JP2720160B2 - Photo card - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a photographic card, that is, a card in which an image forming surface is provided on one surface of a support. The photo card of the present invention can be used as various types of cards that form an image on one side and can be used, for example, an identification card such as an employee ID card, a passport, a credit card, a driver's license, or a traffic permit. , A license or a license (hereinafter collectively referred to as an authentication identification card).

[Background of the Invention]

2. Description of the Related Art An authentication and identification card that has been generally used in the related art is configured by displaying the contents of certification, a prover's mark, a pattern, a symbol, and the like on a surface of the card with printing ink, paint, dye, or the like. Therefore, such an identification card is imitated with a color copier, a color film or the like which has been particularly developed in recent years, and the risk of unauthorized use is increasing.

For this reason, conventionally, forgery, alteration,
In order to prevent tampering, a photo of the face is put on the card, or the photo is combined with the certificate (JP-A-49-123016), or the card with the certificate is described in a waterproof plastic sheet. Attempts such as laminating with have been made. However, only by such a method, it is difficult to distinguish an imitation product imitated by a color copying machine, a color film or the like from a genuine product, and it is insufficient to prevent fraud.

Therefore, in order to prevent such forgery and falsification, use a magnetic tape or IC chip in which information is stored, or use moire on the surface image, that is, form an image with halftone dots, and superimpose a halftone dot on the halftone dot pitch. However, these methods require a large-scale device, are difficult to confirm, and have a problem in terms of simple practicality.

Among them, the authentication identification card with a built-in pattern disclosed in Japanese Patent Publication No. 58-45360 is easy to confirm and is effective for preventing forgery and falsification.

However, the authentication identification card described in Japanese Patent Publication No. 58-45360 is preferable in that the pattern is viewed from the back, but the pattern is built into the card and the pattern is viewed through the card. However, it is not always preferable to use it in the mode of “viewing”.
For example, it is not always practical when only a person concerned knows that a pattern is built in and tries to judge the authenticity based on this. In the density range of the card disclosed in the above publication, the detection of the watermark pattern is insufficient. On the other hand, if the density of the pattern is increased to enhance the effect of visual recognition by transmission, the pattern can be observed well from the back side. Instead, it feels like it is even printed on the back side, and the effect of the built-in pattern diminishes. Further, if an attempt is made to form a built-in pattern within the range described in the above-mentioned publication, a considerably strict standard is required for the concentration, and there is a problem in the production yield.

[Object of the invention]

The present invention solves the above-described problems of the prior art, and cannot be easily tampered with, such as forgery or falsification, is easy to manufacture, and can reliably determine authenticity by simple means. In order to provide a photo card that can be used.

[Structure and operation of the invention]

An object of the present invention is to provide a support comprising at least two layers of synthetic resin sheets, providing an image forming layer on one surface of the support, and providing a writing layer on the other surface of the support. The support has a transmission density in the range of 1.8 to 5.0, and a pattern is formed between any one of the at least two layers of the synthetic resin sheets constituting the support, and the transmission density of the pattern is 0.3. This was achieved by a photographic card having a transmission density of 0.9 or more on both sides of the support sandwiching the pattern.

That is, according to the present invention, with the above-described configuration, particularly in the above-mentioned concentration range, for example, the built-in pattern cannot be sensed at all in normal use, but can be sensed from the opposite side by strong light from one side. Can be.
According to the above configuration, it is possible to easily obtain, at low cost, a photo card in which the built-in pattern is not detected at all on the reflected light, but the pattern is detected by applying strong transmitted light from one side. Can be. In this way, it is easy to detect improper use, especially if only the related person knows about the built-in pattern using an ID card or the like.

Further, in the above support concentration range, the permissible range of the transmission density of the pattern is widened, the variation of the built-in pattern printing on the film, especially the density unevenness in a thick film does not cause a problem, and the production yield is improved. It is advantageous in terms of productivity, quality and cost.

 Hereinafter, the present invention will be described in more detail.

The photo card of the present invention comprises an image forming layer provided on one surface of a support. The image forming layer can be constituted as any photographic image forming layer, for example, a photosensitive image forming layer comprising a silver halide emulsion or the like. It is also a preferred embodiment to directly form a positive silver halide photographic layer. In addition, it can be formed as a material that forms an image by transferring a diffusion transfer type dye (for example, an image receiving layer of a photothermographic material), and may be various heat transfer type image forming layers.

