JPH10203001A - Double-recording method of information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recording method which provides accuracy of information recording with a recording medium having a magnetic recording layer and an optical recording layer and can confirm tampering of recorded information and forgery of a magnetic record card. SOLUTION: In a method wherein information is to be recorded by a magnetic material and a material containing an infrared rays absorbing coloring matter on the same substrate of a ticket or a card, the same information is recorded in such a manner that the former records on a magnetic recording layer arranged on the substrate by the magnetic recording method and the latter records on the substrate by using a dry developer containing infrared rays absorbing coloring matter by the electrophotographic method or the electrostatic printing method so as not to be visually distinguished substantially or be difficult to distinguish. By comparing these records, tampering or forgery of the ticket or the card can be confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording image information, and more particularly to a method for recording information by simultaneously recording the same image information magnetically and simultaneously using an infrared absorbing dye. The present invention relates to a method for recording image information, which is capable of easily confirming falsification of recorded information and forgery of an information recording card or the like by maintaining accuracy and collating both recorded information.

[0002]

2. Description of the Related Art Conventionally, bank passbooks, checks, air tickets, road tickets, tickets, admission tickets, prepaid cards, etc.
Telephone rate cards, ticket purchase cards, admission ticket purchase cards, play fee cards, etc. and identification cards, tickets or cards related to bank automatic payment such as bank deposit number cards, etc., as well as confidential documents, materials, information, etc. Image information such as letters, numbers, symbols, patterns, etc. recorded by the company may need to be kept confidential to third parties and concealed so as not to be misused. In many cases, magnetic ink is used to record the information Magnetic recording is used.

[0003]

However, in an information recording system using magnetic ink, the magnetic strength changes when the magnetic material used is exposed to heat or placed in an environment with a strong magnetic field. Or the magnetism disappears. There is also a problem that information is read or falsified. In order to prevent counterfeiting of commuter passes, etc., an optical recording layer consisting of a magnetic recording layer, an infrared reflection layer, and an infrared absorption layer provided thereon is provided on the base, and hidden characters and Although securities for recording patterns and the like are disclosed in Japanese Patent Application Laid-Open No. 61-297192, this document does not disclose prevention of falsification of recorded information.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method of recording information on a ticket or a card which can ensure the accuracy of the recording of the information and which can easily confirm the falsification of the recorded information and the forgery of an information recording card. To provide.

[0005]

The above object is achieved by the present invention described below. That is, the present invention provides a method of recording information on the same substrate of a ticket or card using a magnetic material and a material containing an infrared-absorbing dye, respectively. The layer is recorded by a magnetic recording device, and the other is electrophotographically or electrostatically printed on a substrate using a dry developer containing an infrared absorbing dye so that it is practically indistinguishable or difficult for the naked eye. This is a double recording method of information characterized in that it is possible to confirm tampering or forgery of a ticket or card by recording and collating both recorded information.

[0006]

Next, the present invention will be described in more detail with reference to preferred embodiments. The feature of the present invention is that the same information is double-recorded by double recording of the same information by recording on a magnetic recording layer provided on any substrate and recording with an infrared absorbing material, so that one of the recorded information is unconscious or This is to make it possible to confirm any conscious change. Recording by electrophotography or electrostatic printing does not require the use of a dedicated printing device or the production of a printing plate, and individual information that is different for each ticket or card can be recorded immediately, and the recording is irreversible. It is difficult to consciously modify information, such as erasing, because of the nature.
Also, for recording with infrared absorbing material, if necessary,
By overlaying a concealing layer containing an infrared-reflective dye on the recording portion, it is possible to visually conceal or deceive the recorded image information.

The substrate used in the present invention includes:
For example, paper, synthetic paper with synthetic fibers, synthetic paper, polyester,
A conventionally well-known recordable or recordable substrate such as a plastic film or sheet of polyimide, polyethylene, polystyrene, nylon or the like is used. The shape of the base to be used includes, for example, a card cut to an arbitrary size in addition to various standardized sizes.

In the present invention, the magnetic recording layer provided on the base is conventionally known as an information recording layer for commuter passes, various cash cards, and the like. , Γ-iron oxide,
A known material such as cobalt-modified γ-iron oxide is used.
The magnetic recording layer is formed by adding these magnetic materials to a vehicle or an aqueous emulsion comprising a binder and an organic solvent used in the production of a normal magnetic recording medium such as a vinyl chloride-vinyl acetate copolymer, and a plasticizer, a lubricant, and a charging agent. It is formed by applying a magnetic coating liquid dispersed in a material to which an inhibitor or the like has been added to a substrate. In order to disperse the magnetic material, a dispersing machine such as a ball mill, a roller mill, a sand mill, and a vibration mill is generally used. The obtained magnetic coating liquid is applied to a substrate using, for example, a gravure coater, a reverse roller coater, a doctor blade coater, or the like, and is dried after passing through a magnetic field before the coating liquid is dried.

