JPH065369B2 - Information recording card and its usage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention records and uses various information such as a cash card, a credit card, a securities card, an identification card, a prepaid card, a pachinko payout number recording card, and the like. The present invention relates to an information recording card, and more particularly to a card capable of recording visible visual information as well as invisible magnetic information and a method of using the card.

[Prior Art] Magnetic recording cards, which are used by writing magnetic information on a magnetic recording layer formed on a card body, are widely used for various purposes. However, this magnetic information can be visually inspected. It is a property that cannot be done. Now, with respect to a card that does not require rewriting of information, or does not need to know the rewritten content even if rewriting is necessary, the above property does not cause much problem, and is rather preferable for confidentiality protection.

However, for cards that require rewriting and want to know the rewritten contents, such as prepaid cards and pachinko ball number recording cards, the above property becomes a big problem and the rewritten contents can be seen. A means to display is required.

Therefore, various conventional displays have been studied, and the following are known, for example.

(1) A method in which some numbers indicating the remaining frequency are printed on the edge of the card body and punch holes are formed in the edge according to the actual remaining frequency, as in the existing prepaid cards.

This punching method can be realized with a simple device,
There is an advantage that the cost of the card itself does not increase,
Since the punch hole only displays the approximate remaining frequency, there is a problem that the remaining frequency cannot be accurately known.

(2) Like a pachinko ball number recording card that has recently been marketed, a magnetic recording layer is provided along with a magnetic recording layer on the card body, and a number indicating the number of pachinko balls is magnetized on the magnetic adsorption layer. A method of displaying iron powder by adsorbing iron powder on the magnetized part.

This payout number recording card was developed in order to eliminate the cost increase due to the disposable use of the perforated tape that has been used in the information management system of the pachinko amusement park in the past. Therefore, it can be repeatedly used.

According to this iron powder adsorption method, there is an advantage that the recorded content of the number of balls thrown out can be clearly seen, but the performance of the magnetic adsorption layer deteriorates relatively quickly, and the display by the iron powder takes a long time. There was a problem that it would not last. Since both the magnetic recording layer and the magnetic adsorption layer use magnetism, if the card is inadvertently brought close to a magnet or the like, the magnetic recording layer and the magnetic adsorption layer will be erased at the same time. There was a drawback that no information was left.

(3) A reversible photosensitive temporary recording layer made of a photochromic compound is provided on the surface of the card body, and characters or the like are colored on the temporary recording layer by the patterned exposure of an exposure device,
A method in which this color development is continued for several seconds to several hours and then automatically erased (Japanese Utility Model Laid-Open No. 61-46658).

The method using the temporary recording layer is effective when the information display time is short. However, since the conventional photochromic compound and the light emitting method are used as they are, the color development life is at most 2 to 4 hours. For example, as with a prepaid card or a pachinko ball number recording card, information can be obtained over 1 to 10 days. If you want to continue to display, there is a problem that it can not be adopted at all. Also,
When the temporary recording layer after coloring is exposed to the sun or an ultraviolet ray generating source such as a strong fluorescent lamp, the part that has not been colored until then is also colored, and the difference in brightness from the already-colored characters etc. almost disappears,
The characters cannot be read. Therefore, in order to maintain the color development, it is necessary to pay attention to the preservation method. Further, there is a facility problem that a negative original image, a positive original image, a phosphor segment, and the like must be prepared in order to perform the pattern-like exposure by the exposure device.

An object of the present invention is to solve the above-mentioned problems, and by visually coloring the content of magnetic information written in the magnetic recording layer as visual information in the photochromic recording layer, it is possible to know it visually and accurately, and the card is careless. The visual information can be retained even when brought close to a magnet, etc., and it is possible to increase the coloring density of the visual information, extend the coloring life, and enhance the storage stability after coloring. It is an object of the present invention to provide a novel information recording card that enables a simple configuration of the information recording device using a printer or the like and a method of using the same.

[Means for Solving the Problem and Actions Thereof] In order to achieve the above object, the following means were taken in the present invention.

That is, the information recording card according to claim 1 is characterized in that a magnetic recording layer and a photochromic recording layer heat-modified at 90 to 150 ° C. are provided together on the card body.

