JPH07246792A - Information carrier, authenticity determination method and authenticity determination device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an information carrier capable of sufficiently preventing forgery, alteration, etc., a method of authenticating the information carrier, and a device of authenticity determination. [Structure] This information carrying card 1 includes a card base 2 and
It is provided with a vermilion-colored information pattern 4 provided on the base body, and an auxiliary pattern 6 provided adjacent to the information pattern and composed of an ink which develops a vermilion color when heated colorless at normal temperature. Characterize. Since the auxiliary pattern 6 is colorless at room temperature, it is difficult to visually recognize this pattern with the naked eye, so that the card 1 having the information pattern and the auxiliary pattern can be prevented from being forged or altered. Further, since the auxiliary pattern 6 is visualized by heating, it is possible to visually judge whether the counterfeit card does not have the auxiliary pattern and the authentic card or the reading device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information carrier, its authenticity determination method, and its authenticity determination device, and more particularly, to an information carrier capable of sufficiently preventing forgery and alteration and its authenticity determination. The present invention relates to a method and an authenticity determination device.

[0002]

2. Description of the Related Art In recent years, with the spread of color copying machines, there have been a lot of cases where counterfeit securities such as stocks, bonds, checks, passbooks and lottery tickets are forged.

On the other hand, ID cards, bank cards, medical examination cards, which are widely used in companies, schools, banks, hospitals, etc.
Even in the case of an information-bearing card having a unique information entry field such as a membership card, there are many cases where the unique information entry field is tampered with, altered or misused.

Therefore, conventionally, in order to prevent such forgery and alteration, a printing ink containing an infrared absorbing substance such as carbon black or leuco dye is used, and it is applied to an arbitrary portion of the above-mentioned securities or information carrying card. A method of providing a machine-readable information pattern with an infrared reading device is adopted.

[0005]

However, since the above infrared absorbing substances such as carbon black and leuco dyes have a light absorbing property even in the visible region, the above information pattern is mechanically read by an infrared reading device. At the same time, its presence is easily readable by the naked eye, and it is still insufficient as a means for effectively preventing the above-mentioned forgery and alteration.

The present invention has been made by paying attention to such a problem, and an object thereof is to provide an information carrier capable of sufficiently preventing forgery, alteration, etc., and a method for judging its authenticity. It is to provide a true / false determination device.

[0007]

That is, an information carrier according to the invention of claim 1 is a substrate, an information pattern provided on the substrate, an information pattern provided adjacent to the information pattern, and colorless at room temperature. Alternatively, it is characterized by comprising an auxiliary pattern composed of an ink that exhibits substantially the same color as the above-mentioned substrate and that develops or changes color to a color different from that of the substrate by heating or cooling.

Further, according to the information carrier of the present invention, the auxiliary pattern provided on the substrate is colorless or has substantially the same color as that of the substrate at room temperature, so that it is difficult to see. Therefore, it is possible to prevent counterfeiting or alteration of the information carrier having the information pattern and the auxiliary pattern. Further, since this auxiliary pattern is composed of ink that develops or changes color to a color different from that of the substrate when the information carrier is heated or cooled, it is possible to visualize the auxiliary pattern by such heat treatment. Therefore, it is possible to judge visually or by a reading device whether the information carrier is a counterfeit or the like which does not have such an auxiliary pattern.

Next, the inventions according to claims 1 and 2 relate to the invention in which the ink forming the auxiliary pattern is specified.
That is, a colorless electron-donating color-forming organic compound, a compound having a phenolic hydroxyl group that acts on this compound to change its color, and a compound that chemically lowers this coloring function (hereinafter referred to as desensitization) Appropriately mix the three components,
The present invention relates to an invention in which an ink is prepared by dissolving or dispersing this in a vehicle, or dispersing the three components encapsulated in microcapsules in a vehicle.

