JPS63287846A - Photosensitive material - Google Patents

Abstract

PURPOSE:To suppress uneven transfer with a relatively long period and the formation of spots of <=about 1mm diameter and to obtain a clear transferred image by using specified paper as the base paper of a paper support. CONSTITUTION:When a photosensitive layer contg. silver halide, a reducing agent and a polymerizable compd. is formed on a paper support to obtain a photosensitive material, one-side glazed paper obtd. by bringing one side of wet paper into contact with a drier having a heated mirror finished surface to dry the paper is used as the base paper of the paper support. The photosensitive layer side of the base paper is a smooth surface having >=200'' Bekk smoothness stipulated by JIS. A photosensitive material suppressing uneven transfer with a relatively long period and the formation of spots of <=about 1mm diameter is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a photosensitive material having a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound on a support.

[Background of the Invention] A photosensitive material that has a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound on a support forms a latent image of silver halide, and the polymerizable compound is removed by the action of the reducing agent. It can be used in image forming methods that involve polymerization.

Examples of image forming methods are described in Japanese Patent Publications Nos. 45-11149, 47-20741, 49-10697, and 57-138632 and 58-169143. In these methods, when exposed silver halide is developed using a developer, coexisting polymerizable compounds (eg, vinyl compounds) start polymerizing to form image-like polymeric compounds. Therefore, the above method is
Development processing using a liquid was required, and the processing required a relatively long time.

As an improvement on the above method, Japanese Patent Application Laid-Open No. 61-69062 describes a method in which a polymer compound can be formed by dry processing. This method uses a photosensitive silver salt (silver halide), a reducing agent, a crosslinking compound (polymerizable compound)
A latent image of a photosensitive silver salt is formed by imagewise exposing a recording material (photosensitive material) in which a photosensitive layer consisting of a binder and a binder is carried on a support to form a latent image, and then thermally developing it. A polymer compound is formed on the exposed portion.

These image forming methods are methods of polymerizing a polymerizable compound in a portion where a silver halide latent image is formed.

Furthermore, a method capable of polymerizing a polymerizable compound in a portion where a latent image of silver halide is not formed was disclosed in JP-A-61
It is described in JP-260241. This method is
By heating, a reducing agent is made to act on the area where the silver halide latent image is formed, and at the same time, polymerization of the polymerizable compound is suppressed.

It promotes polymerization of other parts.

As one embodiment of the image forming method as described above, a photosensitive material having a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound is placed on a support simultaneously with imagewise exposure or after imagewise exposure. A development process is performed to polymerize the polymerizable compound, and by applying pressure with an image-receiving material layered on the developed photosensitive material, the unpolymerized polymerizable compound is transferred to the image-receiving material, and the image-receiving material is An image forming method for forming an image thereon is described in JP-A-61-73145.

On the other hand, paper is sometimes used as a support for photosensitive materials because it is inexpensive, easily disposable, lightweight, and easy to handle. However, when an image is obtained on an image-receiving material by the above-described transfer-type image forming method using a paper support, transfer unevenness may occur in a portion of the transferred image where the concentration of the polymerizable compound is extremely low.

It is possible to reduce the above-mentioned transfer unevenness by increasing the thickness of the paper support, but when considering aspects such as image forming processing, storage space, and cost, it is possible to reduce the thickness of the photosensitive material. is not desirable. It is also possible to reduce uneven transfer by significantly increasing the pressure applied during transfer, but to do so, it is necessary to make the pressure device more powerful than the machine normally used. be.

[Summary of the Invention] Research conducted by the present inventors has revealed that the problem of relatively large periodic transfer unevenness on the order of several mm can be solved by the fact that the surface on which the photosensitive layer is provided is defined by JIS-P-8119. It has been found that the problem can be solved by using a paper support with a smooth surface having a Bekk smoothness of 300 seconds or more (Japanese Patent Application No. 191273/1982).

The purpose of the present invention is to solve the problem of relatively large periodic transfer unevenness as described above, even though a paper support is used.
It is an object of the present invention to provide a photosensitive material in which spot unevenness with a diameter of about 1 mm or less hardly occurs.

The present invention relates to a photosensitive material comprising a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound on a paper support, the side of the base paper of the paper support on which the photosensitive layer is provided. The surface is a smooth surface with a Bekk smoothness of 200 seconds or more as defined by JIS-P-8119, and the base paper of the paper support is dried by bringing one side of the wet paper into close contact with a heated mirror dryer. The present invention provides a photosensitive material characterized by the resulting glossy paper.

[Effects of the Invention] In the photosensitive material of the present invention, a glossy paper obtained by drying one side of a wet paper in close contact with a heated mirror dryer is used as a base paper for a paper support.

According to research by the present inventors, the glossy paper obtained as described above generally has a smooth surface with a Bekk smoothness of 200 seconds or more. That is, the above-mentioned glossy paper has few surface irregularities that cause transfer unevenness with a relatively large period.

Moreover, the surface fibers of the smooth surface of the above-mentioned glossy paper have been appropriately keratinized by a heated mirror dryer. This is because the surface fibers are keratinized.

The glossy paper obtained as described above has few short-period surface irregularities.

As a result, the photosensitive material of the present invention can provide a clear transferred image in which not only relatively large-period transfer unevenness but also spotty unevenness with a diameter of about 1 mm or less does not occur. In addition, the photosensitive material of the present invention may have a thicker support,
Alternatively, the above-mentioned problem of uneven transfer can be solved easily and cost-effectively compared to using a powerful pressure device.

Note that, as mentioned above, the surface fibers of glossy paper are keratinized, so in the process of coating the photosensitive layer on the surface of the paper support, the amount of water in the coating liquid absorbed by the paper support is small.
Therefore, in the production of the photosensitive material of the present invention, the smoothness of the paper support does not decrease much. Even if the transfer rate is 200 seconds to 300 seconds, the above-mentioned problem of uneven transfer can be sufficiently solved.

Furthermore, since the amount of water in the coating solution for the photosensitive layer absorbed by one paper support is small, the photosensitive material of the present invention has less occurrence of transfer unevenness caused by uneven penetration of components in the coating solution.

[Detailed Description of the Invention] The photosensitive material of the present invention has a paper support. In this specification, 1 paper support 1 is a base paper whose main component is wood pulp (
In this specification, it means rM paper (abbreviated as rM paper J), or a sheet-like product in which an arbitrary coating layer is provided on a base paper.

In the photosensitive material of the present invention, glossy paper obtained by drying one side of a wet paper in close contact with a heating mirror dryer is used as a base paper for a paper support. A typical example of the heating mirror dryer is a Yankee dryer. A Yankee dryer generally has a large dryer cell with a diameter of 3 m or more, and the surface of the dryer is highly polished.

The heating temperature of the dryer is preferably 100°C to 200°C, more preferably 120°C to 170°C. Further, the moisture content of the wet paper when it comes into contact with the dryer is preferably 50 to 80%,
More preferably, it is 60 to 70%.

