JPS5944616B2 - Method for manufacturing colored photo cards - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing colored photo cards, such as identification cards or credit cards, using photo development.

Conventional developing methods for photographically developing a colored image on a specific card substrate include the following methods, and each of them will be explained individually below.

(a) A method in which a diazo compound and a corresponding coupler are coated on a substrate in advance, exposed to active light through a photographic original plate, and developed in an alkaline aqueous solution or an ammonia gas stream to obtain a colored photographic image. Are known. However, since this method is limited in combination with couplers, only a certain number of colors, such as blue, red, and brown, can be obtained, and the resulting images are not durable. Furthermore, since this product uses a diazo compound, unexposed areas on the substrate are also lightly colored, making it difficult to obtain clear contrast.
A photosensitive solution containing a mixture of water-soluble colloidal substances such as gelatin, polyvinyl alcohol, and casein, and dichromate, iron salt, or diazo compound was applied to the substrate, and this was photocured with active light. There is a method to obtain colored photographic images by washing away the unexposed areas with water and dyeing the resulting photocured relief areas with dyes. Depending on the type of dye, the substrate itself may also be dyed, making it impossible to obtain clear photographic images.Furthermore, the photosensitive solution described above has no shelf life and is difficult to develop unless it is applied to the substrate immediately before exposure. There is a certain drawback.

←→ A method in which a colored image is provided on a substrate using a silver salt emulsion,
For example, if you use a type of silver salt emulsion film, such as the matrix film used in Kodatsu's die transfer method, where the unexposed areas can be washed away with warm water, it is possible to obtain any color development on the substrate. In this case, in order to create a colored image other than a black image, the developed and blackened film must be bleached with potassium ferrocyanide or the like and then colored with dye.

This industrial method was adopted because the potassium ferrocyanide used in this bleaching process becomes a source of pollution, such as polluting rivers, when the waste liquid turns into potassium ferrocyanide when exposed to ultraviolet light in sunlight. Doing so is uneconomical as it requires a large amount of expense to treat the waste liquid.

Furthermore, although black photographic images can be created without using any of the above-mentioned specific films, there is a drawback that the durability of the blackened image cannot be guaranteed unless a special process is carried out. Furthermore, commercially available natural color photographic film can also be considered as a material for obtaining colored images, but the process is complex and requires considerable process control, such as the density or color of the image changing with a slight change in processing temperature. There are drawbacks. (d)
Japanese Patent Publication No. 37-11558 discloses a photosensitive sheet structure in which a colored photographic image can be obtained by exposure and development after pigments are mixed in the photosensitive layer in advance.
In this case, the photosensitive composition is a diazo compound, and the base plastic sheet undergoes a chemical change with the diazo compound, and the chemically changed base sheet is exposed in the unexposed area after exposure and development. Unlike the material of the sheet, this will cause problems in adhesion work, etc.

The above is an explanation of the conventional method, and there are two to three other methods of obtaining a photographically colored image on a substrate, but all of them are limited to one or two specific colors, and moreover, The developing process required the use of organic solvents and chemicals that were harmful to the human body. The present invention was made in view of the above, and is made by combining a photosensitive resin that can be developed with a slightly alkaline aqueous solution, a pigment of 1 to 50 parts by weight per 100 parts of this photosensitive resin, and a sensitizer. , it has improved light fastness, water resistance, solvent resistance, etc. compared to the images produced by the conventionally known means described above, and also enables the production of colored images (natural colors) with an infinite number of colors, and also enables the production of colored images (natural colors) using conventional photosensitive materials. By replacing certain chromic acid-based, diazo-based, and silver salt-based resins with photosensitive resins, we have developed a method for manufacturing colored photo cards that is advantageous in terms of production, such as solving the problem of waste liquid pollution caused by them. It is something.

The structure of the substrate used in the present invention will be explained in detail below.

1 is a base material made of a transparent hard vinyl chloride sheet; 2
3 is a colored photosensitive resin layer coated on the upper surface of the base material 1;
is an alkali-soluble colloidal film layer coated on the top surface of the colored photosensitive resin layer 2, and the colored photosensitive resin substrate includes the base material 1 and the colored photosensitive resin layer coated on the top surface of the base material 1. 2 and an alkali-soluble colloid film layer 3 coated on the upper surface of the resin layer 2. Next, an example of manufacturing the colored photosensitive resin substrate will be described below.

First, a mixture of the colored photosensitive resins constituting the colored photosensitive resin layer 2 was used as agent C, and the above agent A was dissolved with stirring under heating at 8'C to 9'C, until it was completely dissolved. After that, the heating is stopped and the mixture is cooled to about 40° C. while stirring. The melted resin is transferred to a ceramic container, and the above-mentioned agent B is added to the melted resin and mixed for about 12 hours.

Next, the mixture of Part A and Part B is transferred to a mixer or a container equipped with a stirrer, and Part C is mixed therein.
The desired colored photosensitive resin can be obtained by stirring for about 2 hours.

