed on a substrate by bleeding the ink of the color pattern layer, and displaying both the color tone of the color pattern in which at least one color of the color has changed and the color pattern having no color change.

In the present invention, it is preferable that a second color pattern layer is provided between two first color pattern layers in contact with each other. Also, the first color pattern layer,
It is preferable that the first color pattern and the background of the first color pattern are formed, and the ink of the second color pattern layer bleeds on the background of the first color pattern.
Further, it is preferable that the color of the bleed portion viewed from one surface of the transparent substrate of the card differs from the color of the bleed portion viewed from the other surface.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A card according to the present invention is a card having a plurality of color pattern layers on a transparent substrate, wherein the plurality of color pattern layers use an ink that does not bleed itself. In contact with the first color pattern layer, it has a second color pattern layer using ink to bleed, the second color pattern in the first color pattern layer by heating and pressurizing the color pattern layer The ink of the layer is bleed, and the color tone of both the color pattern in which at least one color of color has changed and the color pattern without color change are displayed on the substrate.

That is, the present invention provides a card having a color pattern on a transparent substrate, which has a first color pattern layer using ink that does not bleed, and a second color pattern layer using ink that does bleed. Then, the second color pattern layer is bleed on the first color pattern layer by heating / pressing after the pattern formation, and the color pattern changed by this is provided on the substrate.

[0011] The card thus obtained is characterized in that the color of one side of the transparent substrate provided with the color pattern is different from that of the bleed portion viewed from the other side.
As described above, according to the card of the present invention, it is possible to provide a color tone that cannot be produced by printing a normal color pattern. It has the same effect as, but halves the cost.

In the present invention, bleeding is a phenomenon that occurs because the pigment or dye in the ink is dissolved in a solvent, plasticizer, wax, oil, water, etc. contained in the ink and spreads around the ink. The effect on the other layers is that the color is slightly blurred.

[0013] To promote this bleeding, it is advisable to use a slow solvent to slow down the drying of the print. Inks generally contain media and dyes and pigments as main components, while bleeding is thought to be mainly affected by the heat resistance of the dyes and pigments in the second color pattern layer.

As the type of dye / pigment in the second color pattern layer, it is preferable to use yellow / red dye / pigment having particularly low heat resistance. The melting point of these dyes and pigments is 150
C. or lower is preferably used. As the dye / pigment, both water-soluble and oil-soluble dyes can be used.

Specific examples of yellow and red dyes and pigments include C.I. I. Acid yellow 17, 23, 42, C.I. I. Acid Red 1, 6, 13, 14, C.I. I. Food yellow 3, 4, C.I. I. Food Red 9, 14, C.I. I. Direct Yellow 1, 12, 24, C.I. I. Direct Red 1, 4, 9, 13, C.I. I. Basic Yellow 23, 24, 26, 2
8, C.I. I. Basic Red 27, 46, 49 or the like can be used.

Printing is preferred for forming the color pattern layer, and screen printing is particularly suitable.

Next, the specific structure of the card of the present invention will be described below by taking an optical card as an example. (1) Case of Incorporating Bleed Color Pattern on Both Sides of Card FIG. 1 is a cross-sectional view showing an example of the card of the present invention, and shows a cross-sectional view of a case where bleed is incorporated into a design as viewed from both sides of the card. is there.

FIG. 3 and FIG. 4 are plan views showing the card of FIG. 1 and show how the color pattern bleeds. FIG. 3A shows the first color pattern layer, FIG.
(B) is the second color pattern layer, and FIG.
FIG. 4D shows a state in which the second color pattern layer bleeds on the first color pattern layer, and FIG. 4E shows a state in which the second color pattern layer is present on the first 'color pattern layer. FIG. 4F shows the card of the present invention which has been made into an optical card when viewed from the optical recording layer side.

In FIG. 1, a first color pattern 2 as seen through the transparent protective substrate and a background color 3 of the first color pattern are printed as a first color pattern layer 11 on the transparent protective substrate 1.

In FIG. 1, the "first color pattern" and the "background of the first color pattern" are divided to clarify the position of the background, but the concept of the first color pattern layer is as follows. It includes both. The same applies to FIG.

FIG. 3A shows the first color pattern layer 11.
Is shown. Further, a bleed ink is printed thereon as a second color pattern layer 4. FIG. 3B shows the second color pattern layer. Next, a first 'color pattern 6 and a background color 5 of the first' color pattern viewed without passing through the transparent protective substrate are printed thereon as a first 'color pattern layer 12. FIG. 3C shows the first 'color pattern layer 12. A transparent PVC sheet 7 is placed on this and hot-pressed at 140 ° C.