That is, both the inventions according to claim 2 and claim 3 are premised on the information carrier according to the invention according to claim 1, and the invention according to claim 2 is characterized in that the ink forming the auxiliary pattern is electronic. An ink composed of a donor organic compound, a compound having a phenolic hydroxyl group, and a non-volatile compound that desensitizes the color reaction of these two compounds as a main component, which is dissolved or dispersed in a vehicle. The invention according to claim 3 is characterized in that the ink forming the auxiliary pattern comprises an electron-donating color-forming organic compound, a compound having a phenolic hydroxyl group, and two compounds of these compounds. Characterized by an ink composed mainly of a non-volatile compound that desensitizes a color reaction, and a mixture of these contained in microcapsules dispersed in a vehicle A.

In the inventions according to claims 2 and 3, the color is selected with an electron-donating color-developing organic compound, the color is determined with a compound having a phenolic hydroxyl group to determine the concentration, and alcohols and esters are further added. The color change temperature can be determined by the kind or compounding amount of any one of the compounds such as, ketones and ethers. In other words, approximately -100 ° C to 20
It is possible to change from subtle color to colorless by changing the color of red, blue, yellow, green, orange, violet, and other colors at a temperature between 0 ° C and from colorless to colored by combining the above substances appropriately. Further, it is possible to change from one color to another color by additionally adding a general dye, pigment or the like.

In the present invention, the above-mentioned electron-donating color-forming organic compound includes diarylphthalides,
Examples include polyaryl carbinols, leuco auramines, rhodamine B lactams, indolines, spiropyrans, fluorans and the like. Examples of these compounds are crystal violet lactone, malachite green lactone, Michler hydrol, crystal violet carbinol, malachite green carbinol, N- (2,3-dichlorophenyl) leuco auramine, N-benzoyl auramine. , N-acetyl auramine, N-phenyl auramine, rhodamine B lactam,
2- (phenyliminoethanedilidene) 3,3-dimethylindoline, N-3,3-trimethylindolinobenzospiropyran, 8-methoxy-N. There are 3,3-trimethylindolinobenzospiropyran, 3-diethylamino-6-methyl-7-chlorofluorane, 3-diethylamino-6-benzyloxyfluorane, 1,2-benz-6-diethylaminofluorane and the like.

Examples of the compound having a sublimable or volatile phenolic hydroxyl group include p-ethylphenol, o-ethylphenol, p-cresol, o-cresol, m-cresol, 2,4-xylenol and pyrocatechol. , Resorcin, methylcatechol, ethylcatechol, propylcatechol, t-butylcatechol, α-naphthol, thymol, eugenol, isoeugenol, methyl p-oxybenzoate, ethyl p-oxybenzoate, propyl p-oxybenzoate, p. -Butyl oxybenzoate and the like.

Examples of the compound having a non-volatile phenolic hydroxyl group include nonylphenol, dodecylphenol, styrenated phenol, 2,2'-methylenebis (4-methyl-6-t-butylphenol), 2,4. 6 trichlorophenol, o-phenylphenol, p-phenylphenol, p- (p-chlorophenyl) phenol, o- (o-chlorophenyl)
Phenol, octyl p-oxybenzoate, dodecyl p-oxybenzoate, bisphenol A, 1,2-dioxynaphthalene, 2,3-dioxynaphthalene, phenolphthalein, o-cresolphthalein, propyl protocatechuate Butyl protocatechuate, octyl protocatechuate, dodecyl protocatechuate,
2,3,4-trioxyethylbenzene, methyl gallate, ethyl gallate, propyl gallate, butyl gallate, hexyl gallate, octyl gallate, dodecyl gallate, cetyl gallate, stearyl gallate, 2,
3,5 trioxynaphthalene, tannic acid, phenol resin initial condensation product, and the like.

Examples of the non-volatile and hydrophilic compound having a phenolic hydroxyl group include gallic acid, methyl gallate, ammonium gallate, tannic acid, protocatechuic acid, methyl protocatechuate, and ethyl protocatechuate. , Ammonium protocatechuate, dioxynaphthalene, sodium sulfonate and the like.