Hereinafter, the structure of the paper support used in the present invention and other specific means for achieving a high Beck smoothness that can be used in combination with the dryer described above will be explained.

The base paper used for the paper support uses wood pulp as its main raw material, and is manufactured by making paper from this. As the wood pulp, both softwood pulp and hardwood pulp can be used, but it is preferable to use hardwood pulp, which has short fibers and is easily smooth. Specifically, among the pulps that make up the base paper,
It is preferred that 60% by weight or more be hardwood pulp.

Note that, if necessary, a part of the wood pulp may be replaced with synthetic pulp made of polyethylene, polypropylene, etc., or synthetic fiber made of polyester, polyvinyl alcohol, nylon, etc.

Further, the freeness of the entire pulp used is preferably 200 to 400 cc according to the C3F standard. moreover,
Regarding the fiber length after beating, it is preferable that the 24+42 mash residue defined by JIS-P-8207 is 40% by weight or less.

It is preferable to internally add fillers such as calcium carbonate, talc, clay, kaolin, titanium dioxide, and urea resin fine particles to the base paper for the purpose of improving smoothness. Among these fillers, talc and clay are preferred. Particularly preferable 0
The base paper used in the present invention preferably contains the above-mentioned filler in an amount of 5% by weight or more, particularly preferably 10% by weight or more.

Internally added chemicals other than the fillers listed above include internally added sizing agents such as rosin, paraffin wax, higher fatty acid salts, alkenyl succinates, fatty acid anhydrides, and alkyl ketene dimers; polyacrylamide, starch, polyvinyl alcohol,
Paper strength agents such as melamine formaldehyde composites; Softeners such as reaction products of maleic anhydride copolymers and polyalkylene polyamines, quaternary ammonium salts of higher fatty acids;
Fixing agents such as sulfuric acid, polyamide polyamine epichlorohydrin, colored dyes, fluorescent dyes, etc. may be added to the base paper as necessary.

The base paper used for the paper support is made using the above-mentioned paper stock using a fourdrinier paper machine or cylinder paper machine.The base paper used for the paper support of the photosensitive material of the present invention is made as follows In the step of drying the wet paper of the paper machine, the heated mirror dryer described above is used. As the paper machine, it is preferable to use a Yankee paper machine in which the aforementioned Yankee dryer is incorporated in the drying section. The weight of the base paper is 20 to 20
Preferably 0 g/d, 30 to 100 g/r
Particularly preferred is n'. The thickness of the base paper is preferably 25 to 250 μm, and the thickness is 40 to 150 μm.
Particularly preferred is m.

Further, the base paper is preferably subjected to a calender treatment such as an on-machine calender in a paper machine or a super calender after paper making for the purpose of improving smoothness. From the above calendering process, the density of the base paper is JIS-P
-8118, it is preferably 0.7 to 1.2 g/rn', particularly preferably 0.85 to 1.10 g/rn'.

As mentioned above, the base paper obtained by drying it in close contact with a heated mirror dryer is generally a smooth surface such that the surface in close contact with the dryer has a Bekk smoothness of 200 seconds or more as defined by JIS-P-8119. becomes. In addition,
It is also possible to further improve Beck smoothness by selecting the type of raw material pulp, using a relatively large amount of filler, performing calender treatment, etc. Further, it is more preferable that the Bekk smoothness is 250 seconds or more.

The above Bekk smoothness is the amount required for 1 Om fL of air to pass between the glass surface and a 5 mm square test piece that is tightly attached at a pressure of 1 kg/crn' when the degree of vacuum is maintained at 370 mm in terms of mercury column. It's time.

The details of the above test method and the instruments used for measurement are in accordance with the 1963 Japanese Industrial Standards.

Note that the side of the paper support on which the photosensitive layer is not provided is also
It is preferable that the surface has a smooth surface having a Bekk smoothness defined by JIS-P-8119 of 100 seconds or more. In particular, when a transferred image is formed under high pressure, the occurrence of uneven transfer is affected not only by the smoothness of the surface of the paper support but also by the smoothness of the back surface of the paper support. In order to improve the smoothness of the back surface as well as the front surface of the paper support, it is preferable to carry out supercalender treatment and/or coating of a pigment on the back surface of the base paper after drying the base paper using the above-mentioned heated mirror dryer.

The temperature of the calender roll in the above supercalender treatment is preferably 20 to 110°C, and
More preferably, the temperature is 0 to 90°C, and the pressure of the calender roll is 20 to 500 kg/
cm, preferably 50 to 300 kg
/cm is more preferable. Furthermore, the amount of moisture contained in the base paper when calendering is carried out is preferably 3 to 10%, and 5 to 8%.
It is more preferable that

Examples of pigments that can be applied to the back side of the base paper include clay, kaolin, calcium carbonate and titanium oxide. In applying the pigment, it is preferred to use a suitable binder. Examples of binders include starch, styrene-butadiene copolymers,
Mention may be made of methyl methacrylate-butadiene copolymer and polyvinyl alcohol. As a means for applying the pigment to the back side of the base paper, a known size press,
A gate roll coater, bill blade coater, air knife coater, etc. can be used.

In the photosensitive material of the present invention, the above-described base paper can be used as it is as a paper support.

Alternatively, a base paper with an arbitrary coating layer provided on its surface may be used as a paper support.

Note that a known surface sizing agent may be applied to the surface of the base paper, and an arbitrary coating layer may be provided thereon. Examples of surface sizing agents include polyvinyl alcohol, starch, polyacrylamide, gelatin, casein, styrene maleic anhydride copolymer, alkyl ketene dimer, polyurethane, epoxidized fatty acid amide, and the like.

There is no particular restriction on the composition of the coating layer, but it is preferable that it contains a hydrophobic polymer. By providing a coating layer containing a hydrophobic polymer, the water absorption of the paper support is reduced, which is caused by the water absorption during coating of the photosensitive layer. Support distortion can be reduced. Specifically, the surface of the paper support on which the photosensitive layer is provided preferably has a Copp water absorption of 3 g/rn' or less as defined by JIS-P-8140.

The hydrophobic polymer may be a homopolymer or a copolymer. In addition, in the case of a copolymer, even if it has hydrophilic repeating units in part, it is sufficient as long as it is hydrophobic as a whole. Examples of the above-mentioned hydrophobic polymer include vinylidene chloride,
Styrene-butadiene copolymer, methyl methacrylate-butadiene copolymer, acrylonitrile-butadiene copolymer, styrene-acrylic ester copolymer, methyl methacrylate-acrylic ester copolymer, and styrene-methacrylate-
Examples include acrylic ester copolymers.