By the heat and pressure of the hot press, the bleed ink of the second color pattern layer is compatible with the respective background colors of the first and first 'color pattern layers and bleeds. The arrow in FIG. 1 indicates the bleed direction, and indicates the movement of the dye 8 in the bleed ink. FIGS. 4D and 4E show a state in which bleeding is performed on the first color pattern layer 11 and the first 'color pattern layer 12, respectively. First, first '
Are designed to include a light color tone in consideration of bleed. Therefore, unlike the color tone produced by mixing inks, it is difficult to produce the same design by ordinary printing.

At this time, it is effective to change the background color of the first and first 'color patterns. That is, the colors of the printing ink bleed from the one second color pattern layer to the first and first 'color patterns are different colors due to the influence of the background color. For this reason, the place where two-color ink is normally used can be made one color, which can contribute to cost reduction.

A plurality of colors can be used for both the first color pattern and the second color pattern, and it is more effective if the second color pattern has a plurality of colors. In addition, it is effective to design the portion of the first color pattern corresponding to the outer periphery of the bleed with a dark color of the ink that does not bleed so that the bleed color cannot be recognized.

The resulting transparent protective substrate including the bleed color pattern was bonded to the transparent substrate provided with the optical recording layer via a hot melt adhesive to obtain an optical card 9. (FIG. 4F) At this time, the transmittance of the recording layer of the optical card is about 25%, so that the first color pattern bleeding through the optical recording layer can be seen.

Furthermore, not only optical cards but also magnetic cards,
The present invention is also effective for a card using a transparent substrate among contact IC cards, non-contact IC cards, rewritable cards, and the like. Further, the present invention can provide two colors without displacement by using the second color pattern layer,
The present invention can be used more effectively for a card that is not favorably misaligned on both sides.

(2) When Using Bleed on Only One Side of Card FIG. 2 is a cross-sectional view showing another example of the card of the present invention, showing a cross-sectional view when using bleed on only one side of the card. is there.

In FIG. 2, a first ′ color pattern 6 is applied on the transparent protective substrate 1. At this time, the printing ink may be the same as the ink used in the first color pattern 2, but so-called blank printing excluding the portion where the second color pattern layer 4 is applied. Use a dark color such as black or indigo. A bleed ink is printed as the second color pattern layer 4. Next, after applying the background color 3 of the first color pattern, the first color pattern 2 is completed. The transparent PVC sheet 7 is superimposed on the side on which the first color pattern 2 is provided, and hot-pressed at 140 to 150 ° C.

By the heat and pressure of the hot press, the bleed ink of the second color pattern layer 4 is compatible with the background color 3 of the first color pattern and bleeds. At this time, the first color pattern is designed in consideration of bleed, so a design containing a light color of bleed is formed, and the same design is provided by normal printing unlike the color tone produced by mixing ink. It is difficult to manufacture even if it tries.

In this example, printing information of two colors can be seen by printing the second color pattern layer of one color. That is, when viewed from the transparent PVC sheet, the color in which the second color pattern layer bleeds into the background color of the first color pattern,
When observed from the transparent protective substrate side, the color of the second color pattern layer itself is observed.

The color change of the first color pattern layer due to the bleed is represented by a color difference ΔE of 0.8 ≦ ΔE ≦ 35 (measuring device:
(A color difference meter CR-200, manufactured by Minolta Co., Ltd.) is preferable. At ΔE <0.8, almost no color difference is perceived, which is meaningless in the present invention. ΔE> 35 is not preferable because the color difference is too large and can be expressed by the toning of another ink.

[0032]

EXAMPLES The present invention will be specifically described below with reference to examples.

Example 1 A card shown in FIG. 1 was prepared. In the drawing, the printing configuration of the color pattern is reduced for simplification.

A first color pattern as seen through the protection substrate was printed on a 0.3 mm thick transparent polycarbonate protection substrate. Ink used: Screen printing ink EGS made by Teikoku Ink (color used: dark green, purple, black; light blue as background). Further, a bleed ink was printed thereon as a second color pattern layer. Ink used:
Screen printing ink EGS made by Teikoku Ink (colors used: yellow, orange, cream, yellow-green, pink). Next, a first 'color pattern to be viewed without passing through the protective substrate was printed thereon with the background color first. Ink used: Screen printing ink EGS made by Teikoku Ink (Used color: white as background color.
Blue, dark brown, black). A transparent PVC sheet made of Mitsubishi resin and having a thickness of 50 μm was placed thereon, and hot-pressed at 140 ° C.