In the method of using the information recording card according to claim 2, magnetic information is written by applying magnetism to the magnetic recording layer provided in the card body, and the content of the magnetic information is shown in the photochromic recording layer provided in the card body. A step of irradiating at least a heat-printed portion of the photochromic recording layer with an ultraviolet ray or a short-wavelength visible ray (hereinafter referred to as an ultraviolet ray) after the visual information is heat-printed to develop the visual information.
And a step of applying magnetism to the magnetic recording layer to erase the magnetic recording information and heating the photochromic recording layer to erase the visual information.

Further, in the method of using the information recording card according to claim 3, magnetic information is written by applying magnetism to the magnetic recording layer provided in the card body, and the content of the magnetic information is shown in the photochromic recording layer provided in the card body. After the visual information is heat-printed, a step of irradiating at least the heat-printed portion of the photochromic recording layer with ultraviolet rays or the like to develop the visual information, and imparting magnetism to the magnetic recording layer to convert the magnetic information into new magnetic information. Along with rewriting, after heat-printing a new visual information indicating the content of the new magnetic information and a mark to cover the visual information on the photochromic recording layer, at least the heat-printed portion of the photochromic recording layer is irradiated with an ultraviolet ray or the like. A step of coloring the mark and new visual information, and applying magnetism to the magnetic recording layer to erase the new magnetic information It is an gist further comprising the step of decoloring and said mark and the new visual information by heating the photochromic recording layer.

Explaining the above-mentioned means in more detail, first, as the card body, plastic, metal, glass, ceramics, paper, those formed into a card shape by a composite material thereof, and the like can be mentioned. , Polyester, polyamide, polyimide, polycarbonate, polymethylmethacrylate, vinyl chloride, polyacetal, polyethylene terephthalate, cellulose acetate and the like.

As the magnetic recording layer, known ones can be adopted. For example, magnetic powder of iron oxide, chromium oxide, iron-cobalt-nickel alloy or the like is applied to the surface of the card body together with a binder, or the magnetic substance is vapor-deposited. And a magnetic recording layer such as an existing magnetic tape attached to the surface of the card body or sandwiched inside. This magnetic recording layer is generally provided on part or all of one side of the card body, but it may be provided on part or all of both sides. Further, it is preferable that the surface of the magnetic recording layer is provided with a protective coating layer.

The photochromic recording layer is not limited to a specific component and a production method before the modification treatment, but the most commonly used is to dissolve or finely disperse a photochromic substance in a solvent together with a binder, and to prepare a solution or fine dispersion of the photochromic substance. Is formed by applying and drying on the card body.
This photochromic recording layer is also generally provided on a part or all of one side of the card body, but may be provided on part or all of both sides. Further, this photochromic recording layer is generally provided at a position different from the magnetic recording layer, but it can also be provided on the magnetic recording layer.

Examples of the photochromic substance include 1,3,3-trimethylindolino-6′-nitrobenzopyrrirospirane, 1,3,3-trimethylindolino-8′-methoxybenzopyrrirospirane and 1,3,3- Examples thereof include trimethylindolino-benzopyrrolospirane, 6'-hydroxyspirobenzopyran, 2- (2,4-dinitrobenzyl) pyridine and the like. The proportion of the photochromic substance used is appropriately 2 to 50% by weight, preferably 5 to 20% by weight, based on the binder. If it is less than 2% by weight, the color developability and the number of times that it can be used repeatedly are poor, and if it exceeds 50% by weight, not only the characters described below but also the surrounding area are strongly colored, and the difference in lightness between the two becomes small. This is because it becomes difficult to read characters and the like, and the cost increases.

As the binder, a polymer having good light transmittance is suitable, and more preferable is a polymer which is unlikely to be melted by the heat at the time of heating printing, which is a feature of the present invention, and is unlikely to be depressed by a pressing force. For example, polyester, polyamide, urethane, polymethylmethacrylate, polystyrene, polyethylene, polypropylene, polyacrylonitrile,
Examples thereof include polymethyl methacrylate, polyvinyl acetate, polyvinyl butyral, polyvinyl chloride, polyvinylidene chloride, cellulose acetate, nitrocellulose, phenol, epoxy, and copolymers thereof. Among these polymers, polyester copolymers are particularly suitable in that they have good light transmittance and high melting points,
A polyamide copolymer is particularly suitable in terms of good light transmittance and hardness.

