JP2002283777A - Individual certification medium and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an individual certification medium having excellent forgery preventing properties, with which authenticity can be easily determined. SOLUTION: The individual certification medium has a base material, an image layer provided on the base material, an ultraviolet ray absorbing layer formed on the image layer, and a tally impression pattern provided between the image layer and the base material or between the image layer and the ultraviolet ray absorbing layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a personal authentication medium on which a special image for preventing forgery and falsification and authenticity determination is formed, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Hitherto, a system has been put into practical use for creating a face image certificate, such as an employee card or a membership card, for the purpose of certifying the owner by applying a dye thermal diffusion recording method. ing. It is necessary to prevent unauthorized use of these certificates, and it is required to provide such certificates that are difficult to forge and falsify and that can be easily authenticated.

[0003] As a known technique that can respond to these demands, there is the addition of a hologram, a seal, or the like to the surface of a certificate that is put to practical use in cash cards and the like. However, in the case of a certificate that requires a personal image, personal character information, or the like, when a hologram, a seal, or the like is applied, there is an inconvenience that the design of a document is limited by the area of the hologram and the seal. In addition, holograms and seals have the disadvantage that counterfeiting is relatively easy.

[0004] As described above, the conventional unauthorized use prevention measures are that the authenticity determination is easy, the forgery and falsification are difficult, and that no special area is required for providing the unauthorized use prevention measures. No one met all the conditions at the same time.

[0005]

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above circumstances, and has excellent anti-forgery and forgery performance.
It is an object of the present invention to provide a personal authentication medium that can be easily authenticated.

It is another object of the present invention to provide a method for easily manufacturing a personal authentication medium which is excellent in forgery / falsification prevention performance and is easy to determine authenticity.

[0007]

According to the present invention, there is provided a personal authentication medium comprising a base material, an image layer provided on the base material, and a fluorescent light formed from a part of the periphery of the image layer to the base material. A marking pattern containing a material; and an ultraviolet absorbing layer formed from the image layer to a part of the marking pattern.

[0008] Another personal authentication medium of the present invention is a base material, a marking pattern containing a fluorescent material provided on the base material, and an image formed from the base material to a part of the marking pattern. And an ultraviolet absorbing layer formed from a region excluding at least a part of the dividing pattern to the image layer.

In the method for producing a personal authentication medium according to the present invention, an image layer is formed on a base material, and a mark is formed using an ink containing a fluorescent material from the base material to a part of the periphery of the image layer. Forming a pattern, and forming an ultraviolet absorbing layer on a part of the dividing pattern and the image layer.

[0010] Another method of the personal authentication medium of the present invention is a method of forming an indicia pattern using an ink containing a fluorescent material on a substrate, and forming an image layer on the substrate and a part of the indicia pattern. And a step of forming an ultraviolet absorbing layer from the image layer to a part of the dividing pattern.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The personal authentication medium of the present invention comprises a base material, an image layer provided on the base material, an ultraviolet absorbing layer formed on the image layer, and an image layer and base material. And a marking pattern provided between the image layer and the ultraviolet absorbing layer. This dividing pattern contains a fluorescent material, a part of which is located on the periphery of the region where the image layer is formed,
The other parts are located outside. Thereby, the dividing pattern is arranged so as to include the area where the image is formed and the area where the image is not formed. Furthermore, since the ultraviolet absorbing layer is formed so as not to include at least a part of the marking pattern of the area where no image is formed,
At least a part of the dividing pattern extends outside the region where the ultraviolet absorbing layer is formed.

If the personal authentication medium has been tampered with, the marking may be damaged, and the tampering can be easily detected by checking the marking pattern.
Further, even if the breakage of the indicia cannot be visually recognized, the authenticity can be determined by irradiating ultraviolet rays. When this personal authentication medium is irradiated with ultraviolet light,
A part of the dividing pattern is shielded by the ultraviolet absorbing layer and does not emit light partially. At this time, the dividing pattern located below the ultraviolet absorbing layer does not emit light, and the dividing pattern extending outside the ultraviolet absorbing layer emits light. According to the present invention, more accurate authenticity can be easily determined by providing a marking pattern in which the whole can be visually recognized under visible light irradiation and only a part thereof can be visually recognized under ultraviolet light irradiation.