As the non-volatile compound having a desensitizing action, for example, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, eicosyl alcohol, docosyl alcohol, triethylene glycol, polyethylene glycol (molecular weight 200,4
00,600,1500,4000,6000,200
00), trimethylolpropane, diethanolamine, triethanolamine, triisopropanolamine, quaternary ammonium salt, polyoxyethylene alkylamine, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, sorbitan fatty acid ester, sucrose ester, Dimethyl phthalate,
Diethyl phthalate, 12-hydroxystearic acid triglyceride, methyl 12-hydroxystearate,
Castor oil, methyl ricinoleate, butyl myristate,
There are butyl palmitate, methyl stearate, ethyl stearate, butyl stearate, octyl stearate, butyl oleate, polyvinylpyrrolidone, hydroxypropyl cellulose and the like.

As the non-volatile hydrophilic compound having a desensitizing action, for example, triethylene glycol, polyethylene glycol (molecular weight 200, 400, 60) is used.
0, 1500, 4000, 6000, 20000), dipropylene glycol, diethylene glycol monobutyl ether, glycerin, trimethylolpropane, hydroxypropyl cellulose, diethanolamine, triethanolamine, triisopropanolamine, quaternary ammonium salt, polyoxyethylene alkylamine , Polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, sorbitan fatty acid ester, sucrose ester, polyvinylpyrrolidone, diethylene glycol acetate, diethylene glycol monobutyl ether acetate and the like.

Among the above-mentioned electron-donating color-developing organic compounds, compounds having a phenolic hydroxyl group, and non-volatile compounds that desensitize the color reaction of these two compounds, they are liquid at room temperature (normal temperature). It also includes those that easily volatilize. Further, in order to increase the storage stability when the auxiliary pattern is formed by this ink and to make the color change more diversified, it is possible to obtain a better effect when using the colorant encapsulating the three components in microcapsules. There are combinations that can That is, it is preferable to always maintain the above three-component colorant in the same system homogeneously, and it is possible that the compounding ratio of the three components remarkably changes by separating out of the system due to volatilization or outflow even in the components in the three components. Not favorable for thermal discoloration performance. Therefore, by applying a known microencapsulation technique to enclose the colorant in the microcapsules, it is possible to solve the above-mentioned inconveniences and dramatically improve the thermochromic performance (claim 3). .

Further, as the vehicle applicable in the inventions according to claims 2 to 3, those exemplified below can be used.

Cooled and solidified (wax type) carnauba wax, paraffin wax, microcrystalline wax and the like.

Evaporation dry type (resin / solvent type) rosin, rosin maleate, shellac, casein, alkyd resin, cellulose derivative, petroleum resin, low molecular weight polyethylene, polystyrene, polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, petroleum Solvents, aromatic solvents, alcohols, ketones, esters, water, etc.

Permeation dry type (resin / petroleum solvent type) rosin, rosin derivative, machine oil, spindle oil, kerosene, etc.

Gelled dry type (emulsion type) vinyl copolymer latex, synthetic rubber latex and the like.

(Resin / solvent type) Alkyd resin, modified rubber, petroleum solvent, etc.

Oxidation polymerization type (dry oil type) polymerization linseed oil, tung oil, dehydrated castor oil, oily deer oil and the like.

(Oil Modified Alkyd Type) Soybean oil modified, alkyd resin, coconut oil modified alkyd resin, linseed oil modified alkyd resin and the like.

Thermosetting (thermosetting resin) epoxy resin, amino resin, heat-reactive unsaturated hydrocarbon resin, etc.

Next, the invention according to claim 4 relates to claim 1,
On the premise of the information carrier according to the invention described in 2 or 3, it is characterized in that the information pattern and the auxiliary pattern are constituted by a Carla code.

The invention according to claim 5 is the same as claim 1,
Based on the authenticity determination method for determining the authenticity of the information carrier according to the invention described in 2, 3, or 4, the ink forming the auxiliary pattern is colored in a color different from that of the substrate by heating or cooling the information carrier. Alternatively, the color is changed, and when the pattern obtained by superimposing the auxiliary pattern and the information pattern visualized by coloring or color change does not match the information pattern, it is determined to be true, and when they match, it is determined to be false. To do.

