JPS61251838A - Plain paper transfer type light and pressure sensitive recording sheet - Google Patents

Abstract

PURPOSE:To enable a multicolor transfer image to be recorded on a plain paper by coating a support with a mixture of microcapsules contg. a photohardenable resin and microcapsules contg. a color forming agent or a fine powder of its agent. CONSTITUTION:The one side of the support is coated with a compsn. composed of waxes and polyvinyl ether, and microcapsules contg. a photohardenable resin and an electron donative colorless color forming agent, and other microcapsules contg. an electron receptive colorless color developing agent capable of reacting with this color forming agent or this color developing agent in a fine powder. This coated paper is combined with a plain paper to obtain the plain paper transfer type light and pressure sensitive recording sheet. The polyvinyl ether is used, preferably, in an amt. of 0.01-5wt% of the total weight of the color forming agent, the color developing agent, the waxes, etc., as the photohardenable resin, photopolymerizable resins, preferably, such as a cinnamic acid residue, are used, as the electron donor, 3,3-bis(p-dimethylaminophenyl)-6- dimethylaminophthalide, etc., are enumerated, and the electron receptive compd., acid clay, etc., are enumerated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a light-sensitive and pressure-sensitive recording sheet that can be transferred onto plain paper using a photocurable capsule.

@) Conventional technology Conventionally known pressure-sensitive copying paper is made by dissolving an electron-donating, colorless coloring agent (hereinafter referred to as coloring agent) in non-volatile oil, etc., and using this coloring agent-containing oil as a core material. Microcapsules are prepared, and an upper paper is coated on the back side of a support, and an electron-accepting colorless developer (hereinafter referred to as a color developer) is coated on the surface of the support. A colored image can be obtained on the lower paper by placing each coating layer facing the lower paper and writing on the surface of the upper paper or printing under pressure using a typewriter or the like.

There is also a pressure-sensitive copying paper that uses a coloring reaction based on a chelate-forming reaction using a metal compound and a ligand instead of the coloring agent and developer. When using these pressure-sensitive copying papers,
There is the inconvenience that the bottom paper must be used in combination.

There is also a type of self-coloring pressure-sensitive copying paper that is made by coating the above-mentioned corresponding re-reacting components on the same side of the support, but when pressurized, the image does not appear unless it is on the coated side. I can't get it. Furthermore, with self-coloring pressure-sensitive copying paper, even if the coated layer and plain paper are overlapped and printed, a colored image is obtained only on the coated layer, and no copy image is obtained on the plain paper. is already known.

As used herein, plain paper refers to a support without any reactants or co-reactants, such as electron-donating color formers or electron-accepting color developers, present on the support.

On the other hand, the color former (reactant or co-reactant) is placed on the same side of the support.
Pressure-sensitive copying paper containing a color developer (co-reactant or reactant) and capable of forming a copied image on plain paper is disclosed in JP-A-54-126111 and JP-B-Sho 53-
There is one disclosed in Japanese Patent No. 16728.

JP-A No. 54-126111 discloses that a coating liquid prepared by adding a solid color former and a solid color developer to a wax is coated in a single layer on a support, and It is clearly stated that the liquid exhibits a coloring reaction and becomes colored immediately after mixing the color former and the color developer.

That is, it relates to a pressure-sensitive transfer material having a colored coating layer, such as so-called back carbon paper, and because the coating layer is colored, there are disadvantages in appearance.

Japanese Patent Publication No. Sho 53-16728 relates to chelate coloring, in which a reactant is encapsulated and coated on a support, and then a co-reactant is dissolved in a solvent and coated on top of the support. The ninth problem with the use of solvents is that the walls of the microcapsules must be made of a material that is resistant to solvents. It also has many disadvantages from an environmental and economic perspective.

(C) Problems to be solved by the invention Japanese Patent Application Laid-open No. 121790/1982 and Japanese Patent Application Laid-open No. 121790/1983 are improvements to the publications listed in the prior art for the purpose of transfer to plain paper.
There is a publication No. 207088.

JP-A-56-121790 discloses that a pressure-sensitive copying paper of a plain paper transfer type is coated with a mixture of an electron-donating color former, an electron-accepting color developer, and waxes on the same side of a support. , is characterized by the combination of two types of waxes: ryomeite wax and other waxes.

JP-A-57-207088 discloses a plain paper transfer type pressure-sensitive copying paper in which a single layer of a ligand, a metal compound, and a wax is coated on the back side of a support.