The ultraviolet absorbing layer used in the present invention is provided, for example, to prevent deterioration of an image layer or the like due to ultraviolet rays and to characterize light emission of a dividing pattern.

The method of manufacturing a personal authentication medium according to the present invention is divided into the following two types according to the arrangement of the dividing pattern.

In the case of forming an index pattern between the image layer and the substrate, a step of forming the index pattern by using an ink containing a fluorescent material on the substrate, a step of forming the index pattern on the substrate and a part of the index pattern A step of forming an image layer thereon, and a step of forming an ultraviolet absorbing layer over a region excluding at least a part of the marking pattern from the image layer.

When forming an index pattern between the image layer and the ultraviolet absorbing layer, the image layer is formed on the base material, and the fluorescent material is applied from the base material to a part of the periphery of the image layer. A personal authentication medium can be obtained by forming an indicia pattern using an ink containing, and then forming an ultraviolet absorbing layer on the region excluding at least a part of the indicia pattern and on the image layer.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of an ID card showing an example of a personal authentication medium according to the present invention.

As shown in the figure, this ID card 10
A substrate 1 having a dye-receiving layer formed on one surface thereof, an indicia 3 printed on the dye-receiving layer, and an image layer 4 formed so that a part of the indicia 3 and a part of its periphery overlap. A transparent ultraviolet absorbing layer 5 covering the image layer 4,
A character information layer 6 further provided on the dye-receiving layer and describing the identity, qualifications, etc., and a protective layer 8 made of an ultraviolet-curable resin covering the substrate 1 on which these layers are formed.
It is composed of Here, the ultraviolet absorbing layer 5 is also formed so as not to cover all other portions of the dividing mark 3.

FIG. 2 shows a sectional view of FIG. As shown in the figure, the ID card 10 has a configuration in which a dye receiving layer 2, an index 3, an image layer 4, an ultraviolet absorbing layer 5, a character information layer 6, and a protective layer 8 are laminated on a base material 1. .

FIG. 3 shows another example of the ID card. As shown in the figure, the ID card 20 has a configuration in which a dye receiving layer 2, an image layer 4, an index 3, an ultraviolet absorbing layer 5, a character information layer 6, and a protective layer 8 are laminated on a base material 1. . The dividing mark 3 is formed so that a part thereof overlaps a part of the peripheral part of the image layer 4, and the other part is formed on the dye receiving layer 2. Further, the ultraviolet absorbing layer 5 is formed so as not to cover all other portions of the indicia 3.

When the ID card shown in FIG. 1 to FIG. 3 is irradiated with ultraviolet rays, only the index 3 in an area not overlapping with the ultraviolet absorbing layer 5 and the image layer 4 emits light. Thereby, the authenticity of the ID card can be easily determined.

Further, in the present invention, as the ultraviolet absorber used for the ultraviolet absorbing layer 5, a material that preferably absorbs only ultraviolet light in a specific narrow wavelength range can be used. When the ultraviolet absorbing layer 5 using such a material is provided, the ultraviolet absorbing layer 5 can be irradiated with ultraviolet light of a specific wavelength range.
The mark 3 in a region not overlapping with the light emitting layer emits light, and the irradiation of ultraviolet rays in other wavelength regions also emits the mark 3 in a region overlapping with the ultraviolet absorbing layer 5. By utilizing this, it is possible to easily perform more accurate true / false determination.

The ID card 10 can be formed as follows.

FIG. 4 is a flowchart showing an example of the image forming process of the present invention.