Further, the invention according to claim 6 is the invention according to claim 1,
Based on the authenticity determination device for determining the authenticity of the information carrier according to the invention described in 2, 3, or 4, the first reading unit that reads the information pattern of the information carrier, and the information carrier is heated or A second reading in which a pattern reproducing section that visualizes the auxiliary pattern by coloring or changing the color of the ink that forms the auxiliary pattern to a color different from that of the substrate and the visualized auxiliary pattern and the above information pattern are read Section, a determination section that determines true when the pattern read by the second reading section does not match the pattern read by the first reading section, and a false determination when the pattern matches the pattern read by the first reading section; The image forming apparatus is characterized by further comprising an erasing section which cools or heats the information carrier to change the color of the ink forming the auxiliary pattern to a colorless or substantially the same color as the substrate to form the auxiliary pattern as a latent image.

In the inventions according to claims 1 to 6, various information such as a driver's license, a commuter pass, an ID card, a credit card, a cash card, a gift card, etc. are applicable to the information carrier. Examples of securities-related products such as plastic cards and prepaid cards typified by telephone cards can be used instead of cash vouchers.

[0032]

According to the information carrier of the first aspect of the present invention, the auxiliary pattern provided on the substrate is colorless or has substantially the same color as that of the substrate at room temperature, so that it is difficult to see. Therefore, it is possible to prevent counterfeiting or alteration of the information carrier having the information pattern and the auxiliary pattern. Further, since this auxiliary pattern is composed of ink that develops or changes color to a color different from that of the substrate when the information carrier is heated or cooled, it is possible to visualize the auxiliary pattern by such heat treatment. Therefore, it is possible to judge visually or by a reading device whether the information carrier is a counterfeit or the like which does not have such an auxiliary pattern.

On the other hand, according to the information carrier of the second aspect of the invention, the ink forming the auxiliary pattern has an electron-donating color-forming organic compound, a compound having a phenolic hydroxyl group, and these two compounds. 4. An ink comprising a non-volatile compound as a main component that desensitizes the color reaction of, dissolved or dispersed in a vehicle.
According to the information carrier of the invention described above, the ink forming the auxiliary pattern desensitizes the color reaction of the electron-donating color-forming organic compound, the compound having a phenolic hydroxyl group, and these two compounds. Non-volatile compounds as the main component, and a mixture of these is encapsulated in microcapsules and dispersed in a vehicle to form an ink that is colorless or has a color almost the same as that of the substrate at room temperature. This makes it possible to reliably form an auxiliary pattern that develops or changes color to a color different from that of the substrate.

Next, according to the information carrier of the invention described in claim 4, since the information pattern and the auxiliary pattern are constituted by the Carla code, various kinds of information can be carried and at the same time the Carla code is used. It is possible to easily determine the authenticity by using the reading device.

Further, according to the authenticity determination method of the information carrier according to the invention of claim 5, the ink forming the auxiliary pattern by heating or cooling the information carrier is colored or discolored to a color different from that of the substrate. Then, when the pattern obtained by superimposing the auxiliary pattern and the information pattern visualized by coloring or discoloring does not match the above information pattern, it is determined to be true, and when it is determined to be false, the information carrier The authenticity can be easily determined, and the forgery and alteration can be sufficiently prevented.

According to the authenticity determining device of the sixth aspect of the present invention, the first reading unit for reading the information pattern of the information carrier and the auxiliary pattern by heating or cooling the information carrier are formed. A pattern reproducing unit that develops or changes the color of the ink to a color different from that of the substrate to visualize the auxiliary pattern; a second reading unit that reads the visualized auxiliary pattern and the information pattern in an overlapping manner; When the pattern read by the reading unit does not match the pattern read by the first reading unit, the determination unit determines whether the pattern is true, and when the pattern matches, determines the determination is false, and after the determination, the information carrier is cooled or Equipped with an erasing part that heats the ink forming the auxiliary pattern to be colorless or changes its color to almost the same color as the substrate to make the auxiliary pattern a latent image. It is possible to determine, and,
By making the auxiliary pattern a latent image after the determination, the existence of the auxiliary pattern itself is not known, and it is possible to sufficiently prevent counterfeiting or alteration of the information carrier.