These plain paper transfer type pressure-sensitive copying papers have good transferability to plain paper, and can be used for copying as needed by coating the entire surface or partially coating the support.

However, the above method is limited to single-color transfer to plain paper. In other words, the purpose is achieved by applying only one type of coloring component onto the support, and even if multiple types of coloring components are applied, the color that is simply transferred will be a mixed color. There is no other choice.

Furthermore, when the two components of a color former and a color developer are mixed and coated in a single layer, the presence of free color former solution and color developer solution in the microencapsulation, although both are microencapsulated, or There was a drawback that the microcapsules were destroyed during blending and handling, resulting in colored stains on the coated layer surface.

The present inventors have developed the present invention through intensive research aimed at transferring a desired color onto plain paper by coating a single layer of multiple color-forming components on a support and preventing stains on the coated layer surface. reached.

(2) Means for Solving the Problems The inventors of the present invention conducted extensive research to solve these drawbacks, and as a result, they were able to provide a plain paper transfer type photosensitive and pressure sensitive recording sheet.

That is, microcapsules mainly containing a photocurable resin and an electron-donating color former, and microcapsules or fine powder containing an electron-accepting color developer that reacts with the color former to produce a colored product. To provide a plain paper transfer type photosensitive pressure-sensitive recording sheet by combining a coated paper made by coating a color developer, a wax, and a polyvinyl ether on the same side of a support with plain paper. was completed.

Conventionally, microcapsules have been made by encapsulating liquid or solid substances, which are separated from other substances under normal conditions, and when necessary, the microcapsules are destroyed by applying an external impact, and the contents are separated. The purpose is to take out and react or mix it with other substances.

If the support coated with these nine microcapsules was pressurized, all of the nine microcapsules would be destroyed and the contents could not be leached out.

The photocurable microcapsules containing a photosensitive photocurable resin used in the present invention are those whose destruction due to pressure of the microcapsules is controlled by light.

That is, when it is time to take out the contents, if an impact is applied from the outside like a normal microcapsule, the microcapsule will be destroyed and the contents will ooze out. However, when you want to encapsulate the contents as they are, when you shine light on the microcapsules, the light that passes through the wall material of the microcapsules hardens the photocurable resin that is part of the contents, separating the contents from the liquid. Transforms into hard resin. As a result, the microcapsule becomes a rigid capsule, and even if an external impact is applied, the microcapsule will no longer be destroyed, and the contents will no longer ooze out. By using photocurable microcapsules having such characteristics, the plain paper transfer type photosensitive pressure sensitive recording sheet used in the present invention can be obtained.

There are two types of microcapsules: photo-curing microcapsules containing a reactant and photo-curing microcapsules containing a co-reactant that produces a colored substance upon contact with the reactant, as well as waxes. A light-sensitive pressure-sensitive recording sheet coated with a light-sensitive pressure-sensitive layer as a main component and an original are superimposed.

At this time, if the document support is made of a material that easily transmits light, especially ultraviolet rays, the coated side of the photosensitive pressure-sensitive recording sheet and the written or printed side of the document, that is, the surface, should be stacked so that they face each other. Expose from the original side.

In addition, if the support of the original is difficult to transmit light, such as a book, a transparent box is used so that the coated surface of a photosensitive pressure-sensitive recording sheet using a support similar to that support faces the writing or printing surface of the original. The recording sheets are stacked one on top of the other and exposed to light from the recording sheet side. It is desirable to adjust the exposure time depending on the combination of the recording sheet and the original.

When exposed to light, the written or printed design or character part of the original absorbs light and the recording sheet is not exposed to light, but other parts are exposed to light because the light is transmitted or reflected, and the light coated on these parts is exposed. The contents of the curable microcapsules are cured. When the exposed recording sheet is stacked with plain paper and processed with a roll or the like, the microcapsules in the areas corresponding to the designs and characters of the original are destroyed, producing colored substances in which the reactants and co-reactants come into contact, and the original is damaged. The same designs and characters are transferred and recorded.

When the plain paper transfer type photosensitive pressure sensitive recording sheet of the present invention is used,
As is already clear, a normal manuscript in positive type can be used, which can optionally be a handwritten document or a printed document such as a book. Only the microcapsules in the areas corresponding to the designs and text of the Mayu manuscript are destroyed and a colored image is formed on plain paper, so coloring in areas other than the designs and text is difficult.
It does not cause discoloration and has excellent storage stability.