As shown in FIG. 4, first, a base material 1 made of, for example, paper or resin is prepared, and a dye receiving layer 2 is formed on one main surface thereof.
To form Next, an indicia 3 is formed on the dye receiving layer 2 using an ink containing a fluorescent material that absorbs ultraviolet light and emits light. After that, the image layer 4 and the character layer 6 such as the status and qualifications are recorded by, for example, a thermal transfer method. At this time, the image layer 4 is formed so as to overlap a part of the dividing mark 3.

Further, as shown in FIG. 6, a transfer sheet in which an ultraviolet absorbent resin layer 13 containing an ultraviolet absorbent and a heat-sensitive adhesive layer 14 are laminated on a base film 11 via a release layer 12 is provided. prepare. The heat-sensitive adhesive layer 14 of this transfer sheet is brought into contact with the image layer 4 so that the ultraviolet-absorbing resin layer 1
The ultraviolet absorbing layer 5 can be formed by thermal transfer onto the image layer 4 together with 3. At this time, the ultraviolet absorbing layer 5 is formed so as to cover the entire image layer 4 and a part of the dividing mark 3. Further, in order to greatly improve the mechanical strength of the pattern, the image, and the character information, the protective layer 8 can be formed by applying and curing an ultraviolet curable resin 8 thereon.

FIG. 5 is a flowchart showing another example of the image forming process of the present invention.

After the step of recording the image layer 4 and the character layer 6 such as the identity and qualifications by the thermal transfer method, the ID card 20 forms the indicia 3 so that a part thereof overlaps the peripheral edge of the image layer 4. Otherwise, the method is the same as the method shown in FIG.

A fluorescent ink that absorbs ultraviolet light and emits light can be used to form the marking pattern. Such a fluorescent ink includes a resin component and a fluorescent material that absorbs ultraviolet light to emit light. Examples of the fluorescent material include organic pigment-based phosphors, inorganic pigment-based phosphors, and dye-based phosphors, such as SPE-A and ALN- manufactured by Nemoto Special Chemical Co., Ltd.
B, GOF-F, GYL, YO, YS-A, and GBF
-OR or the like can be used.

The ultraviolet absorbing layer can be formed using a transfer sheet as shown in FIG. In this transfer sheet, it is required that the ultraviolet-absorbing resin layer is easily peeled off by heating and is firmly bonded to the dye-receiving layer and the indicia. For this reason, in the transfer sheet of FIG. 6, the release layer 12 is provided on the base film 11 and the release layer 1
2, an ultraviolet absorbing resin layer 13 is provided, preferably a heat-sensitive adhesive layer 14 is provided. After the base film 11 is peeled off, the ultraviolet absorbing resin layer 13 and the heat-sensitive adhesive layer 14 are removed.
In order to prevent burrs and tails from remaining on the dye receiving layer, the adhesiveness between the base film 11 and the ultraviolet absorbing resin layer 13 is smaller than the adhesiveness between the heat-sensitive adhesive layer 14 and the dye receiving layer 2. It is desirable that the adjustment be slightly inferior. In this case, the release layer 12 may not be provided.

The ultraviolet absorbing resin layer contains a resin excellent in friction resistance, chemical resistance, solvent resistance, transparency and the like, and an ultraviolet absorbing agent.

Examples of the resin having excellent friction resistance, chemical resistance, solvent resistance, transparency and the like include polyester resins, polyurethane resins, acrylic resins, silicone resins and resins of these resins. A mixture or the like is used.

Examples of the polyester-based resin include, for example, Vylon 200 and Vylonal M manufactured by Toyobo Co., Ltd.
D1100, Vylonal MD1200, Vylonal MD1245, Vylonal MD1400, Vylonal GX-W27, Elitel UE-3 manufactured by Unitika Ltd.
350, Elitel UE-3380, and Elitel U
E-3200 or the like can be used.