It is further preferable that the hydrophobic polymer has a crosslinked structure. In order to introduce a crosslinked structure into a hydrophobic polymer, a known curing agent (crosslinking agent) may be used together with the hydrophobic polymer during production of the paper support. Examples of the curing agent include active vinyl compounds such as 1,3-bis(vinylsulfonyl)-2-propanol and methylene bismaleimide; 2,4-dichloro-6-hydroxy=S-) riazine sodium salt; , 2,4-dictfftff-6-hydroxy-3-)riazine, N,N''-bis(2-chloroethylcarbamyl)piperazine and other active halogen compounds; bis(2,3-epoxypropyl)methyl Examples include epoxy compounds such as propylammonium P-)luenesulfonate, and methanesulfonic acid ester compounds such as 1,2-di(methanesulfonoxy)ethane.

A pigment may be added to the coating layer for the purpose of improving the smoothness of the coating layer, facilitating layer formation during manufacturing, and the like. As the pigment, pigments used in known coated papers (coated paper, art paper, baryta paper, etc.) can be used. Examples of pigments include inorganic pigments such as titanium dioxide, barium sulfate, talc, clay, kaolin, calcined kaolin, aluminum hydroxide, amorphous silica, crystalline silica, synthetic alumina-silica; and polystyrene resins, acrylic resins, urea formalin. Examples include organic pigments such as resins.

Furthermore, a waterproofing agent may be added to the coating layer. Examples of the water-resistant agent include polyamide polyamine epichlorohydrin resin, polyamide polyurea resin, glyoxal resin, and the like. Among these, formalin-free polyamide polyamine epichlorohydrin resins and polyamide polyurea resins are particularly preferred.

The coating layer as described above includes a hydrophobic polymer, a curing agent,
It can be easily provided by coating the base paper with a latex-like coating liquid in which components such as pigments and waterproofing agents are dissolved, dispersed, or emulsified. As a method for applying the coating liquid onto the base paper, a known dip coating method, air knife coating method, curtain coating method, roller coating method, doctor coating method, gravure coating method, etc. can be used.

The coating layer as described above is preferably provided on the base paper in a coating amount of 1 to 30 g/rr+'. A more preferred coating amount is 5 to 20 g/m'.

In addition, for the purpose of improving the smoothness of the paper support, a calender treatment such as a gloss calender or a super calender may be performed during or after coating the above-mentioned coating layer.

In the following margin, the silver halide, reducing agent, and polymerizable compound constituting the photosensitive layer provided on the above-mentioned support will be sequentially explained.

Light-sensitive materials contain silver chloride, silver bromide, silver halide,
Any grains of silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide, or silver chloroiodobromide can be used. The halogen composition of the silver halide grains may be uniform or non-uniform on the surface and inside. Also, patent application No. 61-2557
Silver halide grains having a high proportion of silver iodide in the shell portion may be used as in the photosensitive material described in the specification of No. 6. There is also no particular restriction on the crystal habit of the silver halide grains.

For example, tabular grains having an aspect ratio of 3 or more may be used as in the photosensitive material described in Japanese Patent Application No. 61-55509.

In the silver halide used in the present invention, two or more types of silver halide grains different in halogen composition, crystal habit, grain size, etc. can also be used in combination. There are no particular restrictions on the grain size distribution of silver halide grains. For example, the patent application
Monodisperse silver halide grains having a substantially uniform grain size distribution may be used, as in the photosensitive material described in Specification 4 of No. 55508.

In the present invention, the average grain size of the silver halide grains is preferably 0.001 to 5 ILm,
More preferably, it is O', 001 to 2JLm. The amount of silver halide contained in the photosensitive layer is preferably in the range of O.1 mg to Log/rrf in terms of silver, including an organic silver salt which is an optional component described below.

A reducing agent that can be used in a light-sensitive material has a function of reducing silver halide and/or a function of promoting (or inhibiting) polymerization of a polymerizable compound. There are various types of reducing agents having the above functions. The reducing agents include hydroquinones, catechols, p-aminophenols, p-phenylenediamines, 3-pyrazolidones, 3-7minovirazoles, 4-amino-5-
Pyrazolones, 5-aminouracils, 4゜5-dihydroxy-6-aminopyrimidines, diductones, amylreductones, 0- or p-sulfonamidophenols, O- or p-sulfonamidonaphthols,
2-sulfonamide indanones, 4-sulfonamide-5-pyrazolones, 3-sulfonamide indoles, sulfonamide pyrazolobenzimidazoles, sulfonamide pyrazolotriazoles.

Examples include α-sulfonamide ketones and hydrazines.

By adjusting the type, amount, etc. of the reducing agent, it is possible to polymerize the polymerizable compound in either the area where the silver halide latent image is formed or the area where no latent image is formed. In addition, in a system in which a polymerizable compound is polymerized in a portion where a silver halide latent image is not formed, it is particularly preferable to use 1-phenyl-3-pyrazolidones as the reducing agent.

Regarding various reducing agents having the above functions, see Japanese Patent Application No. 60-22980, No. 60-29894, and No. 60-298.
No. 68874, No. 60-210657, No. 60-22
No. 6084, No. 60-227527, No. 60-227
Described in each specification of No. 528 and No. 61-42746 (including those described as developers or hydrazine derivatives)
There is. Regarding the above reducing agent, T. James
Author “The Theory of the Pboto
“graphic Process” 4th edition, 291-3
34 pages (1977), Research Disclosure Vol. 1.170. No. 17029, June 1978 (
9-15), and the same magazine Vol. 1.176, December 1978, No. 17643 (pages 22-31). Furthermore, as in the photosensitive material described in Japanese Patent Application No. 61-55505, a reducing agent precursor capable of releasing the reducing agent under heating conditions or in contact with a base may be used in place of the reducing agent. Good too. In the light-sensitive material of the present invention, the reducing agents and reducing agent precursors described in the above-mentioned specifications and literatures can be effectively used.

Therefore, the r-reducing agent J in this specification includes the reducing agents and reducing agent precursors described in each of the above-mentioned specifications and literatures.

These reducing agents may be used alone, but as described in the above-mentioned specification, two or more types of reducing agents may be used in combination. When two or more types of reducing agents are used together, the interaction of the reducing agents is, first, to promote the reduction of silver halide (and/or organic silver salt) through so-called superadditivity; , silver halide (
The oxidized form of the first reducing agent produced by the reduction of the first reducing agent (and/or organic silver salt) causes the polymerization of the polymerizable compound (or suppresses the polymerization) through a redox reaction with other reducing agents coexisting. ), etc. are possible. However, in actual use, the reactions described above can occur simultaneously, so it is difficult to specify which effect is occurring.

In the photosensitive layer of the photosensitive material, the reducing agent contains 1 mol of silver (
It is preferably used in an amount of 0.1 to 1500 mol % based on the silver halide described above and the optional organic silver salt.