Next, the material constituting the alkali-soluble colloid film layer 3 will be described. This material consists of a mixture of.

Next, to describe an example of the manufacturing process of the board, first, the thickness is 0.1
The above colored photosensitive resin is applied to the surface of the transparent hard vinyl chloride sheet 1 using a roll coater.

Next, the solvent contained therein is volatilized with hot air at a temperature of about 40° C. or lower to form layer 2. Next, the above-mentioned alkali-soluble colloid film layer constituent material is applied to the upper surface of this layer 2 using a roll coater, and completely dried with warm air at about 4°C to 50°C, thereby forming a colored photosensitive resin substrate. . This is a mixture illustrating the constituent materials of the mixtures A, B and C in other examples of the above manufacturing method, and the protective layer.

If these materials are manufactured according to the manufacturing process described in the first embodiment, an equivalent colored photosensitive resin substrate can be obtained.

Next, as a third embodiment, an example of the material composition and manufacturing process that is slightly different from the first and second embodiments is shown.
First, agent A is stirred and dissolved at a temperature of 80 to 90 degrees Celsius, and after it is completely dissolved, it is heated to approximately 4 degrees Celsius while continuing to stir.
The mixture is cooled to a temperature of 100.degree. C., and then the B agent is added and stirred for about 2 hours to obtain a photosensitive resin.

Further, the above photosensitive resin is applied to the surface of a transparent hard vinyl chloride sheet having a thickness of 0.1 mm using a roll coater.

Next, this layer is brought into contact with a finely divided colored pigment, and a pressure roller is passed through the layer to fix the colored pigment to the photosensitive resin layer. After that, the contained solvent was removed with warm air at 40°C to 50°C, and then a protective layer with the following composition was applied using a roll coater and completely dried with warm air at 40°C to 50°C, resulting in colored photosensitivity. A resin substrate is obtained. The constituent materials of the protective layer in this embodiment are the same as those in the first and second embodiments.

That is, the alkali-soluble colloid is It is a mixture of

The colored photosensitive substrate A has been described above. Next, the colored photosensitive substrate will be simply referred to as the substrate A, and a method for manufacturing a colored photographic card will be described with reference to FIG.

That is, a substrate A on which posifilms are stacked and exposed is treated with water to dissolve and remove only the alkali-soluble colloid film layer 3 of the substrate A.

Next, on the substrate A from which the alkali-soluble colloid film layer 3 has been removed, predetermined characters, patterns, etc. are applied in advance.
Alternatively, by covering and pressing an untreated sheet r, only the adhesive uncured portion 5 is transferred to the sheet 7, and a photographic image is formed on the sheet surface. Therefore, by covering the photographic image forming surface of the sheet r with the transparent film 8, the intended monochromatic colored photographic card can be obtained. Further, in the second embodiment, a monochromatic photographic image of, for example, blue is formed on the surface of the sheet 7 in the same manner as in the first embodiment, and then different colored photographic images of red and yellow formed in the same manner are replaced with the blue photographic image. By repeatedly overlapping the images in correspondence with each other, a photographic image in natural colors is created on the surface of the sheet r, and a card with a color photograph is completed.

As described above, the method for manufacturing colored photographic cards according to the present invention can eliminate the drawbacks of conventionally known card manufacturing methods, and the images according to the present invention have excellent light fastness, water resistance, durability, and solvent resistance. Another feature is that it is possible to obtain colored images that are composed of multiple colors and are close to natural colors.

The photosensitive resin of the present invention without silicic anhydride has high tackiness and tends to cause blocking, and it is difficult to sufficiently remove unnecessary portions during development due to its tackiness.

Silicic anhydride is added for this purpose; it reduces tackiness and prevents blocking, makes it easier for the developer to penetrate during development, and makes it easier to remove unnecessary parts.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, - Figure 1 is an explanatory diagram of a card board used in the present invention, and Figure 2 is an explanatory diagram of a card board used in the present invention. to the first
FIG. 3 is an explanatory diagram of a card manufacturing process according to an example. A... Colored photosensitive substrate, B... Negative or positive film, 1... Base material, 2...
colored photosensitive resin layer, 3... alkali-soluble colloid film layer, 4... photosensitive hardening section, 5...
...Uncured portion, 7... Sheet, 8...
・Transparent film.

Claims (1)

[Claims] 1 A colored photosensitive resin made by mixing a colored pigment, a solvent made of silicic anhydride, and alcohol with a composition containing a styrene maleic acid resin, a photocrosslinking agent, a photopolymerization initiator, and a polymerization inhibitor, and a substrate made of vinyl chloride. A colored photosensitive resin substrate is coated on top to form a colored photosensitive resin layer, and then a coating layer containing an alkali-soluble maleic acid copolymer such as a styrene maleic acid copolymer is provided on the surface of the colored photosensitive resin substrate. It is characterized by stacking posi films, exposing the posi film surface to actinic rays, then treating with water to remove only the coating layer, and then transferring the uncured portion of the colored photosensitive resin to the other sheet surface. How to make colored photo cards.