As the polyurethane resin, for example, Nipporan 230 manufactured by Nippon Polyurethane Industry Co., Ltd.
1, Nipporan 2304, Nipporan 3016, Nipporan 3022, Nipporan 3027, Hard Rock WX-2000R, Hard Rock WX-2000S manufactured by Denki Kagaku Kogyo KK, and the like can be used. Further, these urethane resins may be used by mixing with an appropriate isocyanate compound.

Specific examples of the acrylic resin include products manufactured by Daicel Chemical Industries, Ltd. under the trade name of Sebian 45000,
Sebian 45610, Sebian 46777, Dianal BR-80, Dianal BR manufactured by Mitsubishi Rayon Co., Ltd.
-83, Diamond BR-85, and Diamond B
R-87 and the like can be used.

As the silicone resin, for example, Tosgard 510 manufactured by Toshiba Silicone Co., Ltd. can be used. Highly transparent fine particles such as silica, calcium carbonate, silicone fine particles, polymethyl methacrylate fine particles and the like, and wax can be added to these resins to prevent burrs and tailing during transfer. However, since these fine particles and wax deteriorate chemical resistance and solvent resistance, the average molecular weight is 20,000 to 8,000.
It is desirable to use 0 acrylic resin and not to add fine particles or to add a very small amount.

When an ultraviolet-curable resin layer is formed as a protective layer after the formation of the ultraviolet-absorbing layer, for example, depending on the type of the ultraviolet-curing resin, the adhesiveness to the ultraviolet-absorbing layer is not sufficient. The cured resin layer may peel off. In order to prevent this, a resin which is easily compatible with the ultraviolet-curable resin liquid in the resin used for the ultraviolet absorbing layer, for example, polyvinyl acetal resin manufactured by Sekisui Chemical Co., Ltd.
S-5, Eslek KX-1, Eslec KW-1, polyvinyl butyral resin Eslec BL-3, Eslec BL-S, and Eslec BX-L, Mitsubishi Chemical Corporation
A polyvinyl phenyl acetal resin such as PVPA can be mixed at an appropriate ratio. As a method for forming an ultraviolet absorbing layer using these resins, various methods such as gravure coating, reverse coating, die coating, wire bar coating, and the like, a method in which a mixed resin is formed into a paint, and applied and dried can be used. The thickness of the ultraviolet absorbing layer is
1 to 10 μm is preferred.

The heat-sensitive adhesive of the transfer sheet is required to have excellent adhesion to the dye receiving layer. Further, since the heat-sensitive adhesive comes in contact with a dye such as a disperse dye which forms characters, images and the like, it greatly affects light resistance and dark fading. Therefore, it is desirable that the heat-sensitive adhesive used here has excellent compatibility or reactivity with the resin of the dye-receiving layer and poor reactivity with such a disperse dye or the like. Examples of the heat-sensitive adhesive satisfying such conditions include polyester resin, cellulose resin, polyvinyl acetal resin, polyvinyl butyral resin, phenoxy resin,
Examples include a polypropylene resin, an acrylic resin, a mixture of these resins, and a copolymer. As the polyester-based resin, a resin used as a resin component of the above-described ultraviolet absorbing layer can be used.

As the cellulosic resin, for example, HPC-H, HPC-L, HPC manufactured by Nippon Soda Co., Ltd.
-SL and Hercules product name N-4, N-
7, N-10, N-14, K-14, and T-10 can be used.

As the polyvinyl acetal resin, for example, SLEKK KS- manufactured by Sekisui Chemical Co., Ltd.
1. Eslek KS-5 or the like can be used.

Examples of the polyvinyl butyral-based resin include, for example, SREC BL-, manufactured by Sekisui Chemical Co., Ltd.
1, Eslec BL-3, Eslec BL-S, Eslec BX-L, etc. can be used.

Examples of the phenoxy resin include PKHH, PKHJ, and PKHH manufactured by Union Carbide.
W-35, PKHW-35R, PXKS-6994, PXKS-7000 and the like can be used.