The polymerizable compound that can be used in the photosensitive material is not particularly limited, and any known polymerizable compound can be used. In addition, when heat development treatment is planned as a method of using the photosensitive material, it is recommended to use a material with a high boiling point (for example, a boiling point of 80
℃ or higher) is preferably used. In addition, in an embodiment in which the photosensitive layer contains a color image forming substance as an optional component described later, the dye or pigment is immobilized by polymerization and curing of the polymerizable compound. A crosslinkable compound having a functional group is preferable.

Polymerizable compounds used in photosensitive materials generally have addition polymerizability or ring-opening polymerizability. Examples of the compound having addition polymerizability include compounds having an ethylenically unsaturated group, and compounds having ring-opening polymerizability include compounds having an epoxy group, and compounds having an ethylenically unsaturated group are particularly preferred.

Note that polymerizable compounds that can be used in photosensitive materials are described in the application specifications for the series of photosensitive materials described above and below.

The above polymerizable compounds may be used alone or in combination of two or more. A photographic material using a combination of two or more polymerizable compounds is described in Japanese Patent Application No. 1983-55504. Note that the above-mentioned reducing agent or a substance in which a polymerizable functional group such as a vinyl group or a vinylidene group is introduced into the chemical structure of the color image forming substance described later can also be used as the polymerizable compound of the present invention. It goes without saying that the use of a substance that functions as both a reducing agent and a polymerizable compound, or a substance that functions as a color image forming substance and a polymerizable compound as described above, is also included in the embodiments of the present invention.

In the photosensitive layer of the photosensitive material, the polymerizable compound is preferably used in an amount of 50,000 to 120,000% by weight based on 1 part by weight of silver halide. A more preferable usage range is 10 to 10,000 parts by weight.

In the following margins, various aspects of the photosensitive material, optional components that can be included in the photosensitive layer, auxiliary layers that can be optionally provided on the photosensitive material, etc. will be sequentially explained.

In the photosensitive material, it is preferable that the polymerizable compound is dispersed in the photosensitive layer in the form of oil droplets. An example of a photosensitive material in which a polymerizable compound is dispersed in the form of oil droplets in a photosensitive layer is disclosed in Japanese Patent Application No. 6
It is described in the specification of No. 0-218603. The oil droplets may contain other components in the photosensitive layer such as silver halide, reducing agents, color image forming substances, and the like. Regarding photosensitive materials containing silver halide in oil droplets, Japanese Patent Application No. 1986-
In the specification described in No. 261888 and No. 61-5751,
For photosensitive materials that further contain a reducing agent within the oil droplets,
Each of these is described in the specification of Japanese Patent Application No. 61-25577.

More preferably, the oil droplets of the polymerizable compound are in the form of microcapsules. Various known techniques can be applied to the microcapsules without particular limitations. Note that an example of a photosensitive material in which oil droplets of a polymerizable compound are in the form of microcapsules is disclosed in Japanese Patent Application No. 60-11.
It is described in the specification of No. 7089.

There are no particular restrictions on the wall material constituting the outer shell of the microcapsules.For photosensitive materials using microcapsules with outer shells made of polyamide resin and/or polyester resin, see Japanese Patent Application No. 1987-53871. Regarding a photosensitive material using microcapsules having an outer shell made of polyurea resin and/or polyurethane resin, Japanese Patent Application No. 61-53872 describes a method using microcapsules having an outer shell made of amino aldehyde resin. For photosensitive materials, patent application No. 61-538
No. 73 describes a photosensitive material using microcapsules having an outer shell made of gelatin, which is disclosed in Japanese Patent Application No. 538/1986.
No. 74 describes a patent application filed in 1983 regarding a photosensitive material using microcapsules having an outer shell made of epoxy resin.
Regarding photosensitive materials using microcapsules having a composite resin outer shell containing a polyamide resin and a polyurea resin, Japanese Patent Application No. 53877 discloses a composite resin shell containing a polyurethane resin and a polyester resin. Photosensitive materials using microcapsules having shells are described in Japanese Patent Application No. 53878/1983.

Further, when silver halide is contained in microcapsules, it is preferable that silver halide be present in the wall material constituting the outer shell of the microcapsules. A photosensitive material containing silver halide in the wall material of microcapsules is described in Japanese Patent Application No. 11556/1983.

Further, when silver halide is contained in microcapsules, it is preferable that the microcapsules contain 5 or more silver halide grains in an amount of 50% by weight or more. Regarding the photosensitive material having the above structure, please refer to the following patent application
It is described in the specification of No. 592.

Note that microcapsules on tools containing at least one of the components accommodated in the microcapsules, such as silver halide, a reducing agent, a polymerizable compound, and a color image forming substance which is an optional component described later, may be used in combination. good. In particular, when forming a full-color image, it is preferable to use three or more types of microcapsules containing different color image-forming substances in different hues. For photosensitive materials containing two or more types of microcapsules, patent application No. 61-42
It is described in the specification of No. 747.

The following optional components that can be included in the photosensitive layer of the margin photosensitive material include color image forming substances, sensitizing dyes, organic silver salts, various image formation accelerators (e.g. oils, surfactants, anti-fogging agents and / or a compound with a development accelerating function, a thermal solvent, a compound with an oxygen removal function, etc.), a thermal polymerization inhibitor,
Thermal polymerization initiators, development stoppers, fluorescent whitening agents, antifading agents, white pigments, antihalation or irradiation dyes, matting agents, antismudge agents, plasticizers, water release agents,
There are binders, solvents for polymerizable compounds, etc.

Although a polymer image can be obtained from the photosensitive material by the above-described structure of the photosensitive layer, a color image can also be formed by including a color image forming substance as an optional component in the photosensitive layer.

There are no particular restrictions on the color image-forming substance that can be used in the photosensitive material, and various types can be used. In other words, substances that themselves are colored (dyes and pigments), and substances that are colorless or light colored themselves, but are affected by external energy (heating, pressure, light irradiation, etc.) or other components (11 coloring agents). Substances that develop color upon contact (color formers) are also included in color image forming substances.

Dyes and pigments, which are substances that color themselves, are available commercially as well as in various literature (for example, "Dye Handbook" edited by the Organic Synthetic Chemistry Association, published in 1970; "Latest Pigment Handbook" edited by the Japan Pigment Technology Association; The publicly known one described in ``Published in 1972'' can be used. These dyes or pigments are used after being dissolved or dispersed.

On the other hand, examples of substances that develop color due to some kind of energy such as heating, pressure, or light irradiation include thermochromic compounds,
Piezochromic compounds, photochromic compounds, and leuco compounds such as triarylmethane dyes, quinone dyes, indigoid dyes, and azine dyes are known. All of these develop color upon heating, pressurization, light irradiation, or air oxidation.

Examples of substances that develop color upon contact with another component include various systems that develop color due to acid-base reactions, redox reactions, coupling reactions, chelate formation reactions, etc. between two or more components. For example, pressure-sensitive copying paper (pages 29-58), Azography (pages 87-
95 pages), known coloring systems such as heat-sensitive coloring by chemical changes (pages 118-120), or a preview of the seminar sponsored by the Kinki Chemical Industry Association - Latest Pigment Chemistry - Attractive Uses and New Developments as Functional Dyes - 1 Collection, pp. 26-32, (198
It is possible to use the coloring system described in June 19, 2013).

