JPH0655882A - Discriminating method for genuineness of card and the card - Google Patents

Abstract

PURPOSE:To make it possible for anyone to readily discriminate the genuineness of a card without the need of a professional by coating a base substance, which constitutes a card, with a color coupler and using a pigment, which is adapted for reacting on the color coupler for color development, as ink for use in a stamp so that the genuineness of a card is discriminated on the basis of a color change of the base substance at that portion which is stamped by the stamp. CONSTITUTION:A base substance which constitutes a card 1 adapted for stamping by a stamp 5 is coated with a color coupler (for example, bisphenol A), and a pigment (for example, 3-di-butylamino-6-methyl-7-anilinofluoran) adapted for reacting on the color coupler for color development is used as ink for use in the stamp 5. The genuineness of a card 1 is discriminated on the basis of a color change of the base substance at a portion 3 which is stamped by the stamp 5. As a result, it is possible for anyone to readily discriminate the genuineness of a card without the need of a professional.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for determining authenticity of cards such as gift certificates, other cash certificates, food tickets, passports (for departure and entry), employee ID cards, entrance tickets, tickets (designated tickets) and the like. Regarding cards used in.

[0002]

[Prior Art] Gift certificate, other cash certificate, meal ticket, passport (for departure, entry), employee ID card, admission ticket, ticket (designated ticket)
In such cards, the date, time, country name, store name, address, name, etc. are printed by a stamp or written by a writing instrument. Then, even if the card is forged, the contents such as date and time are surely printed and written on the card by a stamp or a writing instrument.

[0003]

On the other hand, when these cards are forged, it is difficult for an expert to determine the authenticity of the card, and the discrimination is not made efficiently. The present invention was made by paying attention to a card using the stamp or writing instrument as described above, and an object of the present invention is that no expert is required and anyone can easily discriminate the authenticity of the card. It is to provide a discrimination method and a card used for this method.

[0004]

In order to achieve the above object, the first invention is a method for discriminating the authenticity of a card on which a stamp is to be applied. The ink used is a dye that reacts with the color former to develop a color, and the authenticity of the card is determined by the change in the color of the substrate at the stamped portion.

A second aspect of the present invention is a method of authenticating a card in which predetermined items are written on a writing instrument, in which a color forming agent is applied to a base material of the card, and ink used for the writing instrument is added. It is characterized in that the authenticity of the card is discriminated by using a coloring matter which reacts with the color former and develops a color based on a change in the color of the substrate in a portion where a predetermined item is written on the writing instrument.

A third aspect of the present invention is a card used in the above-mentioned card authenticity determination method, characterized in that a color-developing agent for coloring a specific dye is applied.

Prescribed matters are printed or written on the card with a stamp or a writing instrument. Then, when the card is not a counterfeit product, a predetermined item is colored. When the card is a counterfeit product, the above-mentioned predetermined items are not colored. Therefore, the authenticity of the card can be easily determined by visually recognizing whether or not a predetermined item is colored.

Inks that do not develop color without the use of a color former are usually colorless or have a color completely different from that after color development. Since these inks develop color by reacting with a color former, they do not react with those without a color former. As a combination of the coloring matter and the color forming agent that compose such an ink, there are a leuco dye and an acid developer. For example,
Fluoran-based dyes and phenolic compounds, fluoran-based dyes and inorganic solid acids, fluoran-based dyes and acidic substances, phenothiazine-based dyes and phenolic compounds, triphenylmethanephthalide-based dyes and phenolic compounds and other leuco dyes and acidic developers Combinations can be mentioned.

Specifically, the pigments that make up the ink are
Dibutylamino-6-methyl-7-anilinofluorane was used, and bisphenol A was used as a coloring agent to be coated on the card.
When used, the dye develops from colorless to black by the reaction with the color former. When Crystal Violet Lactone (C.V.L.) is used as the dye constituting the ink and bisphenol A is used as the color-developing agent applied to the card,
The dye develops from colorless to blue by the reaction with the color former.

The ink used in the present invention is prepared by adding the above dye to an appropriate dye dissolving agent. Examples of such dye dissolving agent include ketones, esters, aromatic hydrocarbons, halogen-based dyes. Hydrocarbon, alkylnaphthalene,
A diallyl alkane or the like is used. Such an ink is preferably 1 to 1 with respect to 100 parts by weight of the dye dissolving agent.
It contains 0 part by weight of dye. Further, the ink may contain other additives in addition to the pigment, and as such additives, a thickener (oil, plasticizer, resin, etc.) and the like are used.

As a method of coating the above-mentioned color former on a card, a color former solution is prepared by dissolving the color former in an appropriate solvent, and the color former solution is applied to the card or sprayed. A method of immersing the card in the color former solution can be exemplified. At this time, as the solvent used for the color developer solution,
Water, ketones, esters, aromatic hydrocarbons, halogenated hydrocarbons, etc. are used. Such a color former solution is
The color former is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the solvent. Further, the color former solution may contain other additives in addition to the dye, and as such additives, binders such as resins and preservability improvers are used.