Examples of the solvent include methyl ethyl ketone, cyclohexanone, tetrahydrofuran, methyl alcohol, ethyl alcohol, isopropyl alcohol, ethyl ether, dioxane, ethyl acetate, n-butyl acetate, toluene, xylene, ethylbenzene, acetone, n-hexane, cyclohexane, chloroform, methyl. Cellulsolve, dimethylsulfoxide, acetonitrile, dimethylformamide, dimethylsulfoxide and the like can be mentioned.

The photochromic substance-binder-a method of preparing a solution or fine dispersion of a solvent, a method of dissolving a photochromic substance and a binder in a common solvent in which both can be dissolved, or while dissolving the photochromic substance in a dedicated solvent A method in which the binder is dissolved in another dedicated solvent, the both are mixed and finely dispersed in each other, and the like can be mentioned.

Examples of the method of applying the solution or fine dispersion to the card body include brushing, rollers, spraying, dipping, spin coating, and flow coating.

Furthermore, the photochromic recording layer must be modified by heating at 90 to 150 ° C. before recording information for the first time. As described later, this is to improve the color density at the time of recording information, the color development life, and the color developability of the number of times of repeated use.

The heating temperature varies depending on the type of photochromic recording layer, but in most types, the range of 90 to 150 ° C. is suitable. When the temperature is lower than 90 ° C, the coloring property described later is hardly improved as compared with the case where it is not heated, and when the temperature exceeds 150 ° C, the photochromic substance is oxidized and decomposed and deteriorated, or the requirement for the melting point of the binder becomes strict. is there. For example, in the recording layer using a spiropyran compound and a polyester copolymer, 100 to 13
0 ° C is preferred.

The heating time differs depending on the type of photochromic recording layer and the heating temperature. For example, in a recording layer using a spiropyran compound and a polyester copolymer, 60 to 180 seconds are suitable when the heating temperature is 100 ° C, and 10 to 60 seconds are suitable when the heating temperature is 130 ° C.

Further, as the heating means, a constant temperature bath, a hot air dryer, an infrared drying oven, etc. can be exemplified.

Now, this heat modification treatment has the effect of improving the color developability in various ways as follows.

(A) Change the hue when the photochromic recording layer develops color upon irradiation with ultraviolet rays.

For example, in a photochromic recording layer formed by using a solution of 1,3,3-trimethylindolino-6′-nitrobenzopyrrirospirane, a polyester copolymer and methyl ethyl ketone, the coloring hue upon irradiation with ultraviolet rays is The color that was red when the modification method was not performed becomes bluish purple when the modification method was used.

(B) The color density of the photochromic recording layer is increased.

For example, in the example given in (A) above, the color density upon irradiation with ultraviolet rays, etc. was low in the case where the modification method was not used, whereas in the case where the modification method was used, a visual sensory test was conducted. More than 50% thicker.

(C) Extends the coloring life of the photochromic recording layer.

For example, in the example given in (A) above, the color development life is extended by at least 20% or more under the same conditions after the modification method, as compared with the case where the modification method is not performed.

Although the details of the above-mentioned modification mechanism are unknown, it is considered that one of them is that the compatibility state between the photochromic substance and the binder is changed by heating, which affects the working relationship between the two.

Next, as a method of writing, rewriting and erasing magnetic information on the magnetic recording layer, a known method of bringing a magnetic head into contact with or close to the magnetic recording layer and moving a card or the magnetic head relatively is mentioned. You can

The method of writing visual information on the photochromic recording layer is performed through the following steps.

First, visual information composed of characters or a mark to be overlaid on the photochromic recording layer is printed by heating (heating printing step).

This heating and printing step is not for developing the color of the photochromic recording layer by itself, but it is for making the characters and the like clearly appear by strongly coloring the heating and printing portion at the time of irradiation with ultraviolet rays, which will be described later. It's just like a sketch in the beginning.

Examples of the method of heat printing include a method of using a known thermal printer to directly perform heat printing on the photochromic recording layer with the thermal head, or a method of scanning the photochromic recording layer with a heat beam.

It is suitable that the temperature of the heat printing is 90 to 150 ° C, preferably around 105 ° C. If the temperature is less than 90 ° C, the degree of improvement in color developability described below is less than that in the case where heat printing is not performed.
This is because when the temperature exceeds 150 ° C., the requirement for the melting point of the binder becomes strict.