Incidentally, general photosensitive materials using color image-forming substances are described in the above-mentioned Japanese Patent Laid-Open No. 73145/1983. Further, regarding photosensitive materials using dyes or pigments as color image forming substances, see Japanese Patent Application No. 61-29987, and regarding photosensitive materials using leuco dyes, see Japanese Patent Application No. 61-29987.
53876, Japanese Patent Application No. 61-96339 for light-sensitive materials using triazene compounds, and Japanese Patent Application Nos. 133091-1988 and 133092-1988 for light-sensitive materials using yellow coloring leuco dyes.
In the specification, a photographic material using a cyan color-forming leuco dye is described in Japanese Patent Application No. 197963/1983.

In addition, when using two types of substances that cause a color reaction when in contact as the solid color image forming substance described above, one of the substances that cause a color reaction and a polymerizable compound are contained in microcapsules. However, a color image can be formed on the photosensitive layer by allowing other substances among the substances that cause the color-forming reaction to exist outside the microcapsules containing the polymerizable compound. Regarding photosensitive materials that can obtain color images without using an image-receiving material as mentioned above,
It is described in the specification of Japanese Patent Application No. 61-53881.

The sensitizing dye that can be used in the light-sensitive material is not particularly limited, and silver halide sensitizing dyes known in the photographic technology can be used. The above-mentioned sensitizing dyes include methine dyes, cyanine dyes, merocyanine dyes, complex cyanine dyes, holopolar cyanine dyes, hemicyanine dyes,
Includes styryl dyes and hemioxonol dyes. These sensitizing dyes may be used alone or in combination. Particularly when the purpose is supersensitization, it is common to use a combination of sensitizing dyes. In addition, along with the sensitizing dye, a dye that itself does not have a spectral sensitizing effect, or a substance that does not substantially absorb visible light but exhibits supersensitization may be used in combination.The amount of the sensitizing dye added is as follows: Generally from 10-8 to 10-1 per mole of silver halide.
It is about 2 moles. The sensitizing dye is preferably added at the stage of preparing the silver halide emulsion. Regarding a light-sensitive material obtained by adding a sensitizing dye at the stage of forming silver halide grains, Japanese Patent Application No. 139746/1984 describes that the sensitizing dye is added to a silver halide emulsion after the formation of silver halide grains. The photosensitive materials obtained by adding the above in the preparation stage are described in Japanese Patent Application No. 55510/1983. Further, specific examples of sensitizing dyes that can be used in light-sensitive materials are also disclosed in the above-mentioned patent application No. 13974/1986.
The use of organic silver salts in photosensitive materials as described in No. 6 and No. 61-55510 is particularly effective in thermal development processing. That is, when heated to a temperature of 80° C. or higher, the organic silver salt is considered to participate in an oxidation-reduction reaction using the latent image of silver halide as a catalyst. In this case, the silver halide and the organic silver salt are preferably in contact or in close proximity. Examples of the organic compound constituting the organic silver salt include aliphatic or aromatic carboxylic acids, thiocarbonyl group-containing compounds having a mercapto group or α-hydrogen, and imino group-containing compounds. Among them, benzotriazole is particularly preferred. The above organic silver salt is generally 0.01 to 10 mol per mol of silver halide, preferably 0.01 to 10 mol, preferably 0.01 to 10 mol per mol of silver halide. Ol
Use 1 to 1 mole. Note that the same effect can be obtained by adding an organic compound (for example, benzotriazole) constituting the organic silver salt to the photosensitive layer instead of the organic silver salt. A photosensitive material using an organic silver salt is described in Japanese Patent Application No. 141799/1982.

Various image formation accelerators can be used in the photosensitive layer of the photosensitive material. The image formation promoter has functions such as promoting the redox reaction between silver halide (and/or organic silver salt) and a reducing agent, and promoting the transfer of dyes or pigments from the light-sensitive material to the image-receiving material. There is. The image formation accelerator is
In terms of physicochemical functions, they are further classified into bases or base precursors, oils, surfactants, compounds with antifogging and/or development accelerating functions, thermal solvents, compounds with oxygen removal functions, and the like.

However, these substance groups generally have multiple functions and usually have some of the above-mentioned promoting effects. Therefore, the above classification is for convenience, and in reality, one compound often has multiple functions.

A photographic material using a base or a base precursor is described in Japanese Patent Application No. 227528/1982.

Regarding photosensitive materials using tertiary amines as bases, Japanese Patent Application No. 13181/1981 describes materials with melting points of 80-18.
Regarding a photosensitive material using a fine particle dispersion of a hydrophobic organic base compound at 0°C, see Japanese Patent Application No. 61-52992, and about a photosensitive material using an alkali metal or alkaline earth metal hydroxide or salt. Patent application No. 61-9634
In the specification of No. 1, for a photosensitive material using a guanidine derivative with a solubility of 0.1% or less, Japanese Patent Application No. 61-21563 is disclosed.
Specification No. 7 contains the respective descriptions.

A photosensitive material using acetylene silver as a base precursor is described in Japanese Patent Application No. 167558/1982. Further, regarding photosensitive materials that use acetylene carboxylate as a base precursor and further contain metallic silver, metallic copper, a silver compound, or a copper compound as a decomposition accelerator for the base precursor, see Japanese Patent Application No. 1981-191000. For photosensitive materials that use acetylene carboxylate as a base precursor and further contain a heat-melting compound as a decomposition accelerator for the base precursor, there is a patent application filed in 1983.
Japanese Patent Application No. 193375/1983 describes a photographic material using a sulfonylacetate as a base precursor and a heat-melting compound as a decomposition accelerator for the base precursor.

When using a base or base precursor in a photosensitive material,
It is preferable that silver halide, a reducing agent, and a polymerizable compound are contained in the microcapsules described above, and a base or a base precursor is present in the photosensitive layer outside the microcapsules. Or, patent application No. 61-5298
In addition to the above-mentioned specification, photosensitive materials using microcapsules containing a base or base precursor, such as the photosensitive material described in No. 8, in which the base or base precursor may be accommodated in another microcapsule, include: A photosensitive material in which a base or a base precursor is dissolved or dispersed in an aqueous solution of a water retention agent and housed in a microcapsule is disclosed in Japanese Patent Application No. 61-52989. A photographic material containing a basic compound having a melting point of 70 to 210° C. is disclosed in Japanese Patent Application No. 61-21214.
They are described in Specification No. 8, respectively. The base or base precursor may be added to an auxiliary layer other than the photosensitive layer (a layer containing a base or base precursor described later) as described in Japanese Patent Application No. 61-96340.