[0037]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[Example 1] "Preparation of ink for auxiliary pattern" Electron-donating color-forming organic compound: trade name PSD-V 1 part by weight [fluoran compound manufactured by Nisso Kako Co., Ltd.] Phenol-containing hydroxyl group Compound: Cetyl gallate 10 parts by weight Desensitizing compound: Cetyl alcohol 20 parts by weight First, the above three-component compound is heated and dissolved to homogenize it to obtain Colorant A.

Next, 10.0 parts by weight of this colorant A and 90.0 parts by weight of paraffin wax were heated and dissolved to prepare an ink for an auxiliary pattern.

The auxiliary pattern ink is colorless at room temperature and has the property of turning vermilion when heated to about 57 ° C. and becoming colorless when cooled to 57 ° C. or lower.

Then, the following information-bearing card 1 was obtained by using the ink for the auxiliary pattern. That is, as shown in FIGS. 1 and 2, the information carrying card 1 according to this embodiment has a white card base 2, and an information pattern 4 provided on the base 2 with a vermilion visible light ink. A main part of the auxiliary pattern 6 is formed adjacent to the information pattern 4 and is formed of the auxiliary pattern ink.

As the card base 2, a material that can be used as a card, such as synthetic paper, polyvinyl chloride or polyethylene terephthalate (PET), can be applied, and its color depends on the color tone of the heat-discoloring ink to be applied. It is selected as appropriate.

The information pattern 4 and the auxiliary pattern 6 are used.
Are both constituted by a Carla code as shown in FIG. This Carla code has four cells as one unit,
16 patterns are obtained by selectively painting the cells with ink, and a plurality of (5 in the illustrated example) one unit is arranged and combined to obtain a large number of numerically or symbolically information (for example, Information such as member numbers) can be carried.

According to the information-carrying card 1 thus constructed, the color of the auxiliary pattern 6 provided on the base 2 is colorless at room temperature so that it is not visually recognized. It is possible to prevent forgery and alteration of the information carrying card provided with the pattern 6. When the information carrying card 1 is judged to be genuine or false, if the card 1 is heated to a temperature of 57 ° C. or higher, the auxiliary pattern 6 develops a vermilion color, and therefore, the information pattern 4 and the visible image. The authenticity can be determined by reading the converted auxiliary pattern 6 with a reading device.
That is, since the counterfeit card is made by imitating only the information pattern 4 on the surface and does not have the auxiliary pattern 6, the auxiliary pattern 6 is visualized even if the counterfeit card is heated to a temperature of 57 ° C. or higher. It is possible to easily determine that it is counterfeit. Since both the information pattern 4 and the auxiliary pattern 6 are composed of Carla code,
By making the auxiliary pattern 6 visible by heating the information carrying card 1 to a temperature of 57 ° C. or higher (see FIGS. 3 to 4), it is possible to make a genuine / counterfeit judgment by using a reading device for reading a Carla code. You can

Next, the authenticity determination method of the information carrying card 1 will be described. First, since the auxiliary pattern 6 of the information carrying card 1 is colorless at room temperature, only the information pattern 4 is read by the visible light or infrared reading device.

When determining the authenticity of the information-bearing card 1, if the information-bearing card 1 is heated to a temperature of 57 ° C. or higher, the auxiliary pattern 6 develops a vermilion color as shown in FIGS. And then visualized. Therefore, when the information carrying card 1 is read again by a visible light or infrared reading device, the auxiliary pattern 6 is visualized, and the reflectance with respect to visible light or infrared rays is different from that when it is colorless at room temperature. The pattern 6 is read, and the pattern in which the information pattern 4 and the auxiliary pattern 6 are overlapped can be read as a whole.