The plain paper transfer type photosensitive and pressure sensitive recording sheet of the present invention has the following characteristics. For example, a recording sheet is prepared using microcapsules containing a photocurable resin and a coloring agent, microcapsules containing a color developer, or a finely powdered color developer, and then exposed to light using the above-mentioned exposure method and then pressurized. At this time, only the recorded image can be clearly recorded, and the color forming agent-containing microcapsules in the exposed area, that is, the non-image area, become rigid capsules and no transfer occurs at all.

Furthermore, if the microcapsules contain a photocuring resin or a photopolymerization initiator in which two or more color formers and color developers each have different absorption wavelengths, each microcapsule becomes a rigid body by exposure to light. This means that encapsulation can be controlled and multicolor transfer recording can be performed.

Further, in the plain paper transfer type photosensitive and pressure sensitive recording sheet of the present invention, it is also possible to instantaneously create a so-called desensitized area by light.

In other words, if the areas that do not require recording are exposed to light before using the recording sheet, the photocurable capsules in the exposed areas will harden and a colored recorded image will not be produced even if the areas are written under pressure during recording. It is also possible to prevent this from occurring.

On the other hand, the plain paper transfer type photosensitive pressure sensitive recording sheet according to the present invention can also be used as a plain paper transfer type photosensitive pressure sensitive copying paper. In this case, a copied image can be obtained by overlaying the coated side with plain paper and applying pressure from a pen or a typewriter on the non-coated paper surface, but the recorded image obtained on the plain paper cannot be transferred. However, the transfer density of the copied image was very low.

By adding waxes to the coating layer, the transfer density of the copied image can be improved. This is because when the microcapsules are destroyed by pressure, the solvent in the internal phase is absorbed into the support surface of the coated paper, reducing transferability, and the wax in the coating layer also has a water- and oil-repellent effect. This is due to the fact that the internal phase solvent is transferred to plain paper, leading to improved transferability.

Furthermore, the plain paper transfer type photosensitive and pressure sensitive recording sheet of the present invention has microcapsules mainly containing a color former and a photocurable resin, and microcapsules of a color developer, or a finely powdered color developer mixed therein. However, staining of the surface of the coated layer may occur due to incomplete release of microcapsules from the color former solution or developer solution during the microencapsulation process, or destruction of the microcapsules during handling.

In order to improve these, one of the features of the present invention is to mix polyvinyl ether. By mixing this polyvinyl ether, there is no staining on the surface of the coated layer and it is effective.

Another feature of the present invention is that polyvinyl ether has adhesive properties, which is its own characteristic, so that it can also function as a binder to the support.

Furthermore, it has properties as a softener, and can reduce the coloring that occurs when the coated paper is folded.

The amount of polyvinyl ether used in the present invention is O, O, and
It is effective to set the O content to 1 to 10 weight percent.

Preferably it is 0.01 to 5 weight percent.

Regarding the polyvinyl ether used in the present invention, polyvinyl methyl ether, polyvinylethyl ether,
Examples include polyvinylpropyl ether, polyvinyl ethyl ether, and polyvinyl isobutyl ether.

The photocurable resins encapsulated in the photocurable microcapsules used in the present invention include cinnamic acid residues, cinnamylidene residues, α, β-unsaturated ketone residues, coumarin residues, anthracene residues, α- Photodimerizable resins with photosensitive groups such as phenylmaleimide residues, benzophenone residues, and stilbene residues, photosensitive groups such as diazonium salt residues, quinonediazide residues, azide residues, dithiocarbamate residues, and benzoin residues. Photodegradable resin A photopolymerizable resin having an acryloyl group, an allyl group, a vinyl group, an epoxy group, etc. can be used as desired, but a photopolymerizable resin is preferable. As for the shape, a liquid one is advantageously used. However, any known compound commonly used as a photopolymerization initiator for polymerizing photocurable resins may be used, such as benzoin alkyl ether, benzophenone, Michler's ketones, thioxanthone, a7tophenone, etc. For example, anthraquinone, 5-nitrofluorene, etc. are used as photosensitizing aids that have the effect of broadening the sensitizing wavelength range of the polymerization initiator, and stabilizers such as radical polymerization inhibitors, modifiers, etc. are used to improve storage stability. A diluent such as a relatively low molecular weight oligomer or monomer may also be included at the same time. At the same time, in order to improve the solubility of the reactants to be encapsulated, high-boiling point oily solvents, such as tungsten, alkylnaphthalenes, alkylbiphenyls, alkylidene biphenyls, esters, etc., are sometimes used as solubilizing agents. It is inappropriate to use a large amount because it adversely affects the degree of curing.