A photosensitive material using an antifoggant as a compound having an antifogging function and/or a development accelerating function is described in Japanese Patent Application No. 60-294337, and a photosensitive material using a compound having a cyclic amide structure is described in a patent application. 1986
For photosensitive materials using thioether compounds, see Japanese Patent Application No. 60-294339, and for photosensitive materials using polyethylene glycol derivatives, see Japanese Patent Application No. 60-294340. Regarding photosensitive materials using
94341, a photosensitive material using an acetylene compound is described in Japanese Patent Application No. 61-20438, and a photosensitive material using a sulfonamide derivative is described in Japanese Patent Application No. 61-25578. . In addition, for photosensitive materials using a compound having two or more mercapto groups as a compound having an oxygen removal function,
This is described in Japanese Patent Application No. 1988-53880.

A thermal polymerization initiator that can be used in the photosensitive layer of a photosensitive material is generally a compound that thermally decomposes under heating to generate polymerization initiating species (particularly radicals), and is usually used as an initiator for radical polymerization. be. Regarding thermal polymerization initiators, please refer to “Addition Polymerization and
"Ring-Opening Polymerization" (1983, Heme Publishing), pages 6 to 18, etc. The thermal polymerization initiator is preferably used in an amount of 0.1 to 120% by weight, more preferably 1 to 10% by weight, based on the polymerizable compound. In addition, in a system in which a polymerizable compound is polymerized in a portion where a silver halide latent image is not formed, it is preferable to add a thermal polymerization initiator to the photosensitive layer. In addition, regarding photosensitive materials using thermal polymerization initiators, patent application No. 60-2
It is described in the specification of No. 10657.

Development stoppers that can be used in photosensitive materials are compounds that neutralize the base or react with the base to reduce the base concentration in the film and stop development immediately after proper development, or compounds that interact with silver and silver salts to stop development. A compound that inhibits development.

The anti-smudge agent used in photosensitive materials is preferably a particulate material that is solid at room temperature.The average particle size of the particles is preferably in the range of 3 to 50 gm in terms of volume average diameter, and more preferably in the range of 5 to 40 gm. Preferably, when the oil droplets of the polymerizable compound are in the form of microcapsules as described above, it is more effective if the particles are larger than the microcapsules.

Binders that can be used in photosensitive materials and image-receiving materials described below can be contained in the photosensitive layer or image-receiving layer, either singly or in combination. It is preferable to use a mainly hydrophilic binder. Regarding photosensitive materials using binders, Japanese Patent Application Laid-Open No. 61-6906
There is a description in Publication No. 2. In addition, regarding photosensitive materials using binders together with microcapsules, a patent application filed in 1983
It is described in the specification of No.-52994. The binder is similar to the binder that can be used in the image-receiving material described above. Incidentally, a photosensitive material using a binder is described in JP-A-61-69062. Further, a photosensitive material using a binder together with microcapsules is described in Japanese Patent Application No. 1983-52994.

When a solvent for a polymerizable compound is used in a photosensitive material, it is preferable to encapsulate it in a microcapsule separate from the microcapsule containing the polymerizable compound. Regarding photosensitive materials using organic solvents that are miscible with polymerizable compounds encapsulated in microcapsules, Japanese Patent Application No. 5299/1986
It is stated in the specification of No. 3.

In addition to those mentioned above, examples of optional components that can be included in the photosensitive layer and how they are used can also be found in the application specifications related to the above-mentioned series of photosensitive materials and Research Disclosure Magazine Vol.

No. 17029, June 1978 (pages 9-15). In addition, the PH value of the photosensitive layer is as specified in the patent application 1986-
It is preferable to set it to 7 or less as in the photosensitive material described in No. 104226.

Layers that can be optionally provided on the photosensitive material include an image-receiving layer, a heating layer, an antistatic layer, an anti-curl layer, a peeling layer,
Mention may be made of cover sheets or protective layers, layers containing bases or base precursors, base barrier layers, and the like.

Instead of using the image-receiving material described later as a method of using the photosensitive material, an image-receiving layer may be provided on the photo-sensitive material and an image may be formed on this layer. It can be configured similarly to. Details of the image receiving layer will be described later.

For photosensitive materials using a heating layer, a patent application filed in 1986
For photosensitive materials provided with a cover sheet or a protective layer, see Japanese Patent Application No. 61-55507, and for photosensitive materials provided with a layer containing a base or base precursor, see Japanese Patent Application No. 61-96340. They are described in the respective specifications. Further, the base barrier layer is also described in the above-mentioned Japanese Patent Application No. 61-96340. Furthermore, examples of other auxiliary layers and their usage are also described in the applications relating to the above-mentioned series of light-sensitive materials.

Margin below The method for manufacturing the photosensitive material will be described below.

Various methods can be used to manufacture photosensitive materials, but the general manufacturing method is to prepare a coating solution by dissolving, emulsifying, or dispersing the components of the photosensitive layer in an appropriate solvent, and then coating. This process consists of applying a liquid onto a support and drying it to obtain a photosensitive material.

Generally, the above-mentioned coating liquid is prepared by preparing a liquid composition containing each component and then mixing the respective liquid compositions. The above-mentioned liquid composition may be prepared individually for each component or may be prepared to contain a plurality of components. It can also be used by adding at a stage or after preparation. Furthermore, as described below, a method of preparing a secondary composition by further emulsifying an oil-based (or aqueous) composition containing the components on the tool in an aqueous (or oil-based) solvent can also be used. .

Regarding the main components contained in the photosensitive layer, methods for preparing a liquid composition and a coating solution are shown below.

In the production of light-sensitive materials, silver halide is preferably prepared as a silver halide emulsion. There are various methods known in the photographic technology for preparing silver halide emulsions, but there are no particular limitations on the production of the light-sensitive material of the present invention. Silver halide emulsions can be prepared using any of the acid method, neutral method, and ammonia method.

The reaction format between soluble silver salt and soluble halogen salt is 1
Either one side mixing method, simultaneous mixing method or a combination thereof may be used. A back-mixing method in which particles are mixed under conditions of excess silver ions and a Chondrold double-jet method in which PAg is kept constant can also be employed. In addition, l\silver chloride emulsion is
It may be a surface latent image type where the latent image is mainly formed on the particle surface, or an internal latent image type where the latent image is formed inside the particle. Direct reversal emulsions combining internal latent image type emulsions and nucleating agents can also be used.

In the preparation of silver halide emulsions used in the production of light-sensitive materials, it is preferable to use a wood-philic colloid (eg, gelatin) as a protective colloid. By preparing a silver halide emulsion using a wood-philic colloid, the sensitivity of a light-sensitive material produced using this emulsion is improved. In the silver halide emulsion, a silver halide solvent can be used in the stage of forming silver halide grains. Further, in the process of particle formation or physical ripening, cadmium salt, zinc salt, lead salt, thallium salt, etc. may be allowed to coexist. Furthermore, a water-soluble iridium salt or a water-soluble rhodium salt can be used for the purpose of improving high-light-intensity failure and low-light-intensity failure.