[0012]

EXAMPLE An example in which the present invention is applied to an amusement park free pass ticket will be described below. FIG. 1A shows a front view of a free pass ticket according to the embodiment. 1 is a free pass ticket,
The free pass ticket 1 is composed of a paper base, and a color former is applied to the base. Phenolic compounds as color formers,
Inorganic solid acids and other acidic developers are used.
This color developing agent is methyl ethyl ketone (ME
It is dissolved in K) to prepare a color former solution (color former content 2% by weight), and the color former solution is applied to predetermined portions of the substrate for coating. A frame 3 for printing the entrance date is drawn on the base body, and the free pass ticket 1 with the entrance date printed in the frame 3 is valid and all vehicles can be freely boarded on that day. .

The entry date in the frame 3 is printed by a stamp at the entrance of the amusement park. FIG. 2 shows a stamp 5 and a stamp stand 7 provided at the entrance of the amusement park. Stamp stand 7
The ink impregnated in the ink contains a dye that does not develop color unless a color former is used, and the ink develops color only when it reacts with the color former coated on the substrate. In this embodiment,
As the ink, a solution containing 2.0% by weight of 3-dibutylamino-6-methyl-7-anilinofluorane as a dye and 98.0% by weight of diallyl alkane as a dye dissolving agent is used.

Therefore, when the stamp 5 is stamped on the free pass ticket 1 coated with the coloring agent, the entrance date is colored as shown in FIG. 1 (B). Further, even if the stamp 5 is stamped on the free pass ticket 1 which is forged and is not coated with the color-developing agent, the color does not develop on the day of admission, as shown in FIG. 1C.

According to this embodiment, when the stamp 5 is pressed at the entrance of the amusement park or at the entrances of various vehicles in the amusement park, the attendant visually recognizes whether or not the entrance date is colored. Thus, the authenticity of the free pass ticket 1 can be easily determined.

Table 1 shows a free pass ticket 1 according to this embodiment,
The result of checking a forged product with a free pass ticket having a watermark pattern is shown.

[0017]

[Table 1]

As is clear from Table 1, it takes time to determine a free pass ticket having a watermark pattern, and
If it was a little dirty, there was a drawback that it would be difficult to distinguish. On the other hand, with the free pass ticket 1 according to the present embodiment, the determination can be made in a short time, and the authenticity can be easily and surely determined regardless of whether it is dirty or not.

The card to which the present invention is applied is not limited to the embodiment, and may be other cards such as gift certificates, other cash vouchers, meal tickets, passports, employee ID cards, entrance tickets, tickets (designated tickets), etc. Also applies.

[0020]

As described above, according to the present invention, a color forming agent is applied to a substrate constituting a card, and a dye that reacts with the color forming agent to form a color in an ink used for a stamp or a writing instrument, An expert is required because the authenticity of the card is determined by the change in the color of the base of the stamped part or the change in the color of the base of the part on which a prescribed item is written with a writing instrument. Without it, anyone can easily determine the authenticity of the card.

[Brief description of drawings]

FIG. 1 (A) is a front view of a free pass ticket to which the present invention is applied, FIG. 1 (B) is a front view of a free pass ticket when a stamp is stamped, and FIG. It is a front view when a stamp is stamped on a forged free pass ticket on which the agent is not applied.

FIG. 2 is a perspective view of a stamp and a stamp base to which the present invention is applied.

[Explanation of symbols]

 1 Free pass ticket 3 Frame 5 Stamp 7 Stamp stand

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display location B41M 5/124 5/155 B42D 15/00 351 A 8604-2C C09D 11/02 7415-4J (72 ) Inventor Hideki Nagao, 5-4-14 Minejima, Nishiyodogawa-ku, Osaka-shi, Osaka Prefecture Fujikopian Co., Ltd. (72) Yoshiaki Shiono, 5-4-14, Minejima, Nishiyodogawa-ku, Osaka-shi, Osaka Prefecture

Claims (3)

[Claims] 1. A method for determining the authenticity of a card to be stamped, wherein a color-forming agent is applied to a substrate constituting the card, and a dye that reacts with the color-forming agent to form a color is used in the ink used for the stamp. The authenticity determination method for a card, characterized in that the authenticity of the card is determined by the change in the color of the base of the stamped portion. 2. A method for discriminating between authenticity of a card in which predetermined items are written with a writing instrument, wherein a color-forming agent is applied to a base material forming the card, and the ink used in the writing instrument reacts with the color-forming agent. An authenticity determination method for a card, characterized in that the authenticity of the card is determined based on a change in the color of the substrate in a portion where a predetermined item is written with a writing instrument, using a coloring dye. 3. A card characterized by being coated with a color-developing agent for coloring a specific dye.