This heating and printing step has the effect of multi-facetedly improving the color developability of characters and the like as follows.

(a) The color density of the heat-printed portion when the photochromic recording layer is colored by irradiation with ultraviolet rays or the like is increased so that characters and the like can be clearly highlighted without using a negative original image as in the past.

For example, in a photochromic recording layer formed by using a solution of 1,3,3-trimethylindolino-6'-nitrobenzopyrrilospirane, a polyester copolymer and methyl ethyl ketone, the heat-printed portion of the heat-printed portion when irradiated with ultraviolet rays or the like is used. The color-developed density is three times or more darker than that of the portion not printed by heating by a visual sensory test.

(b) The color development life of the heat-printed portion of the photochromic recording layer is extended.

For example, in the example given in (a) above, the color development life of the heat-printed portion after irradiation with ultraviolet rays or the like is 50 times or more longer under the same conditions as compared with the non-heat-printed portion.

(c) To improve the storage stability of the photochromic recording layer.

For example, in the example given in (a) above, when the photochromic recording layer after color development is further exposed to a source of ultraviolet rays such as the sun or a strong fluorescent lamp, the color not printed by heating becomes dark, Since the color of the part becomes darker,
The difference in brightness between the two is maintained as it is, and characters and the like can be easily read. Therefore, it is not necessary to pay attention to the preservation method of the photochromic recording layer as in the conventional case.

The details of the mechanism for improving the color developability are unknown, but it is considered that one of them is that the compatibility state between the photochromic substance and the binder is changed by heating, which affects the working relationship between the two.

Next, at least a heat-printed portion of the photochromic recording layer is irradiated with ultraviolet rays or the like to color the visual information (coloring step).

Examples of the irradiation light source include a constant light source such as the sun and a mercury lamp, and a pulse light source such as a flash and a xenon discharge tube strobe.

As the irradiation method, it is general to irradiate the surface over the heat-printed portion and its surroundings to darkly color the characters and the like and lightly color the surroundings as described above, but adjust the light beam to the characters and the like. It is also possible to irradiate only the heat-printed portion by scanning by scanning so that only the characters and the like are deeply colored.

The irradiation light intensity and the irradiation time are preferably such that the characters and the like on the heat-printed portion are sufficiently darkly colored, while the surrounding color is not so darkly colored. The specific value varies depending on the type of photochromic recording layer and the irradiation light source, and will be exemplified in Examples described later.

Subsequently, in order to erase the visual information recorded in the photochromic recording layer, the visual information may be erased by heating the photochromic recording layer.

The heating temperature is appropriately 50 to 150 ° C., preferably 6
It is 0 to 130 ° C. This is because if the temperature is lower than 50 ° C., the color cannot be erased or it takes too long to erase the color, and if the temperature exceeds 150 ° C., the photochromic dye tends to be oxidized and decomposed to deteriorate.

The heating time differs depending on the type of the photochromic recording layer. For example, a photochromic layer formed by using a solution of the above 1,3,3-trimethylindolino-6'-nitrobenzopyrrirospirane, a polyester copolymer and methyl ethyl ketone. In the recording layer, 60 ℃ in a warm water bath
If heated to 3 to 10 minutes, hot air dryer to 130
When heating to ℃, about 10 to 60 seconds is appropriate.

As the heating means, a constant temperature bath, a hot air dryer, an infrared drying furnace, a hot water bath, etc. can be exemplified. In particular, the use of a warm water bath has the advantage that oxidative deterioration of the photochromic substance can be prevented.

In the magnetic recording layer and the photochromic recording layer, magnetic information and visual information can be rewritten many times by repeating the above recording and erasing.

However, by repeating this, the color developability of the photochromic recording layer gradually decreases. The maximum number of times that the photochromic recording layer can be used repeatedly varies depending on the type of the photochromic recording layer, the coloring and decoloring conditions, the storage method, etc., but in the present invention, the coloring property of the photochromic recording layer is improved by the modification treatment and / or the heat printing step. However, since the characters and the like can be clearly read even after repeating a greater number of times than in the conventional example that does not go through these, the number of times that can be repeatedly used can be substantially increased.