Each of the colors of the second color pattern layer bleed into the respective background colors of the first and first 'color patterns. First color pattern side: The background color is light blue. The yellow, orange, cream, yellow-green, and pink colors of the second color pattern layer bleed, and the color of the second color pattern layer became lighter and mixed with light blue.

First 'color pattern side: The background color is white. The yellow, orange, cream, yellow-green, and pink colors of the second color pattern layer bleed, and the colors of the second color pattern layer were each faded.

The light blue of the background color of the first color pattern was a color difference ΔE = 5 between the yellow bleed portion and the non-bleed portion of the second color pattern layer. The white color of the background color of the first 'color pattern has a color difference ΔE = YE between the yellow bleed portion and the non-bleed portion of the second color pattern layer.
It was 12.

Example 2 A card shown in FIG. 2 was prepared. In the drawing, the printing configuration of the color pattern is reduced for simplification.

A first 'color pattern as seen through the protective substrate was printed on a 0.3 mm thick transparent polycarbonate protective substrate. Ink used: Screen printing ink EGS made by Teikoku Ink (color used: dark green, purple, black; mainly black printing). Further, a bleed ink was printed thereon as a second color pattern layer. Ink used: Screen printing ink EGS (color used: yellow, orange) manufactured by Teikoku Ink. Next, a first color pattern to be viewed without passing through the protective substrate was printed thereon with a background color first. Ink used: Screen printing ink E made by Teikoku Ink
GS (color used: white as the background color. In addition, blue, dark brown,
Black). A transparent PVC sheet made of Mitsubishi resin and having a thickness of 50 μm was placed thereon, and hot-pressed at 140 ° C.

Each of the colors of the second color pattern layer bleed into the background color of the first color pattern. First color pattern side: The background color is white. The yellow and orange colors of the second color pattern layer bleed, and the color of the second color pattern layer faded to a color mixed with white.

The first 'color pattern side did not bleed, and the original color of yellow and orange of the second color pattern layer was observed. The white color of the background color of the first color pattern was a color difference ΔE = 12 between the yellow bleed portion and the non-bleed portion of the second color pattern layer.

Example 3 An optical recording layer made of polymethine was provided on a transparent polycarbonate substrate having a thickness of 0.4 mm to a thickness of 1000 °.
The optical recording layer surface and the protective substrate side of the card having the bleed color pattern obtained in Example 1 were bonded inside with a 50 μm-thick ethylene-vinyl acetate pot-melt adhesive. Got a card.

Example 4 In the same manner as in Example 3, an optical card was manufactured using the card having the bleed color pattern obtained in Example 2.

[0044]

As described above, according to the card of the present invention, it is possible to provide a color tone that cannot be produced by printing a normal color pattern. This has the same effect as printing two colors, and the cost in that part is halved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a card of the present invention.

FIG. 2 is a sectional view showing another example of the card of the present invention.

FIG. 3 is a partial plan view showing the card of FIG. 1;

FIG. 4 is a partial plan view showing the card of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent protective substrate 2 First color pattern 3 First color pattern background color 4 Second color pattern layer 5 First 'color pattern background color 6 First' color pattern 7 Transparent PVC sheet 8 Dye / pigment 9 Optical card 10 Optical recording area

Claims (4)

[Claims] 1. A card having a plurality of color pattern layers on a transparent substrate, wherein the plurality of color pattern layers are formed of a first color pattern layer using an ink which does not bleed, and a first color pattern layer. In contact with, has a second color pattern layer using an ink to bleed, and bleed the ink of the second color pattern layer to the first color pattern layer by heating and pressing the color pattern layer, at least A card characterized in that the color tone of both a color pattern in which one color of ink changes color and a color pattern without color change is displayed on a substrate. 2. The card according to claim 1, wherein a second color pattern layer is provided between two first color pattern layers in contact with each other. 3. The first color pattern layer includes a first color pattern and a background of the first color pattern, and the ink of the second color pattern layer bleeds on the background of the first color pattern. The card according to claim 1 or 2, wherein: 4. The card according to claim 1, wherein a color of a bleed portion as viewed from one side of the transparent substrate of the card is different from a color of the bleed portion viewed from the other side.