That is, in the case of the genuine information carrying card 1 having the auxiliary pattern 6, the overlapping pattern 7 in which the information pattern 4 and the auxiliary pattern 6 are overlapped can be detected as shown in FIG. However, in the case of a counterfeit card that does not include the auxiliary pattern 6 that imitates only the information pattern 4, the auxiliary pattern 6 is not formed as shown in FIG. Will be detected. Therefore, when the pattern obtained by overlapping the information pattern 4 and the auxiliary pattern 6 does not match the information pattern 4 (that is, the overlapping pattern 7), it is true, and when they match (that is, the single pattern 8 By determining as false in some cases), it is possible to easily determine the authenticity of the information carrying card 1, and it is possible to sufficiently prevent the forgery and alteration.

FIG. 6 shows an embodiment of a genuineness / counterfeit judging device used for judging the authenticity of such an information carrying card 1. The authenticity determination device 9 includes a card slot 11 for inserting and ejecting the information carrying card 1 on the front surface of the main body casing 10.
In the main body casing 10, there is provided a card transfer path 12 composed of a roller conveyor for reciprocally transferring the information carrying card 1 inserted from the card port 11 in the insertion direction. Then, in the main body casing 10, a reproducing section 13 that heats the information carrying card 1 to 57 ° C. or more to visualize the auxiliary pattern 6 and the information carrying card 1 is cooled to a temperature of 57 ° C. or less. An erasing section 14 for making the auxiliary pattern 6 a latent image and a reading section 15 for reading the information pattern 4 and the auxiliary pattern 6 of the information carrying card 1 are sequentially arranged along the card transfer path 12.

The reading section 15 has the information carrying card 1
The first reading unit that reads the information pattern 4 and the second reading unit that reads the information pattern 4 and the visualized auxiliary pattern 6 in an overlapping manner. As the reading unit 15, a CCD camera (trade name TCD1500C manufactured by Toshiba Corporation) having sensitivity up to near infrared is used.

When the information carrying card 1 is inserted into the card slot 11 in the main body casing 10, the information carrying card 1 is first transferred to the reading section 15 to read the information pattern 4, and then the information carrying card 1 is reproduced. After transferring to the part 13 to visualize the auxiliary pattern 6, the information carrying card 1 is transferred to the reading part 15 again to read the information pattern 4 and the auxiliary pattern 6 in an overlapping manner, and after the authenticity determination, the above information is read. A control unit 16 is provided to control the card transfer path 12, the reading unit 15, the reproducing unit 13, and the erasing unit 14 so that the carrier card 1 is transferred to the erasing unit 14 to erase the auxiliary pattern 6 and ejected from the card slot 11. Has been. The control unit 16 determines that the information pattern 4 first read by the reading unit 15 is true when the pattern does not match the pattern read again after the auxiliary pattern 6 is visualized, and determines false when the pattern matches. There is provided a determination unit 17 for performing the determination and an output unit 18 such as a display lamp for outputting the determination result and an alarm.

According to the authenticity determination device 9 configured as described above, the authenticity of the information carrying card 1 can be easily determined mechanically, and after the determination, the auxiliary pattern 6 is formed into a latent image to assist. The existence of the pattern 6 itself is not known, and it is possible to sufficiently prevent the information carrying card 1 from being forged or altered.

Although the Carla code is used as the information pattern 4 and the auxiliary pattern 6 in this embodiment, a bar code may be used instead of the Carla code. In this case, a bar code reader can be used as the reading unit 15. Although the information carrier is an information carrier card in this embodiment, the information carrier may be a sheet-shaped information carrier sheet applicable to securities such as stock certificates, checks and lottery tickets. In this case, as a matter of course, the base material does not need to be a material that can be used as a card. Further, although the information pattern 4 and the auxiliary pattern 6 are provided in parallel on the base body 2 in this embodiment, the information pattern 4 may be provided on the auxiliary pattern 6 as shown in FIG. Further, in the information carrying card 1 according to this embodiment, the auxiliary pattern 6 is applied with an ink which develops a vermillion color when heated to about 57 ° C., but an ink which is colorless at normal temperature and develops when cooled is applied. May be. In this case, the reproducing section 13 functions as an erasing section, and the erasing section 14 functions as a reproducing section.
Also, regarding the reproduction section 13 and the erasing section 14,
A heating or cooling roller, a heating or cooling plate, a heater having an appropriate structure, or the like is applied.