Further, as in claim 2, when the visual information colored on the photochromic recording layer is covered with a mark and another new visual information is colored next to the mark, the photochromic recording layer can generate the mark and the visual information. You can rewrite a lot of visual information without erasing each visual information until it becomes full. Therefore, the actual usable number of times of the card is the product of the number of times of rewriting and the number of times of repeated use, which can be dramatically increased.

[Example] An example in which the present invention is embodied in a pachinko ball number recording card will be described below.

As shown in FIGS. 1 to 3, this pachinko ball number recording card 1 is based on a card body 2 made of polyester resin, and has a magnetic recording layer 3 formed by coating iron oxide with a binder on the entire back surface thereof. Formed, and further the magnetic recording layer 3
The protective coating layer 4 known in the above is formed by coating. Then, the photochromic recording layer 5 of each of the embodiments is applied and formed on the central portion of the surface of the card body 2, and a print column 6 for displaying the name of the card issuer or the like and advertisements is provided under the surface. ing.

(Example 1) 1,3,3-Trimethylindolino-6'-nitrobenzopyrrilospirane was dissolved in methyl ethyl ketone, and a polyester copolymer (manufactured by Toyobo Co., Ltd .: Byron-200) was dissolved in methyl ethyl ketone. , And both were mixed to prepare a recording layer forming solution. 1,3,3-Trimethylindolino to polyester copolymer
The proportion of 6'-nitrobenzopyrrilospirane used is 5% by weight.

As shown in FIG. 1, this recording layer forming solution is applied to the surface of the card body 2 by brushing and naturally dried to form a photochromic recording layer 5 having a thickness of about 10 μm. Was almost completely volatilized.
The background color of the photochromic recording layer 5 was pale yellow.

Next, as shown in FIG. 4, the card body 2 is put in a hot air dryer 7 and the photochromic recording layer 5 is heated at 100 ° C. for 6 hours.
Heated for 0 seconds and modified, pachinko ball number record card 1
Was completed.

Next, as shown in FIG. 5, the above-mentioned pachinko ball number recording card 1 is inserted into a known magnetic recording device, and its magnetic head 8 is inserted.
The magnetic information is recorded on the magnetic recording layer 3 (here, January 1
The contents of the day and the number of coins released (500) were recorded in the form of the magnetic stripe 9 shown in FIG. Of course, this magnetic stripe 9
Is not visible unless a magnetic contrast agent is used.

Next, the pachinko ball number recording card 1 shown in FIG. 6 is set in a commercially available general thermal printer,
Visual information corresponding to the magnetic information was directly printed on the photochromic recording layer 5 by means of the thermal head 10 set at about 100 ° C. in the form of characters 11 (here, "1/1 ball 500 characters"). The heat-printed portion was physically slightly depressed due to the pressing force of the thermal head 10, but color development and discoloration were extremely slight.

Next, as shown in FIG. 7, a commercially available EP-ROM is formed on the heat-printed portion of the photochromic recording layer 5 and its peripheral portion.
The eraser 12 was used to irradiate the surface with ultraviolet rays or the like. This EP
The ROM eraser 12 emits ultraviolet rays as intermittent pulses. The pulse emission interval is about 0.2 seconds, the irradiation time is about 2 seconds, and the ultraviolet light quantity (wavelength 2537Å) is 1.2.
It was W · sec / cm ² . Then, the characters 11 and the like on the heat-printed portion of the photochromic layer 5 developed a deep bluish purple color, and the surrounding portion 13 thereof developed a light bluish purple color. The difference in brightness between the two was high, and the letters 11 and the like were clear and could be easily read.

This color-developed pachinko ball number recording card 1 was stored by the following two methods.

I: When stored at room temperature in a dark place without being exposed to other light rays, the color of the peripheral portion 13 was almost completely erased in about 10 hours, but the color of the characters 11 was erased very slowly. Even after 960 hours, it was still readable.

II; After coloring, applying sunlight for 3 minutes, the surrounding area 13
The color of the letters changed to a stronger bluish color and became darker, but the color of the letters 11 etc. did not change and became darker, so the difference in lightness between the two was almost maintained, and the letters 11 etc. It was easy to read. After that, when it was stored at room temperature in a dark place, the color of the peripheral portion 13 was 960.
Although it remained slightly after a lapse of time or more, the color of the character 11 or the like was still clear even after 960 hours or more and could be easily read.