As the electron donating compound used in the present invention, 3.3
-bis(P-dimethylaminophenyl)-6-dimethylaminophthalide, 3.3-bis(P-dimethylaminophenyl)phthalide, 3-(P-dimethylaminophenyl)-3-(1,2 -Triarylmethane compounds such as dimethylindol-3-yl) phthalide, diphenylmethane compounds such as 4,4'-bisdimethylaminobenzhydrin benzyl ether, 3-dimethylamino-7-
xanthine compounds such as medoxyfluora, 3-diethylamino-7-chlorofluoran, 3-diethylamino-7-dibenzylaminofluorane, thiazine compounds such as benzoylleucomethylene blue, 3-methyl-spiro-dinaphthopyran, 3-diethylamino-7-dibenzylaminofluoran, etc. Examples include spiro compounds such as propyl-spirodibenzopyran.

Examples of electron-accepting compounds include acid clay, activated clay, inorganic acid substances such as kaolin, zeolite, and bentonite;
- Substituted phenolic compounds such as cresol, P-octylphenol, P-cyclohexylphenol, P-phenylphenol, α-naphthylphenol, cumylphenol, P-chlorophenol, phenol-formalin condensate, substituted phenol-formalin condensate, etc. Phenol resin compounds and metal salt-modified phenol resin compounds obtained by modifying them with polyvalent metals such as zinc and nickel, P-butylbenzoic acid, P-hydroxybenzoic acid, 2.
5-dihydroxybenzoic acid, salicylic acid, 5-tert
- Aromatic carboxylic acid compounds such as butylsalicylic acid, 3゜5-di-teru-butylsalicylic acid, and 3,5-di(α-methylbenzyl)salicylic acid, and their metal salts with polyvalent metals such as zinc and nickel. Examples include metal salts of aromatic carboxylic acid compounds or mixtures of aromatic carboxylic acid compounds and polyvalent metal compounds such as zinc acetate and zinc propionate.

The waxes of the present invention include beeswax, spermaceti wax, Chinese wax,
Animal waxes such as lanolin, candelilla wax,
Vegetable waxes such as carnauba wax, wood wax, rice wax, and sugar cane wax; mineral waxes such as montan wax, osikerite, ceresin, and lignite wax; petroleum waxes such as paraffin wax and microblisterine wax; and montan wax derivatives. ,
Modified waxes such as paraffin wax derivatives and microcrystalline wax derivatives, hydrogenated waxes such as castor wax and opal wax, low molecular weight polyethylene and its derivatives, synthetic waxes such as acra wax and distearyl ketone, caproic acid amide, caprylic acid amide, Saturated fatty acid amide waxes such as pelargonic acid amide, capric acid amide, lauric acid amide, tridecylic acid amide, myristic acid amide, stearic acid amide, behenic acid amide, ethylene bisstearic acid amide, caproleic acid amide, myristoleic acid amide, Unsaturated fatty acid amide waxes such as oleic acid amide, elaidic acid amide, linoleic acid amide, erucic acid amide, ricinoleic acid amide, and linoleic acid amide can be used alone or in combination.

The microcapsules used in the present invention can be manufactured by methods known in the art. For example, U.S. Patent No. 28004
57, the phase separation method from an aqueous solution as shown in the specification of No. 2800458, etc., Japanese Patent Publication No. 38-19574,
1n-situ polymerization by interfacial polymerization as shown in Japanese Patent Publication No. 42-446, Japanese Patent Publication No. 771-1971, monomer polymerization as shown in Japanese Patent Publication No. 36-9168, Japanese Patent Application Laid-Open No. 51-9079, etc. method, the melting dispersion cooling method shown in British Patent No. 952807, British Patent No. 965074, etc.
US Patent No. 3111407, UK Patent No. 930422
Examples include the spray drying method shown in the specification of No. 1, etc., but are not limited thereto. In addition, as wall film forming materials, gelatin, gum arabic starch, sodium alginate, ethyl cellulose, carboxyethyl cellulose, polyvinyl alcohol, polyethylene, polyamide, polyester, polyurethane, polyethylene imine, etc. are used, but they are sufficiently transparent to light, especially ultraviolet light. It is more preferable to use a material that allows

Ultraviolet light is generally used as light for curing the photocurable microcapsules used in the present invention. As light sources, sunlight, xenon lamps, low-pressure and high-pressure water lamps, fluorescent lamps, etc. are used. There is little deterioration in the properties of the light and pressure sensitive recording sheets due to exposure to light such as that which occurs in room lights or indirect sunlight during manufacturing and during normal handling times.