The soluble salts may be removed from the silver halide emulsion after precipitation or physical ripening. In this case, it can be carried out according to the Tardel water washing method or the sedimentation method. Although the silver halide emulsion may be used without post-ripening, it is usually used after being chemically sensitized.

In emulsions for conventional sensitive materials, known sulfur sensitization methods, reduction sensitization methods, noble metal sensitization methods, etc. can be used alone or in combination.

In addition, when adding a sensitizing dye to a silver halide emulsion,
Patent Application No. 139746/1986 and 61-5 mentioned above
It is preferable to add it at the stage of preparing a silver halide emulsion as in the photographic material described in No. 5510. In addition, when adding a nitrogen-containing heterocyclic compound as a compound having the above-mentioned antifogging function and/or development accelerating function, it should be added during the formation stage or ripening stage of silver halide grains in the preparation of a silver halide emulsion. is preferred. A method for producing a photosensitive material in which a nitrogen-containing heterocyclic compound is added at the stage of forming or ripening silver halide grains is described in Japanese Patent Application No. 3024/1983.

When the organic silver salt described above is included in the photosensitive layer, the organic silver salt emulsion can be prepared by a method similar to the method for preparing the silver halide emulsion described above.

In the production of photosensitive materials, the polymerizable compound can be used as a medium in preparing the composition of other components in the photosensitive layer. For example, silver halide (including silver halide emulsions), reducing agents, color image forming substances, etc. can be dissolved, emulsified or dispersed in a polymerizable compound and used in the production of photosensitive materials. In particular, it is preferable that the color image forming substance is contained in a polymerizable compound. Furthermore, as will be described later, when the oil droplets of the polymerizable compound are microencapsulated, components such as a wall material necessary for microencapsulation may be included in the polymerizable compound.

A photosensitive composition containing silver halide in a polymerizable compound can be prepared using a silver halide emulsion. In addition to the silver halide emulsion, silver halide powder prepared by freeze-drying or the like can also be used to prepare the photosensitive composition.

Photosensitive compositions containing these silver halides can be obtained by stirring with a homogenizer, blender, mixer, or other commonly used stirrers.

In addition, it is preferable that a copolymer consisting of a hydrophilic repeating unit and a hydrophobic repeating unit is dissolved in the polymerizable compound used for preparing the photosensitive composition. Regarding the photosensitive composition containing the above copolymer, Japanese Patent Application No. 1986-
It is described in the specification of No. 261887.

Further, instead of using the above copolymer, a photosensitive composition may be prepared by dispersing microcapsules having a silver halide emulsion as a core material in a polymerizable compound. A photosensitive composition containing microcapsules having the above-mentioned silver halide emulsion as a core material is described in Japanese Patent Application No. 1983-5750.

It is preferable to use the polymerizable compound (including those containing other constituent components like the above photosensitive composition) in the form of an emulsion in an aqueous solvent. Also, a special request in 1986
When oil droplets of a pentapolymerizable compound are microencapsulated as in the photosensitive material described in No. 117089, a wall material necessary for microencapsulation is added to the emulsion, and the outside of the microcapsules is A shell-forming treatment can also be carried out at this emulsion stage. Further, a reducing agent or other optional components may be added at the stage of the emulsion.

Regarding photosensitive microcapsules that can be used in the production of photosensitive materials, Japanese Patent Application No. 61-11556,
No. 61-11557, No. 61-53871, No. 61
-53872, 61-53873, 61-53
No. 874, No. 61-53875, No. 61-53877
No. 61-53878.

Among the above-mentioned emulsions of polymerizable compounds (including microcapsule liquids subjected to microencapsulation treatment), if the polymerizable compound is a photosensitive composition containing silver halide, it can be directly used as a coating solution for photosensitive materials. It can be used as Emulsions other than those mentioned above can be mixed with a composition of other components such as a silver halide emulsion and optionally an organic silver salt emulsion to prepare a coating solution. It is also possible to add other components at the stage of this coating solution in the same manner as in the case of the emulsion described above.

The photosensitive material of the present invention can be produced by applying the coating solution prepared as described above onto the above-mentioned support and drying it. ] The coating liquid described in 2 above can be easily applied to the support according to known techniques.

An image forming method using a photosensitive material will be described below.

The photosensitive material can be used simultaneously with imagewise exposure or after imagewise exposure.
Perform development processing and use.

Although various exposure means can be used as the above-mentioned exposure method, a latent image of silver halide is generally obtained by imagewise exposure to radiation including visible light. The type of light source and amount of exposure
Sensitive wavelength of silver halide (if dye sensitization is performed,
It can be selected depending on the sensitized wavelength) and sensitivity. Further, the original image may be a black and white image or a color image.

The photosensitive material is developed at the same time as the imagewise exposure or after the imagewise exposure. The photosensitive material was published under the Special Publication Act in 1977-111.
Development processing using a developer described in Publication No. 49 etc. may be performed. Furthermore, as mentioned above, since the method described in Japanese Patent Application Laid-open No. 61-69062, which involves heat development processing, is a dry process. , it has the advantage of being easy to operate and can be processed in a short time. Therefore, the development process for photosensitive materials is as follows:
The latter is especially good.

As the heating method in the above heat development treatment, various conventionally known methods can be used. Further, as in the photosensitive material described in the above-mentioned Japanese Patent Application No. 135568/1980, a heat generating layer may be provided on the photosensitive material and used as a heating means. Further, as in the image forming method described in Japanese Patent Application No. 61-55506, heat development may be carried out while suppressing the amount of oxygen present in the photosensitive layer, and the heating temperature is generally 80°C to 80°C. 200°C, preferably 100°C to 1
The temperature is 60°C. The heating time is generally 1 second to 5 minutes.
Preferably it is 5 seconds to 1 minute.

The photosensitive material can be thermally developed as described above to polymerize the polymerizable compound in the area where the silver halide latent image is formed or the area where the silver halide latent image is not formed. In light-sensitive materials, the polymerizable compound in the area where the latent image of silver halide is generally polymerized in the heat development process described above.
As in the photosensitive material described in No. 210657, by adjusting the type, amount, etc. of the reducing agent, it is also possible to polymerize the polymerizable compound in the area where the silver halide latent image is not formed.

In the manner described above, a polymer image can be obtained on the photosensitive layer. A dye image can also be obtained by fixing dyes or pigments to the polymer.

When the photosensitive material is constructed like the photosensitive material described in the above-mentioned Japanese Patent Application No. 81-53881, the developed photosensitive material is pressurized to destroy the microcapsules containing the color image forming substance. A color image can be formed on a light-sensitive material by bringing a color image-forming substance into contact with an acidic color developer and a coupler.

However, in an image forming method using a photosensitive material, it is preferable to use an image-receiving material in combination to form an image on the image-receiving material.