Then, as shown in FIG. 10, the pachinko ball number recording card 1 was immersed in a hot water bath 16 at 60 ° C. for about 5 minutes, and the color development of the marks 14 and characters 15 of the photochromic recording layer 5 was erased cleanly. Colored.

After that, when the heating printing step, the coloring step and the erasing step were repeated, the background color of the photochromic recording layer 5 gradually turned yellow and the coloring density and the coloring life were shortened. When the storage method II was used, it could be used repeatedly 10 times.

The test results are shown in Table 1.

Separately from the sample subjected to the above-mentioned repetition, the pachinko ball number recording card 1 1 day after the first color development was inserted into the magnetic recording device again as shown in FIG. New magnetic information (here January 2
It was rewritten to the content of the number of days and 800 balls.

Further, the pachinko ball number recording card 1 is set again in the thermal printer, and as shown in FIG. 8, the thermal head 10 causes the photochromic recording layer 5 to have a rectangular mark 14 for covering the magnetic information and a new magnetic information. 15 and the like as new visual information corresponding to
2 characters 800 ") was directly heated and printed.

Next, as shown in FIG. 9, the heat-printed portion of the photochromic recording layer 5 and its peripheral portion were subjected to surface irradiation with ultraviolet rays or the like using the EP-ROM eraser 12, and the mark 14 was dark blue. It is colored purple and the letters 11 are hidden.
The characters 15 and the like also developed a dark blue-violet color, and the peripheral portion 13 developed a light blue-violet color.

The above-mentioned rewriting of information is carried out daily until the photochromic recording layer 5 is filled with the marks 14 and characters 15
I went each time.

Then, as shown in FIG. 10, the pachinko ball number recording card 1 was immersed in a hot water bath 16 at 60 ° C. for about 5 minutes, and the color development of the marks 14 and characters 15 of the photochromic recording layer 5 was erased cleanly. Colored.

(Example 2) Example 3 is different from Example 1 only in the type of the photochromic recording layer and the use of the hot air dryer in the erasing step.
The remaining modification process, color development process, storage process and decolorization process are the same as in Example 1.

In this example, 1,3,3-trimethylindolino-6 '
-Nitrobenzopyrrilospirane was dissolved in methyl ethyl ketone, a polyamide copolymer (manufactured by BASF: trade name Ultramid 1C) was dissolved in ethyl alcohol, and both were mixed to prepare a fine dispersion for recording layer formation. 1,3,3-Trimethylindolino for polyamide copolymer
The proportion of 6'-nitrobenzopyrrilospirane used is 5% by weight. The recording layer-forming microdispersion is applied to the surface of the card body by a brush, and naturally dried to form a photochromic recording layer having a thickness of about 10 μm, which is left for 2 days to completely vaporize methyl ethyl ketone and ethyl alcohol. It was

The test results of this Example 2 are also shown in Table 1.

(Example 3) This Example 3 is different from Example 1 only in the type of the photochromic recording layer and the irradiation time of ultraviolet rays in the color forming step, and the other modifying, coloring, storing and erasing steps are the same. The same procedure as in Example 1 was performed.

In this example, 1,3,3-trimethylindolino-8 '
-Methoxybenzopyrrillospirane was dissolved in methyl ethyl ketone, a polyester copolymer (manufactured by Toyobo Co., Ltd .: trade name Byron-200) was dissolved in methyl ethyl ketone, and both were mixed to prepare a recording layer forming solution. The ratio of 1,3,3-trimethylindolino-8'-methosybenzopyrrilospirane used to the polyester copolymer was 20.
% By weight. This recording layer forming solution was applied to the surface of the card body with a brush, and naturally dried to form a photochromic recording layer having a thickness of about 10 μm. Methyl ethyl ketone was allowed to evaporate almost completely for another 2 days.

Further, since this photochromic recording layer has a lower UV sensitivity than that of Example 1, the irradiation time of UV in the coloring step was set to about 5 seconds.

The test results of Example 3 are also shown in Table 1.