In order to hold the photosensitive pressure sensitive layer of the plain paper transfer type photosensitive pressure sensitive recording sheet of the present invention on a support, generally a water-soluble binder,
Latexes are used.

For example, gelatin, casein, carboxymethylcellulose, hydroxymethylcellulose, oxidized starch, esterified starch, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid, vinyl acetate-acrylic acid copolymer, acrylo-nitrile-butadiene copolymer,
Examples include water-soluble polymers such as vinylidene chloride copolymers and latexes. These are selected from the viewpoints of film surface strength, dispersibility, etc., and used alone or in combination.

The photosensitive pressure sensitive layer of the plain paper transfer photosensitive pressure sensitive recording sheet of the present invention further contains capsule protectants such as cellulose powder, starch particles, and plastic particles, inorganic pigments such as talc, calcium carbonate, zinc oxide, and titanium oxide, Organic pigments such as urea-formalin resin, dispersants, antifoaming agents, etc. may be added.

An example of a coating method is an air knife coater.

Examples include methods of coating the entire surface of the support using a blade coater, gravure coater, etc., and coating a portion of the support using a flexographic printing machine, gravure printing machine, etc.

The support can be arbitrarily selected from transparent, translucent, and opaque. For example, paper, various nonwoven fabrics, synthetic paper, metal foil, plastic film, etc., or composite sheets made of these materials may also be used.

@) Function The plain paper transfer type photosensitive and pressure sensitive recording sheet of the present invention comprises microcapsules containing a photocurable resin and a coloring agent, and microcapsules containing a color developer that reacts with the coloring agent to form a colored substance. or a finely powdered color developer, wax, and polyvinyl ether as main components, which are coated on the same side of a support, and are characterized by being able to perform transfer recording, especially multicolor transfer recording, on plain paper.

Conventional coatings with multiple types of microcapsules containing only a coloring agent without a photocuring resin result in a mixed color transfer record, but by incorporating a photocuring resin, the coloring agent-containing microcapsules are more easily exposed to light. By controlling the destruction of the microcapsules as rigid capsules, transfer recording of a desired color can be achieved.

Furthermore, it is characterized in that it is possible to obtain a white background with no stains on the coated surface.

staff) Example The present invention will be explained in detail with reference to Example t below.

Note that "parts" indicate parts by weight.

Example 1゜(1) Photocurable microcapsules containing a color former were prepared as follows.

lθ% aqueous solution of ethylene-maleic anhydride copolymer 10
0 parts, 10 parts of urea, 1 part of resorcinol, and 200 parts of water were mixed to form a solution, and the pH was adjusted using an aqueous sodium hydroxide solution.
Adjusted to 3.5. Electron-donating compounds as reactants, namely 7.2 parts of 3-diethyrylamino-6-methyl-7-difluorane, benzoin ethyl ether O,S
Epoxy acrylate-based photocurable resin in which a is dissolved (
172.8 parts of Lipoxy (trade name: manufactured by Showa Kobunshi) were emulsified and dispersed in the above mixed aqueous solution to form an oil-in-water emulsion with oil droplets of 4 to 8 microns. Next, 25 parts of a 37% formaldehyde aqueous solution was added, the liquid temperature was maintained at 55°C, stirring was continued for 4 hours, and then the mixture was cooled to room temperature to complete encapsulation.

(2) Microcapsules containing a color developer were prepared as follows.

Instead of the 3-diethylamino-6-methyl-7-anilinofluorane, benzoin ethyl ether, and eboxy arylate photocurable resin in (1) above, an electron-accepting compound, namely p-7 enylphenol [fat 35 m Encapsulation was carried out in the same manner except that 53 parts of 1,1-diphenylethane were used.

(3) Prepare a coating liquid with the following composition and have a basis weight of 50? /-
It was coated on paper using a Meyer bar.