Example 2 In this example, as the auxiliary pattern ink, the following ink was applied, which was colorless at room temperature, developed a color at about 55 ° C. or higher and exhibited a blue color, and returned to colorless when cooled to 55 ° C. or lower. The third embodiment is substantially the same as the first embodiment except that the visible light ink of blue color is applied as the ink forming the information pattern 4.

"Preparation of Ink for Auxiliary Pattern" Electron-donating color-developing organic compound: 1 part by weight Crystal violet lactone Compound having phenolic hydroxyl group: 10 parts by weight Methyl p-oxybenzoate Desensitizing compound: Cetyl alcohol 20 parts by weight Part First, the above three-component compound is heated and dissolved to be homogenized to obtain a colorant B.

Next, 80% in 80 g of a 5% gelatin aqueous solution is used.
30 g of colorant B heated to 0 ° C. is added dropwise, and the mixture is stirred so as to form fine droplets. Further, add 80 g of 5% arabic gum,
Under constant stirring, add acetic acid to lower the pH to 5, 200 g
Water is added to cause coacervation and pH
To 4.4, followed by the addition of 1 g of 37% formalin for dura, the previous operation was kept at a temperature of 50 ° C, then cooled to 10 ° C to gel the thick liquid film. Further, the pH was raised to 9 and left for several hours to obtain a colorant B-containing capsule.

Next, this colorant B-containing capsule 20.0
By weight, 50.0% Metroses 90sH aqueous solution (methyl cellulose manufactured by Shin-Etsu Chemical Co., Ltd.) 70.0 parts by weight and Wall Pole 9130 (vinyl acetate emulsion manufactured by Dainippon Ink and Chemicals Co., Ltd.) 10.0 parts by weight are thoroughly mixed to homogenize and assist A pattern ink was prepared.

[0057]

According to the first aspect of the present invention, since the auxiliary pattern provided on the substrate is colorless or has substantially the same color as that of the substrate at room temperature, it is difficult to see the information pattern and the auxiliary pattern. It has an effect of preventing forgery and alteration of the information carrier provided with.

Further, since the above-mentioned auxiliary pattern is composed of an ink that develops or changes color to a color different from that of the substrate when the information carrier is heated or cooled, it is possible to visualize the auxiliary pattern by heat treatment. The present invention has an effect of enabling visual judgment or a reading device to judge whether the information carrier is an authentic information carrier that is not provided with such an auxiliary pattern.

According to the second aspect of the invention, the ink for forming the auxiliary pattern exhibits the color reaction of the electron-donating color-forming organic compound, the compound having a phenolic hydroxyl group, and these two compounds. According to the invention of claim 3, the ink which forms the auxiliary pattern has an electron-donating property, and is composed of a non-volatile compound which is desensitized as a main component and which is dissolved or dispersed in a vehicle. A color-forming organic compound, a compound having a phenolic hydroxyl group, and a non-volatile compound that desensitizes the color reaction of these two compounds as the main components, and a mixture of these is encapsulated in a microcapsule in a vehicle. An auxiliary pattern that is colorless or has a color almost the same as that of the substrate at room temperature and develops or changes color to a color different from that of the substrate when heated or cooled because it is composed of ink dispersed in Have surely formed can effect the emissions.

Next, according to the invention of claim 4, since the information pattern and the auxiliary pattern are constituted by the Carla code, various kinds of information can be carried and a reading apparatus for the Carla code is used. It has an effect that the authenticity can be easily determined.

According to the invention of claim 5, the ink carrying the auxiliary pattern is colored or changed to a color different from that of the substrate by heating or cooling the information carrier, and visualized by the coloring or the color change. When the pattern obtained by superimposing the auxiliary pattern and the information pattern does not match the above-mentioned information pattern, it is true, and when it is determined to be false, it is possible to easily determine whether the information carrier is true or false. It has the effect of being able to sufficiently prevent its forgery and alteration.