(Comparative Examples 1 to 3) In Comparative Examples 1, 2 and 3, the same recording method as in Examples 1, 2 and 3 was performed without performing the modification process and the heat printing process on the photochromic recording layer. The information is recorded directly by. That is, to the unrecorded and unmodified photochromic recording layer, ultraviolet rays are radiated through a negative original image in which characters are transparently extracted from the EP-ROM eraser and other portions are colored so as not to pass ultraviolet rays, The letters etc. were colored. The subsequent storage step and decoloring step are the same as in Example 1 and the like.

The test results of Comparative Examples 1 to 3 are also shown in Table 1. As is clear from the table, in each of the examples, the color density is higher than that of the corresponding comparative example, and the color development life is long, so that the readable time of characters and the like is long, and the severe storage as in the preservation method II is performed. It turns out that they are strong against the law.

The present invention is not limited to the pachinko ball payout number recording card, and is embodied in a cash card, a credit card, a securities card, an identification card, a prepaid card, and an information recording card for recording and using various kinds of information. be able to.

[Effects of the Invention] Since the present invention is configured as described above, it has the following excellent effects.

According to the information recording card of claim 1, the contents of the magnetic information written in the magnetic recording layer can be visually recognized accurately by causing the photochromic recording layer to develop color as visual information, and the card can be inadvertently careless. The visual information can be left even when brought close to a magnet or the like, and further, the coloring density of the visual information can be increased or the coloring life can be extended.

According to the method of using the information recording card of claim 2, the color density of the visual information can be further increased, the color development life can be extended, and the storability after color development can be improved, and the existing thermal printer or the like can be easily used. It is possible to configure a visual information recording device.

According to the method of using the information recording card of claim 3, in addition to the above effect, a large number of visual information can be rewritten without erasing the visual information one by one until the photochromic recording layer is filled with marks and visual information. Therefore, the number of times the card can be actually used can be dramatically increased.

[Brief description of drawings]

FIG. 1 is a front view showing a pachinko ball payout number recording card of an embodiment embodying the present invention, FIG. 2 is a rear view of the same, FIG. 3 is a sectional view of the same, and FIG. 4 is a modification of the same embodiment. 5 is a front view of the magnetic recording process, FIG. 6 is a front view of the heating printing process, FIG. 7 is a perspective view of the coloring process, and FIG. 8 is a heating printing process at the time of rewriting. Front view of the
FIG. 9 is a perspective view of the same coloring step, and FIG. 10 is a perspective view of the same erasing step. 1 ... Pachinko ball number recording card, 2 ... Card body, 3 ... Magnetic recording layer, 5 ... Photochromic recording layer, 7 ... Hot air dryer, 10 ... Thermal head, 11, 15 ... Letters, etc. 12 ... EP-ROM erase Vessel, 13 ... Surrounding part, 14 ... Mark.

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location G03C 1/00 531 8910-2H 1/685 8910-2H G06K 19/08

Claims (3)

[Claims] 1. A magnetic recording layer and 90 to 150 ° C. on the card body.
An information recording card, which is provided with a photochromic recording layer which has been heat-modified by the method described above. 2. A magnetic recording layer provided on a card body is magnetized to write magnetic information, and visual information showing the contents of the magnetic information is heated and printed on a photochromic recording layer provided on the card body. A step of irradiating at least a heat-printed portion of the photochromic recording layer with ultraviolet rays or short-wavelength visible light to develop the visual information, and applying magnetism to the magnetic recording layer to erase the magnetic information, and the photochromic recording layer is formed. A method of using an information recording card, comprising the step of heating to erase the visual information. 3. A magnetic recording layer provided on a card body is magnetized to write magnetic information, and visual information showing the contents of the magnetic information is heated and printed on a photochromic recording layer provided on the card body. A step of irradiating at least a heat-printed portion of the photochromic recording layer with ultraviolet rays or short-wavelength visible light to develop the visual information, and applying magnetism to the magnetic recording layer to rewrite the magnetic information to new magnetic information, and the photochromic After heat-printing a mark to cover the visual information on the recording layer and new visual information indicating the contents of the new magnetic information, at least the heat-printed portion of the photochromic recording layer is irradiated with ultraviolet rays or short-wavelength visible light to mark the mark. And a step of coloring the new visual information, and erasing the new magnetic information by applying magnetism to the magnetic recording layer. How to use the information recording card and a step of heating said photochromic recording layer decolored and said mark and the new visual information.