The magnetic recording layer may be formed on a substrate by vacuum deposition, sputtering, plating, or the like using a metal or alloy such as iron, iron-cobalt, iron-chromium, and cobalt-chromium.

The recording of information on a substrate by an infrared absorbing material is performed by using a dry developer containing an infrared absorbing dye or an infrared reflective dye used together with the dye as required, and utilizing an electrostatic effect to make use of an electron. This is performed using a photographic method or an electrostatic printing method. In the present invention, the infrared-absorbing dye used for recording image information such as characters, numbers, and patterns has a large absorption in an infrared region used for detecting (reading) recorded information, and therefore, reflects infrared rays. It is necessary that the rate be distinctly low or hardly reflective.

As the infrared absorbing pigment used in the present invention, conventionally known pigments or dyes having the above-mentioned properties can be used. For example, carbon black pigment, aniline black pigment, iron oxide black pigment, titanium oxide Black pigments such as a system black pigment and a spinel-type structure black pigment are exemplified, and a particularly preferred black pigment is a carbon black pigment.

In order to visually hide or deceive image information recorded with a dry developer containing an infrared absorbing dye, the information is recorded with at least the dry developer on a substrate. It is necessary that a concealing layer using a dry developer containing an infrared-reflective dye or an intermediate thereof is formed in advance on the portion or after recording information with the dry developer. The concealing layer is preferably provided on the entire surface of the substrate on a surface where the information recording portion exists, in order to conceal the existence of the information recording portion itself on the substrate. The method of forming the concealing layer is not particularly limited, but it is preferable to use a dry image-reducing agent for the formation of the layer, since information recording and formation of the concealing layer can be carried out using the same apparatus. Needless to say, the concealing layer may be formed by a method.

As the infrared-reflective dye or the intermediate thereof used for forming the hiding layer, conventionally known dyes or intermediates having such properties can be used. Phthalocyanine type, azo type, azomethine type, azomethine azo type, anthraquinone type, perylene / perinone type, indigo / thioindigo type, dioxazine type, quinacridone type, dipyrrolopyrrole type, isoindoline / isoindolinone type, triphenylmethane phthalide Pigments and dyes such as a series leuco dye and a fluoran leuco dye, and intermediates thereof, and these can be used alone or in combination of two or more. The triphenylmethane-phthalide leuco dye is used as a dye which develops a stable and thermosensitive color developing from colorless to colored. Crystal violet lactone develops blue color, rhodamine lactam develops red color, and fluoran black leuco dye develops black color in visible region, and shows reflectivity in infrared region.

Among the above-mentioned infrared reflective dyes and intermediates, particularly preferred dyes having an azomethine group or intermediates thereof include, for example, JP-A-58-174446, JP-A-59-4775, and JP-A-59-4775. No. 106381
No. 6, specification No. 1052019, specification No. 1
No. 141514, Patent No. 11411515, Japanese Patent Application No. 60-168540, Japanese Patent Application No. 60-168540.
Dyes and intermediates disclosed in 277929.

In particular, an azo pigment using 2-hydroxy-α-benzocarbazole-carboxylic acid allylamide or a derivative thereof as a coupling component exhibits a dark blue to black color tone under visible light, and particularly has a blackness of black. This is preferable because it shows high vivid black color. Among them, dark blue having an azomethine azo group described above
Black pigments are excellent in heat resistance, light resistance, water resistance, and chemical resistance, and have higher coloring power. In addition, pigment-type dyes exhibit extremely excellent solvent resistance.

The above are examples of the infrared-reflective dyes and intermediates thereof particularly preferably used in the present invention. In the present invention, other dyes and mixed colors such as red,
A compound color obtained by appropriately mixing blue, yellow, orange, purple, and brown dyes can also be used as the infrared reflective dye.

In the present invention, the term "infrared reflective dye" refers to a case where the dye itself reflects infrared light, and a case where the dye itself transmits infrared light, for example, a paper or plastic sheet, Infrared rays are reflected by a metal or the like, and both dyes having a property of emitting infrared rays through the colored portion again are meant. Accordingly, in the present invention, a dye having a high infrared transmittance is also included in the "infrared reflective dye" of the present invention, and is preferably used because it is used for superposition with an infrared absorbing dye layer.

The dyes or intermediates thereof used for recording the information and forming the concealing layer are all used as a dry developer containing them, ie, a recording powder ink.
The recording powder ink is used, for example, as a powder ink having the same configuration as a conventionally known recording powder ink and the like, and a representative example is a fusible fine powder ink system in a toner or the like of an electrostatic copying machine. .