Further, according to the invention of claim 6, the first reading portion for reading the information pattern of the information carrier, and the ink forming the auxiliary pattern for heating or cooling the information carrier are different in color from the substrate. A pattern reproducing unit that develops or changes the color of the auxiliary pattern to visualize the auxiliary pattern, a second reading unit that reads the visualized auxiliary pattern and the information pattern in an overlapping manner, and a second reading unit. A determination unit that determines true when the pattern does not match the pattern read by the first reading unit and determines false when the pattern matches and forms an auxiliary pattern by cooling or heating the information carrier after the determination. Equipped with an erasing section that makes the auxiliary pattern a latent image by changing the ink colorless or almost the same color as the substrate, it is possible to easily determine the authenticity of the information carrier mechanically. Ri and counterfeiting of existence also known that there is no information carrier auxiliary pattern by a latent image of the auxiliary pattern after determination has the effect of reliably preventing forgery or the like.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment in which the present invention is applied to an information carrying card.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is a plan view of an information carrier card in which the auxiliary pattern is visualized.

FIG. 4 is an enlarged sectional view taken along line BB of FIG.

FIG. 5 is a diagram for explaining authenticity determination of the information bearing card.

FIG. 6 is a block diagram of an authenticity determination device for an information carrying card.

FIG. 7 is a cross-sectional view showing a modified example of the information carrying card.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Information carrying card (information carrying body) 2 Substrate 4 Information pattern 6 Auxiliary pattern 9 Authenticity judging device 13 Reproducing section 14 Erasing section 15 Reading section 17 Judging section

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B41M 3/14 G03G 21/04 G06K 17/00 S 19/10

Claims (6)

[Claims] 1. A substrate, an information pattern provided on the substrate, and a color which is provided adjacent to the information pattern and is colorless or has a color substantially the same as that of the substrate at room temperature and different from the substrate by heating or cooling. An information carrier, comprising: an auxiliary pattern composed of an ink that develops or changes color. 2. The main component of the ink for forming an auxiliary pattern is an electron-donating color-forming organic compound, a compound having a phenolic hydroxyl group, and a non-volatile compound that desensitizes the color reaction of these two compounds. The information carrier according to claim 1, characterized in that the ink is formed by dissolving or dispersing this in a vehicle. 3. The main component of the ink for forming an auxiliary pattern is an electron-donating color-forming organic compound, a compound having a phenolic hydroxyl group, and a non-volatile compound that desensitizes the color reaction of these two compounds. 2. The information carrier according to claim 1, wherein the mixture is composed of an ink in which microcapsules are encapsulated and dispersed in a vehicle. 4. The information carrier according to claim 1, 2 or 3, wherein the information pattern and the auxiliary pattern are constituted by a Carla code. 5. A true / false determination method for determining the authenticity of an information carrier according to claim 1, 2, 3 or 4, wherein ink for forming an auxiliary pattern by heating or cooling the information carrier is used. When the pattern obtained by superimposing the auxiliary pattern and the information pattern visualized by the color development or discoloration on the color different from the color of the substrate and the information pattern does not match the above information pattern, the result is true, and when the pattern matches, the result is false. A method for judging authenticity of an information carrier, characterized by judging. 6. An authenticity determination device for determining the authenticity of an information carrier according to claim 1, 2, 3 or 4, comprising: a first reading unit for reading an information pattern of the information carrier; A pattern reproducing unit that visualizes or changes the color of the ink that forms the auxiliary pattern by heating or cooling the information carrier to a color different from that of the substrate, and the visualized auxiliary pattern and the above information pattern are superimposed. And a second reading unit that reads the image by the second reading unit and the pattern read by the second reading unit does not match the pattern read by the first reading unit; And an erasing unit that cools or heats the information carrier after determination to make the ink forming the auxiliary pattern colorless or substantially the same color as the substrate to make the auxiliary pattern a latent image. Authenticity determination apparatus of the broadcast carrier.