Such an image forming layer may be formed on the entire surface of one side of the photo card, or may be formed partially, and can be appropriately set as needed. For example, it can be configured such that a face photograph or the like is printed on a part of one side of the card. A color photograph or a black-and-white photograph is optional.

The photo card of the present invention has a support made of at least two layers of a synthetic resin sheet. The synthetic resin sheets of at least two layers can be joined to each other by means such as adhesion, but as a result, processing such as cutting can be facilitated as compared with the case of a single-layer sheet. Further, since the configuration is made up of at least two layers of sheets, a built-in pattern can be easily provided by forming a pattern on any of the inner surfaces. The image forming layer is provided on one surface of such a support.

When a pattern is formed, at least two layers of the synthetic resin sheet have transmission densities on both sides of the pattern.
0.9 or more. The support sandwiching the pattern is preferably a white support, but may be colored in various other ways as required. In addition, the transmission density of the entire support composed of at least two layers of synthetic resin sheets is 1.
Between 8 and 5.0. Preferably it is in the range of 2.0 to 5.0.
More preferably, it is in the range of 2.0 to 4.0.

As a synthetic resin sheet for forming such a support, any synthetic resin having the above-described transmission density can be used. For example, as a synthetic resin material, polyethylene,
Polypropylene, polystyrene, polycarbonate,
Examples thereof include polymers such as polyethylene terephthalate and polyvinyl chloride, or mixtures thereof, and synthetic resins composed of copolymers obtained by using two or more monomers for obtaining these synthetic resins. The desired opacity can be obtained by whitening these synthetic resins, for example. For this purpose, any means can be used as appropriate, but for example, opacity is obtained by filling an opaque agent into a synthetic resin material used for a support or applying an opaque agent to a support. Can be.

Examples of the opacifying agent that can be used include crystalline or amorphous silica, titanium oxide, magnesium oxide, zinc oxide, alumina magnesium silicate, barium sulfate, zinc sulfate, talc, clay, and diatomaceous earth.

By using an appropriate amount of the opacifying agent, the above-mentioned transmission density can be obtained. Accordingly, the amount of the opacifying agent used is determined according to the desired transmission density. Generally, the amount is preferably about 3 to 20% by weight when filled in a synthetic resin material, and when coated on a support, 1g / m ² or more,
More preferably, it is 3 g / m ² or more.

When coloring is desired, an appropriate pigment or the like can be mixed.

When the above-mentioned polymer (including a copolymer) is used as a support, a plate-like film can be obtained by kneading and extruding the above-mentioned opacifying agent in the polymer, and reducing the film to a desired size. By cutting, a sheet constituting the support is obtained. The opaque layer may be provided by extruding the polymer into a flat plate and then applying an opaque agent or laminating an opaque film. Further, an opaque agent can be kneaded in the polymer, extruded and stretched to form voids (voids), thereby increasing the opacity.

In the photo card of the present invention, a pattern is formed between any of the sheets constituting the support. If the support consists of two layers of sheets, a pattern is formed between the two sheets,
In the case of three or more sheets, a pattern is formed at any appropriate position on the boundary between two or more sheets.

In the present specification, a pattern is used to mean characters, symbols, and patterns formed between synthetic resin sheets. Printing and imprinting are generally used as a method of forming a pattern in the present invention, but are not limited thereto. Since commercially available inks and pigments can be used, they may be selected according to the purpose. However, the density after forming a pattern is in the range of 0.3 to 2.0 in transmission density. It is desirable that the reflection density is 0.15 to 0.8. The optimum concentration depends on the intended purpose.

Also, the support component parts on both sides sandwiching such a pattern, that is, the support component part on one side divided by the pattern,
The support component on the other side (therefore, both may be composed of one layer of sheet, but may be composed of two or more layers of sheet, and may have an adhesive substance or the like other than the sheet. The body constituent parts refer to the whole of the constituent parts on one side), and the transmission density thereof is 0.9 or more. Preferably, it is in the range of 0.9 to 2.0.

In this specification, the transmission density is defined as follows. That is, it is a transmission density measured by a light transmission densitometer, provided that the measurement is performed through a Wratten No. 106 filter (see JIS-B-9560).

Further, in the photo card of the present invention, a writing layer is formed on the surface of the support opposite to the image forming surface.