The recording powder ink is usually composed of the above-mentioned dye or its intermediate, a binder resin, a charge controlling agent (a chromium complex dye,
Negative CC such as sulfonylamine of copper phthalocyanine
A, positive electrode C such as nigrosine dye, quaternary ammonium salt, etc.
CA), additives (release agents, surface treatment agents, etc.), and in some cases, carriers such as iron powder and magnetic iron powder. As the binder resin, any of resins conventionally used in toners and the like can be used. For example, as the resin for the meltable differential ink, polystyrene, styrene- (meth) acrylate copolymer, (meth) A) acrylate (co) polymer, styrene-butadiene copolymer, polyethylene, wax, epoxy resin, polyester resin and the like.

The recording powder ink is prepared by mixing the above-mentioned components in a molten state of the binder resin, pulverizing and classifying, and usually used as a powder having an average particle diameter of 5 to 30 μm. When a carrier is used, it is used by mixing with the classified powder.

In the present invention, the same information is recorded on the magnetic recording layer by using an ordinary magnetic recording device.
Using an electrophotographic apparatus such as an electronic copying machine or a laser printer, double recording is performed by copying or printing at a predetermined location on the substrate using the dry developer containing the infrared absorbing dye. By duplicating recording of the same information in this way, not only the accuracy of the recording of the information is maintained, but also the recording by the dry developer cannot be falsified. By checking the records, it is possible to easily confirm the presence or absence of tampering. It can be read by using an infrared reading device.

In the present invention, the arrangement of the magnetic recording layer on the substrate and the information recording portion by the dry developer containing an infrared absorbing dye is not particularly limited. For example, the developer may be provided on the magnetic recording layer. A magnetic recording layer is provided on one surface of the substrate, and a recording portion of the developer is provided on the other surface, and a magnetic recording layer is provided on a different portion on the same surface of the substrate. And the recording portion are separately provided.

As described above, the image information recorded by the dry developer is indistinguishable or difficult to determine with the naked eye. Colored surface (hiding layer) applied to hide or decept the naked eye, that is, in the visible light region
Can be confirmed by reading with an infrared reader, an infrared photograph or the like. Information recorded using the magnetic recording device can be confirmed by a magnetic reader.

For example, in an infrared reader, first, 700
A near-infrared light emitting diode that emits near-infrared light of up to 900 nm is used, and these infrared rays are radiated to the corresponding portion or the entire surface of the base body as it is or in a form in which the sensitivity of light reception is increased by modulation. By the irradiation of infrared rays, the substrate, for example,
In areas where image information is recorded on a paper or card with a developer containing an infrared-absorbing dye, the irradiated infrared light is absorbed and little or no light reaches the infrared light receiving sensor. Is very slight, and the generation of an electric signal in the light receiving sensor is zero or extremely weak. On the other hand, in a colored portion (concealing layer portion) where no image information is recorded, infrared light is reflected and received by the light receiving sensor, and is converted into an electric signal indicating the reflection. These electric signals are connected to various recognition methods such as a display using a cathode ray tube and recognized as clear information.

When recording information according to the present invention, it is necessary to record exactly the same information twice as described above in order to maintain the accuracy of information recording. In order to check forgery of a ticket or a card, it is not always necessary to make all recorded information the same. In the latter case, at least the core information needs to be duplicated according to the ticket or card used. For example, in a regular ticket, a boarding section, a boarding period, a user name, and a regular ticket No. may be items to be recorded twice.

[0026]

The present invention will be specifically described below with reference to examples. In the following description, parts and% are based on weight unless otherwise specified.

Example 1 2 parts of a carbon black pigment as an infrared absorbing dye,
Melt and knead 95 parts of a styrene-methacrylate copolymer resin and 3 parts of a chromium complex salt negative charge control agent according to a conventional method.
After crushing, finely pulverize with a jet mill, and further 5 to 30 μm
To obtain a black negative charge dry developer A-1 for electrophotography.

Separately, 3- (4 ') as an infrared reflective dye
-Aminophenylimino) -1-oxo-4,5,6
7-Tetrachloroisoindoline is diazotized to give 2-hydroxy-α-benzocarbazole-3-carbo- (2
5 parts of an azomethine azo pigment obtained by performing a coupling reaction with 7-methyl-4'-methoxy) anilide, 92 parts of a styrene-methacrylate copolymer resin, and 3 parts of a chromium complex-based negative charge control agent are kneaded and ground in the same manner as described above. After classification, the mixture was mixed with a fluidizing agent and magnetic iron powder to obtain a black negatively charged dry developer R-1 for electrophotography.

Solid printing is performed with a laser printer in which the above-described black developer R-1 is filled in white paper, and the reflectance of the visible portion to the near-infrared portion of the solid printed portion is measured with a Hitachi Model P330 type recording spectrophotometer. did. On the other hand, solid printing was carried out on a white paper in the same manner as described above using the above-described black developer A-1, and then a black developer R-1 was overprinted thereon. The reflectance of the solid printing portion was measured in the same manner as described above. Table 1 shows the results.