Photocurable microcapsules containing a color former 10 parts Microcapsules containing a color developer 20 parts Polyvinyl methyl ether 1 part Paraffin wax
10 parts wheat starch
20 parts SBR latex 10
The coated surface of the 9 plain paper transfer photosensitive and pressure-sensitive recording sheet obtained in this way was overlaid with the surface of 11 handwritten on translucent paper as a manuscript, and from the manuscript side, the litho-xenofax F
After irradiating xenon light using "X-1501", a plain paper transfer type photosensitive pressure sensitive recording sheet is placed over plain paper and passed between rubber rolls and pressure is applied, and a transferred image of the same characters as the original appears on the plain paper as black. Next.

In addition, no coloring occurred in areas other than the letters, leaving the background white. Note that the background of the coated layer surface of the recording sheet before exposure was free from any stains and had a white background.

Example 2 (1) Production of photocurable microcapsules containing a color former (colorless dye that develops a black color).

Microencapsulation was carried out in the same manner as in Example 1 (1) except that a photopolymerization initiator containing rnaxt- was used in place of the photopolymerization initiator benzoin ethyl ether used in Example 1 (1).

(2) M is a photocurable microcapsule containing a coloring agent (colorless dye that develops a red color).

The photopolymerization initiator having ma Microencapsulation was carried out in the same manner except that 3-diethylamino-7-chlorofluorane was used instead.

(3) Preparation of color developer 3. Powders of 90 parts of 5-di-tert-butylsalicylic acid and 115 parts of zinc salicylate were made into a fine powder dispersion using a ball mill by adding a dispersant of 5% by weight of the total amount. .

(4) A coating solution having the following formulation was prepared and coated on paper with a basis weight of 50 P/- using a Meyer par.

Above (110 color former-containing photocurable microcapsules 10
Part 1 of the above (2: photocurable microcapsules containing a coloring agent)
Parts Finely powdered dispersion of the color developer in (3) above 10 parts Polyvinyl methyl ether 2 parts Paraffin wax 20 parts Wheat starch
40 parts SBR latex
Using 20 copies of the thus obtained plain paper transfer type light and pressure sensitive recording sheet 1 with no colored stains on the coated layer surface, transfer recording in two colors, black and red, was carried out in the following manner.

First, 250 parts of light was irradiated from the side of the original 1 using a 0-spectral filter that overlapped the surface of the original 1 made of a translucent sheet and the coated surface of the recording sheet.

Here, the photocurable microcapsules described in (2) above, which are sensitive to a wavelength of 250 parts m, became rigid capsules in the background portion of the document 1. After exposure, the unexposed areas of the recording sheet retain red and black colors.

Subsequently, the surface of the original 20 made of a translucent sheet and the coated surface of the recording sheet are overlapped. In this case, the original 2 needs to be created to form a black image. Then, using a spectral filter, the original 2 was irradiated with light having a wavelength of 300 m from the side.

At this time, all of the photocurable microcapsules described in (1) above, which are sensitive to a wavelength of 300 parts m, in the background area of the original 2 other than the unexposed area became rigid capsules. Due to the two exposures, the black and red color former photocurable microcapsules are pressure-sensitive and held on the coated surface in each unexposed area.

The recording sheet exposed twice in this way was stacked on plain paper and pressed between rubber rolls to obtain a two-color transferred image of black and red on the plain paper.

Effects of the Invention The plain paper transfer type photosensitive and pressure sensitive recording sheet of the present invention uses a plurality of types of microcapsules mainly containing a photocuring resin and a coloring agent and coats them on a support in a mixed manner. It is capable of color transfer recording, and is of extremely high industrial significance in the present day when there is a demand for copy recording of colored images.

Proceedings (self-initiated) 1. Indication of the case 1985 Patent Application No. 93266 2. Name of the invention Plain paper transfer type photosensitive and pressure sensitive recording sheet 3. Person making the amendment Relationship with the case Patent applicant contact information ! (600) 2111 4. Column for detailed explanation of the invention subject to amendment

Claims (1)

[Scope of Claims] 1. Microcapsules mainly encapsulating a photocuring resin and an electron-donating colorless coloring agent, and encapsulating an electron-accepting colorless developer that reacts with the coloring agent to produce a colored product. A plain paper transfer type characterized by combining plain paper with a coated paper made by coating the same side of a support with components consisting of microcapsules or fine powder color developer, waxes, and polyvinyl ether. Photosensitive pressure sensitive recording sheet. 2. The plain paper transfer type photosensitive pressure-sensitive recording sheet according to claim 1, wherein the polyvinyl ether is polyvinyl methyl ether, polyvinylethyl ether, polyvinyl propyl ether, polyvinyl butyl ether, or polyvinyl isobutyl ether. .