As the polypropylene resin, for example, Unistor R-10 manufactured by Mitsui Petrochemical Industry Co., Ltd.
0K, Unistal R-200K, Unistal R-2
00, Unistor R-300 and the like can be used.

As the acrylic resin, the resin used for the above-mentioned ultraviolet absorbing layer can be used. In addition,
Highly transparent fine particles such as silica, calcium carbonate, silicone fine particles, and polymethyl methacrylate fine particles, wax, and the like can be added to these resins to prevent burrs and tailing during transfer.

Further, when the heat-sensitive adhesive layer is applied on the ultraviolet absorbing resin layer during the production of the transfer sheet, in order not to destroy the ultraviolet absorbing resin layer, a resin dissolved in an alcohol solvent or It is preferable to use an aqueous emulsion resin. For example, when a polyvinyl acetal resin is used as the dye receiving layer, as a heat-sensitive adhesive,
Use of a polyvinyl butyral resin having a softening point of 75 to 90 ° C. is advantageous in adhesiveness, light resistance, light resistance, and dark fading.

Examples of the ultraviolet absorber added to the ultraviolet absorbing layer include organic materials such as benzophenone and benzotriazole, and inorganic oxide materials such as titanium oxide, cerium oxide, and tin oxide.

The ultraviolet lamp used for determining the authenticity of the personal authentication medium of the present invention is a lamp capable of emitting ultraviolet light of a specific wavelength, for example, a UV manufactured by Ultra Violet.
GL-15 and UVGL-25. These are 2
Either ultraviolet light having a wavelength of 54 nm or 365 nm can be irradiated.

In order to absorb ultraviolet light at only one of the wavelengths using this lamp, an ultraviolet absorber that absorbs a wavelength of 254 nm and transmits a wavelength of 365 nm, or transmits an ultraviolet light of a wavelength of 254 nm and 365 nm UV absorber that absorbs the above wavelength is required.

Examples of the ultraviolet absorber which absorbs a wavelength of 254 nm and transmits a wavelength of 365 nm include, for example, Biosorb 80 and Biosorb 1 manufactured by Kyodo Yakuhin Co., Ltd.
00, Biosorb 110, Biosorb 130, manufactured by Sumitomo Chemical Co., Ltd. Sumisorb 110, Sumisorb 400, AntigeneNBC, etc. can be used.

Examples of the ultraviolet absorber which transmits a wavelength of 254 nm and absorbs a wavelength of 365 nm include, for example, trade names Biosorb 550, Biosorb 580, Biosorb 582, Biosorb 583, Biosorb 590, Biosorb 591, manufactured by Kyodo Yakuhin Co., Ltd. Sumitomo Chemical Co., Ltd. brand name Sumisorb 300, Sumisorb 320 and the like.

The amount of the ultraviolet absorber to be added is not particularly limited, but is 2 to 66 parts by weight per 100 parts by weight of the resin component.
Preferably, it is added in a ratio of 10 to 40 parts by weight. If the amount is less than 2 parts by weight, the effect as an ultraviolet absorber is hardly obtained. If the amount is more than 66 parts by weight, problems such as coloring and cost increase tend to occur.

Examples of the method for forming the ultraviolet absorbing resin layer and the heat-sensitive adhesive layer include a method in which a mixed resin is formed into a coating material, such as gravure coating, reverse coating, die coating, and wire bar coating, and then applied and dried. .

As an example of an apparatus for producing the personal authentication medium of the present invention, for example, an indicia made of an ink that absorbs ultraviolet light and emits light by various printing methods is formed on a substrate having a dye image receiving layer. A means for providing a forming section and a non-image forming section in the vicinity thereof, a thermal transfer recording means for recording image and character information, a means for covering a part of an index pattern, an image and character information with an ultraviolet absorbing layer, and And a protective layer forming means.