When the photo card of the present invention is used as, for example, an ID card, the writing layer is configured so that bibliographic items can be described by, for example, character printing, or the photo card of the present invention is used for, for example, mail. When used as a postcard, it is configured to be able to write characters such as pressing a stamp or writing with a pen or the like, or to draw a picture.

Therefore, it is preferable that the writing layer does not repel and does not bleed when printing, so that the printing layer has a good riding property and is quick-drying. In addition, it is preferable that the ink has good writeability when drawing characters and pictures and that the stamp ink is well applied. In this case, it is preferable that the ink dries quickly, does not smear, and does not fall off due to friction or the like.

As a means for forming such a writing layer, for example, there is a means for forming a layer mixed with an inorganic powdery substance. For example, a writing layer can be formed using porous silica and gelatin. At this time, a gelatin hardener can be appropriately used.

Alternatively, an inorganic fine powder such as calcium carbonate, talc, diatomaceous earth, titanium oxide, or barium sulfate is contained in a film of a thermoplastic resin (polyolefins such as polyethylene and various copolymers are optional), and this film is formed. Can be formed to form a writing layer.

〔Example〕

The embodiment of the present invention has been described above. Needless to say, the present invention is not limited to the embodiments described below.

Example 1 (Picture card (preparation of 1-A to C)) On a 125 μm thick white polyethylene terephthalate film having a transmission density of 0.65, patterns having transmission densities of 0.30, 0.50, and 0.70, respectively, were printed. A gelatin solution containing colloidal silica was applied to the side surface to form a writing layer, whereby the white polyethylene terephthalate film had a transmission density of 0.
68.

Next, a molten polyethylene containing 8% of titanium oxide was extruded, and this was coated with the above-mentioned printing surface and a transmission density of 1.
It was laminated so as to be located between 35 and a 175 μ thick white polyethylene terephthalate film. This allows
The transmission density of the whole support in the part where the pattern is not printed is
It was 2.13. Then, the latter method (permeation density 1.
A photographic emulsion was applied to the surface of a (35) polyethylene terephthalate film.

Aging this sample (4 hours at a temperature of 40 ° C and a humidity of 60% RH).
Day), then punch out the following photo card 1-A, 1-B, 1-C
I got

Photo card 1-A As shown schematically in FIG. 1, a white polyethynylene terephthalate sheet 11 having a transmission density of 0.65 and a pattern 2 having a transmission density of 0.30, and a white polyethylene 12
And a white polyethylene terephthalate film 13 having a transmission density of 1.35, and a photographic emulsion layer forming an image forming layer 3 via an undercoat layer 5 on the surface of the polyethylene terephthalate film 13 of the support 1 The backing layer is formed on the surface of the sheet 11 and this surface is
What is.

Photo card 1-B: Same as photo card 1-A, except that the transmission density of the pattern is 0.50, as schematically shown in FIG.

Photo card 1-C: Same as photo card 1-A, except that the transmission density of the pattern is 0.70, as schematically shown in FIG.

(Preparation of photo cards 2-A to 2-C) A pattern with a transmission density of 0.30, 0.50, and 0.70 was printed on a 125 µ white polyethylene terephthalate film with a transmission density of 0.90, and colloidal silica was coated on the surface opposite to the printed surface. Containing gelatin solution was applied. As a result, the transmission density of the portion of the white polyethylene terephthalate film where no pattern was printed was 0.93.

Next, a molten polyethylene containing 8% of titanium oxide was extruded, and this was coated with the above-mentioned printing surface and a transmission density of 1.
It was laminated so as to be located between 35 and 175μ white polyethylene terephthalate film. As a result, the transmission density of the entire support at the portion where the pattern was not printed was 2.38. The latter (permeation density of 1.35) is then
A photographic emulsion was coated on the surface of the polyethylene terephthalate film.

Aging this sample (4 hours at a temperature of 40 ° C and a humidity of 60% RH).
), And punched out to obtain the following photo cards 2-A to 2-C.

Photo card 2-A: As schematically shown in FIG. 4, a white polyethylene terephthalate sheet 11 having a transmission density of 0.90 and a pattern 2 having a transmission density of 0.30 and a white polyethylene 12,
A support 1 comprising a white polyethylene terephthalate film 13 having a transmission density of 1.35, and a photographic emulsion layer forming an image forming layer 3 is formed on the surface of the polyethylene terephthalate film 13 of the support 1 via an undercoat layer 5. , Sheet 11
The backing layer is formed on the surface of the substrate, and this surface is the writing layer 4.