As shown in Table 1, the solid printed portion of the black developer R-1 shows almost no reflection in the ultraviolet and visible portions, and shows a very high reflection in the near infrared portion. The black-printed developer R-1 was superimposed on the black developer A-1 and the solid-printed portion showed no reflection at all in the ultraviolet, visible, and near-infrared regions. Agent A-1 absorbs carbon black and shows black. The difference between the two reflectances is very large, and this difference makes it possible for the infrared reader to read the recorded information with the developer R-1.

[0031]

[Table 1]

The entire surface of the polycarbonate resin sheet cut to an appropriate size was white-coated to a thickness of about 10 μm, 5.6 parts of γ-iron oxide, and a vinyl chloride-vinyl acetate copolymer. 4 parts, and diisobutyl ketone, methyl isobutyl ketone and Solvesso 100 as a solvent
A coating solution dispersed with 72 parts of a mixed solvent consisting of 15
Coating was performed with a thickness of about 10 μm and a width of 10 mm, and after orientation, the coating was dried to form a magnetic recording layer. The sheet was cut into a card having a width of 85 mm and a length of 57 mm including the magnetic recording layer.

An electrophotographic copying machine or laser printer for negative charge development, in which image information such as letters, numbers, symbols, and patterns is loaded at a position 20 mm away from the magnetic recording layer of the card with the black developer A-1. And recorded by copying or printing. Next, black copying or printing was performed on the entire substrate with the above-mentioned copying machine or printer loaded with the above-mentioned black developer R-1. Finally, exactly the same information as above was input to the magnetic recording layer of this card using a magnetic recording device.

When the magnetic recording of the above card was performed by a magnetic reading device, the card could be read sufficiently. However, the image information recorded with the black developer A-1 is
Although it was concealed by the developer R-1 and could not be recognized by the naked eye, clear reading was possible by using an infrared reader. As a result of collating the reading of both records, it was confirmed that the same information was recorded, as a matter of course.

The infrared reader is an infrared light emitting diode (for example, PTLN105 manufactured by Tokyo Shibaura Seisakusho).
To generate an infrared ray, modulate it to increase the luminous intensity, receive the reflected infrared ray with a light receiving sensor (for example, PTPS703 manufactured by Tokyo Shibaura Seisakusho), convert the presence or absence of reflection and the degree of reflection into an electric signal, The one that was able to recognize the information was used.

[0036]

As described above, according to the recording method of the present invention, the same information is recorded on the magnetic recording layer on the base of a ticket or a card, and at the same time, the information is duplicated by using a dry developer containing an infrared absorbing dye. And furthermore, by concealing or deceiving the information recorded by the dry developer with the naked eye, the information cannot be identified with the naked eye but can be identified only by infrared rays.
Further, the information recorded by the dry developer cannot be falsified due to irreversibility. Therefore, even if the information recorded on the magnetic recording layer is damaged or changed, the information recorded by the dry developer remains, and it is easy to confirm the falsification of the magnetic recording or the forgery of the ticket or card by comparing the two recorded information. can do. By duplicating and recording the same information, the accuracy of information recording is maintained, and it is very useful as a method for recording image information that requires a high degree of confidentiality.

Claims (7)

[Claims] 1. A method of recording information on the same substrate of a ticket or a card by using a magnetic material and a material containing an infrared absorbing dye, respectively, wherein the same information is recorded on one side, and the other is a magnetic recording layer provided on the substrate. The other is recorded on a substrate by electrophotography or electrostatic printing using a dry developer containing an infrared-absorbing dye so that it is practically indistinguishable or difficult to recognize with the naked eye. A double recording method of information, characterized in that it is possible to confirm tampering or counterfeiting of a ticket or card by comparing both record information. 2. The method according to claim 1, wherein after the information is recorded on the substrate with the dry developer, at least a layer for concealing the information recording portion is formed. 3. The information recording apparatus according to claim 1, wherein a layer for concealing recorded information is formed in advance on at least a portion of the substrate on which information is recorded with the dry developer, and the information is recorded on the concealing layer with the dry developer. Information double recording method. 4. The information double recording method according to claim 1, wherein the infrared absorbing dye is a black pigment. 5. The information according to claim 2, wherein the concealing layer is formed by using a dry developer containing an azo pigment having a dark blue to black color tone under visible light as an infrared reflective dye. Double recording method. 6. The method according to claim 4, wherein the black pigment is a carbon black pigment. 7. An azo pigment as a coupling component,
The double recording method of information according to claim 4, wherein the azo pigment is an azo pigment using hydroxy-α-benzocarbazole-carboxylic acid amide or a derivative thereof.