EXPERIMENTAL EXAMPLE 1 A coating solution of a dye receiving layer having the following composition was applied to one side of a card-shaped 50 μm-thick white polyester film (Lumirror E20, manufactured by Toray Industries, Inc.), and the coating solution was applied at 120 ° C. for 30 minutes. After heating and drying, a dye receiving layer was formed.

Composition of Dye Receptive Layer Coating Solution Methyl Ethyl Ketone 30 parts by weight Toluene 30 parts by weight Polyester, urethane resin (trade name: UR-1400, manufactured by Toyobo Co., Ltd.) 30 parts by weight Amino-modified silicone oil (trade name, manufactured by Toshiba Silicone Co., Ltd.) : TSF4700) 0.2 part by weight Isocyanate (trade name: Coronate 2513, manufactured by Nippon Polyurethane Co., Ltd.) 1 part by weight Next, a part of the dye receiving layer was applied to a part of the dye receiving layer using a screen printing machine. The marking pattern was printed with an ink using the fluorescent pigment SPE-A. Thereafter, a character information layer and an image layer were formed by a sublimation type thermal transfer method such that a part thereof overlaps a part of the dividing pattern.

Next, a 6 μm-thick polyester film (trade name: Lumirror F531 manufactured by Toray Industries Inc.) having a heat-resistant lubricating layer formed on the back surface was prepared, and the surface thereof was coated with a gravure coater. The coating thickness after drying is 2-3μ
m, the following UV-absorbing resin paint was prepared, applied and dried to form a UV-absorbing resin layer.

UV-absorbing resin coating composition Acrylic resin (manufactured by Mitsubishi Rayon Co., Ltd., trade name: Dianal BR-83) 20 parts by weight UV-absorbing agent Biosoap 80 (250 to 280 nm)
4 parts by weight Methyl ethyl ketone 40 parts by weight Toluene 40 parts by weight Next, a coating for a heat-sensitive adhesive layer having the following composition was formed on the surface of the ultraviolet absorbing resin layer. Then, using a gravure coater, coating was performed so that the thickness of the coating film after drying was 0.1 to 0.5 μm, thereby preparing a thermal transfer sheet for forming an ultraviolet absorbing layer.

Paint composition for heat-sensitive adhesive layer 10 parts by weight of polyvinyl butyral resin (trade name: SREC BL-S manufactured by Sekisui Chemical Co., Ltd.) 90 parts by weight of ethanol The heat transfer sheet for forming an ultraviolet absorbing layer obtained as described above was A laminator LPD2306City manufactured by Fujipla Co., Ltd., which was applied on the substrate on which the character information layer and the image layer were formed, and was adjusted to a roller temperature of 150 degrees and a roller rotation speed of 1 m / min.
Then, thermal transfer was performed from the image layer to a part of the indicia to form an ultraviolet absorbing layer, and an ID card sample was obtained.

Next, the sample was irradiated with ultraviolet light using an ultraviolet lamp UVGL-25 manufactured by Ultra Violet Co., Ltd., and the appearance of the marking pattern was visually compared. FIG. 7 is a flowchart illustrating a method of determining the authenticity using the present invention.

Here, first, the target ID card is irradiated with ultraviolet light in a relatively low wavelength range of, for example, 254 nm using an ultraviolet lamp. Then, it is determined whether the indicia emits light only partially or entirely.

Next, in the case where only a part of the light is emitted, or in the case where all the light is emitted, ultraviolet light having a relatively high wavelength range of 365 nm is irradiated. Then, it is determined whether the indicia emits light only partially or entirely.

As a result, it is possible to judge that all of the light emitted by one of the light sources and light emitted partially by the other light are genuine, and that the other light is genuine.

As a result of the judgment, the marks of the obtained sample partially emitted light at 254 nm, and all emitted light at 365 nm. The results are shown in Table 1 below.
Shown in

Experimental Examples 2 to 6 Except that the following materials were used as UV absorbers,
An ID card was created in the same manner as in Experimental Example 1, and the authenticity was determined.