Photo card 2-B: Same as photo card 2-A, except that the transmission density of the pattern is 0.50, as schematically shown in FIG.

Photo card 2-C... Same as photo card 2-A, except that the transmission density of the pattern is 0.70, as schematically shown in FIG.

Example 2 The photographic cards of 1-A to -C and 2-A to -C obtained in Example 1 were subjected to exposure and development processing and UV-curable resin using an apparatus described in JP-A-61-80135. I made a coat and created a photo ID card.

Whether the built-in pattern can be detected by reflected light, or the built-in pattern can be detected by transmitted light (specifically, projection from one side with a flashlight and observation from the other side) of the photo ID card thus completed. Was observed.

 Table 1 shows the obtained results.

In observation by reflected light, those that could not be detected from the back surface were marked with ○, and those where the pattern could be detected were marked with x. Also,
In the observation with transmitted light, a sample that could be detected was rated as ○, and one that could not be detected was rated as ×.

As is clear from the results in Table 1, in the case of the 1-A, 1-B, and 1-C cards in which the density of the sheet on the back side is low, the pattern detection by reflected light from the back side is performed by the density of the built-in pattern. Can or cannot. In addition, the result of the present invention is slightly different from the point that the object of the present invention is that detection by reflected light cannot be performed and detection can be performed only by transmitted light, that is, only by squash.

On the other hand, in the 2-A, 2-B and 2-C cards according to the present invention, the pattern cannot be detected by reflected light, but can be detected only by transmitted light. The transmission density of the pattern is 0.50 to 0.5.
Even if it is shifted to 70, there is no particular problem in characteristics, and it can be seen that the allowable range of the printing density has been widened. Therefore, according to the photo card to which the present invention is applied, the prevention of forgery or falsification due to the sashimi pattern, which is the purpose of the ID card, can be sufficiently utilized.

Example 3 A writing layer containing clay was provided on one side of 80 μm of polypropylene-based synthetic paper YUPO (made by Oji Yuka Synthetic Paper) containing voids to further improve brushability and printability. Next, melted polyethylene containing 8% titanium oxide was extruded, and the permeation density was 1.
At 35, it was laminated with a 175μ white polyethylene terephthalate film. As a result, the transmission density of the portion where the pattern was not printed was 1.85. On the surface opposite to the surface where the white polyethylene terephthalate film was bonded, the transmission print density was 0.10, 0.20, 0.30, 0.40, 0.60, 0.80, 1.00,
The pattern changed to 1.15,2.00,2.50 is printed. Further on this, a transmission density of 1.35 and a 175μ
Of white polyethylene terephthalate film between 8
% Of titanium oxide was extruded and laminated. As a result, the transmission density of the entire support at the portion where the pattern was not printed was 3.30. Next, a photographic emulsion was applied by a conventional method. Aging this sample (temperature 40 ℃, humidity
After punching out at 60% RH for 4 days, an ID photo card was created.

This card is shown schematically in FIG. The reference numerals are the same as those in the above embodiments, but reference numeral 14 indicates a polypropylene-based synthetic paper. These photo cards were exposed according to Example 3,
After development processing and UV curing / resin coating, the built-in printing was observed for transmitted light and reflected light.

As a result, good results were obtained in a squash pattern having a transmission density of 0.30 or more and 2.00 or less.

〔The invention's effect〕

As described above, according to the present invention, it is possible to provide a photographic card that cannot be easily tampered with, such as forgery or falsification, is easy to manufacture, and that can be reliably authenticated by simple means.

[Brief description of the drawings]

1 to 7 are schematic cross-sectional views of a photo card according to an example or a comparative example of the present invention. 11, 13, 14 ... Synthetic resin sheet, 2 ... Pattern, 3 ... Image forming surface, 4 ... Writing layer

Claims (1)

(57) [Claims] An image forming layer is provided on one surface of the support, and a writing layer is provided on the other surface of the support. The transmission density of the support is in the range of 1.8 to 5.0, and a pattern is formed between any one of the at least two layers of synthetic resin sheets constituting the support, and the transmission density of the pattern is 0.3 or more and 2 or more. A photographic card comprising: a support member on both sides of the pattern having a transmission density of 0.9 or more;