UV absorbent Experimental example 2 Biosorb 550 (manufactured by Kyodo Yakuhin Co., Ltd.)
(Absorbs light with a wavelength of 290 to 380 nm) Experimental Example 3 Sumisorb 130 (Sumitomo Chemical Co., Ltd.)
Example 4 Sumisorb 350 (Sumitomo Chemical Co., Ltd.) (absorbs light with a wavelength of 280 to 330 nm)
Experimental Example 5 Biosorb 520 (manufactured by Kyodo Yakuhin Co., Ltd.)
(Absorption of light having a wavelength of 240 to 380 nm) Experimental Example 6 None As a result, in Experimental Example 2, all the marks of the obtained samples emitted light at 254 nm and partially emitted at 365 nm.

Further, in Experimental Example 3, the obtained sample emitted light as a whole at both 254 nm and 365 nm.

Further, in Experimental Example 4, the obtained sample emitted light entirely at 254 nm and 365 nm.

In Experimental Example 5, the obtained sample showed partial light emission at both 254 nm and 365 nm.

Further, in Experimental Example 6, the marks of the obtained samples emitted light entirely at both 254 nm and 365 nm.

The 254 nm, 365 nm used in this experimental example
With ultraviolet light having a wavelength of nm, the authenticity of Experimental Examples 1, 2, and 5 can be determined. In Experimental Examples 3 and 4, by changing the wavelength of the ultraviolet light to about 254 nm or about 300 nm, it is considered that the authenticity can be determined.

However, in the experimental example 6, the authenticity cannot be determined more reliably by the irradiation of ultraviolet rays.

[0073]

[Table 1]

[0074]

According to the present invention, an image layer is formed on a marking pattern formed by using a fluorescent ink, and an ultraviolet absorbing layer is formed on the image layer. Can be visually recognized, and only a part of the dividing mark can be visually recognized under the irradiation of ultraviolet light, so that a personal authentication medium that is easy to determine the authenticity and difficult to forge or falsify can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a personal authentication medium of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a sectional view showing another example of the personal authentication medium of the present invention.

FIG. 4 is a flow chart illustrating an example of the method of the present invention.

FIG. 5 is a flowchart showing another example of the method of the present invention.

FIG. 6 is a cross-sectional view illustrating a configuration of a transfer sheet for forming an ultraviolet absorbing layer used in the present invention.

FIG. 7 is a flowchart for explaining the authenticity determination method used in the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base material, 2 ... Dye receiving layer, 3 ... Marking, 4 ... Image layer,
5 ... UV absorbing layer, 6 ... Character information layer, 8 ... Protective layer, 1
0, 20: ID card, 11: base film, 12: release layer, 13: ultraviolet absorbing resin layer, 14: heat-sensitive adhesive layer

Claims (4)

[Claims] 1. A base material, an image layer provided on the base material, an indicia pattern containing a fluorescent material formed from a part of the periphery of the image layer to the base material, A personal authentication medium comprising a part and an ultraviolet absorbing layer formed on the image layer. 2. A substrate, an indicia pattern containing a fluorescent material provided on the substrate, a part of the indicia pattern and an image layer formed on the substrate, and an image layer formed on the image layer. A personal authentication medium comprising an ultraviolet absorbing layer formed over a part of the dividing pattern. 3. A step of forming an image layer on a base material, a step of forming an indicia pattern from the base material to a part of a peripheral portion of the image layer using an ink containing a fluorescent material, and an image layer. A method for manufacturing a personal authentication medium, comprising a step of forming an ultraviolet absorbing layer over a part of the dividing pattern from above. 4. A step of forming an indicia pattern using an ink containing a fluorescent material on a substrate, a step of forming an image layer on the substrate and a part of the indicia pattern, and a step of forming an image layer on the substrate. Forming a UV-absorbing layer over a part of the dividing pattern.