The image-receiving material will be explained below. The general image forming method using an image-receiving material or an image-receiving layer is described in Japanese Patent Application No. 121284/1984.

Materials that can be used for the support of the image-receiving material include:
Glass, paper, fine paper, coated paper, cast coated paper, baryta paper, synthetic paper, metals and their analogs, polyester, acetyl cellulose.

Examples include films of cellulose ester, polyvinyl acetal, polystyrene, polycarbonate, polyethylene terephthalate, etc., and papers laminated with resin materials and polymers such as polyethylene. Note that when a porous material such as paper is used as the support for the image-receiving material, it is preferable that it has a certain level of smoothness as in the image-receiving material described in Japanese Patent Application No. 61-52990. . Further, an image receiving material using a transparent support is described in Japanese Patent Application No. 1981-52991.

Image-receiving materials generally have an image-receiving layer provided on a support.

The image-receiving layer can be constructed in any desired form using various compounds according to the coloring system of the color image-forming substance described above. In addition, when forming a polymeric image on an image-receiving material, when a dye or a pigment is used as a color image-forming substance, the image-receiving material may be composed only of the above-mentioned support.

For example, when using a coloring system consisting of a color former and a color developer, the image receiving layer can contain the color developer. Further, the image-receiving layer can also be configured as a layer containing at least one mordant. The mordant can be selected from compounds known in the photographic technology, taking into consideration conditions such as the type of color image forming substance, and used. Note that, if necessary, two or more image-receiving layers may be constructed using a plurality of mordants having different mordant powers.

The image-receiving layer preferably contains a polymer as a binder. As the binder, binders that can be used in the photosensitive layer of the photosensitive material described above can be used. Further, as in the image-receiving material described in Japanese Patent Application No. 61-53879, a polymer with low oxygen permeability may be used as the binder.

For the image receiving layer, Japanese Patent Application No. 61-124952 and No. 61
Fine particles of a thermoplastic compound may be included, as in the image-receiving material described in -124953. Furthermore, a white pigment such as titanium dioxide may be added to the image-receiving layer so that the image-receiving layer functions as a white reflective layer. Furthermore, a photopolymerization initiator or a thermal polymerization initiator may be added to the image-receiving layer for the purpose of polymerizing unpolymerized polymerizable compounds. Regarding an image receiving material having an image receiving layer containing a photopolymerization initiator, Japanese Patent Application No. 6
Japanese Patent Application No. 1-3025 describes an image-receiving material having an image-receiving layer containing a thermal polymerization initiator.

Note that when the image-receiving layer is located on the surface of the image-receiving material, it is preferable to further provide a protective layer. Also, the special application 1986-
As in the image-receiving material described in No. 55503, a layer made of aggregates of fine particles of a thermoplastic compound may be provided on the image-receiving layer.

The photosensitive material is developed as described above, and by pressing the image-receiving material in a stacked state, the unpolymerized polymerizable compound is transferred to the image-receiving material, and a polymer image can be obtained on the image-receiving material. can. Regarding the above pressurizing means,
Various conventionally known methods can be used.

Further, in an embodiment in which the photosensitive layer contains a color image forming substance,
By performing a similar development treatment, the polymerizable compound is polymerized and cured, thereby immobilizing the color image forming substance in the cured portion. By pressing the photosensitive material and the image-receiving material in a superimposed state, the uncured portion of the color image-forming substance is transferred to the image-receiving material, and a color image can be obtained on the image-receiving material.

After forming an image on the image-receiving material as described above, the image-receiving material may be heated as in the image forming method described in Japanese Patent Application No. 61-55501. The above method has the advantage that the unpolymerized polymerizable compound transferred onto the image-receiving material is polymerized, and the storage stability of the obtained image is improved.

The present applicant has already filed patent applications for various image recording apparatuses suitable for carrying out the above-described series of image forming methods using photosensitive materials. Typical of these devices are an exposure device that forms a latent image by imagewise exposure, a heat development device that hardens and immobilizes the portion corresponding to the formed latent image, and a developed photosensitive device that A transfer device that superimposes an image-receiving material on a material and presses them (Japanese Patent Application No. 60-289703);
and a structure in which a fixing device is further added to the above structure to irradiate, pressurize, or heat the image-receiving material onto which the image has been transferred (Japanese Patent Application No. 60-2897
No. 03 Specification).

Photosensitive materials include black and white or color photography and printing photosensitive materials, printing photosensitive materials, printing plates, X-ray photosensitive materials, medical photosensitive materials (for example, ultrasonic diagnostic CRT photosensitive materials), computer graphic hard copy photosensitive materials, It has many uses, such as photosensitive materials for copying machines.

The present invention will be explained in more detail with reference to the following examples, but the present invention is not limited thereto.

[Example 1] Preparation of paper support (a) 70 parts of LBKP and 30 parts of NBKP were beaten to a freeness (C3F) of 350 cc using a double disc refinery, and 1.5 parts of rosin size, 5.0 parts of talc and sulfuric acid were added. 2.0 parts of band was added in a bulb bone dry weight ratio. Next, the above paper stock was made into paper using a Fourdrinier paper machine and dried using a Yanki dryer to obtain a sheet of paper having a basis weight of 71 g/m2. The above glossy paper was subjected to supercalendering, and the obtained paper was used as a base paper for a paper support.

In addition, the moisture content of the base paper in the above supercalendering was 7.5%, the roll temperature was 75°C, and the roll pressure was 200°C.
kg/cm.

The Beck smoothness of the surface of the base paper (dryer surface) was 243 seconds, and the Beck smoothness of the back surface of the base paper was 154 seconds.

On the surface of the base paper prepared as above, 100 parts of SBR latex, 4100 parts of comb, 100 parts of calcium carbonate,
and 2.4 to 2 parts of dichloro-6-hydroxy-5-) riazine sodium salt at a coating amount of 1
The coating was applied at a rate of 5 g/rr1' to obtain a paper support (a).

Preparation of silver halide emulsion A gelatin aqueous solution (containing 20 g of gelatin and 3 g of sodium chloride in 10,100 O of water and keeping it at 75°C) is mixed with a 600 mM aqueous solution containing 21 g of sodium chloride and 56 g of potassium bromide and a silver nitrate aqueous solution ( water 600m
0.59 mol of silver nitrate was dissolved at the same time.
Added at equal flow rate over 0 min. In this way, a monodisperse cubic silver chlorobromide emulsion (80 mol % bromine) with an average grain size of 0.35 gm was prepared.

After washing the emulsion with water to desalt it, 5 mg of sodium thiosulfate and 4-hydroxy-6-methyl-1,3,3
a, by adding 20 mg of 7-chitrazaindene to 6
Chemical sensitization was performed at 0°C. The yield of emulsion was 600 g.

Preparation of benzotriazole silver emulsion 28 g of gelatin and 13.2 g of benzotriazole are mixed with 3 ml of water.
000 ml. This solution was stirred while being maintained at 40°C, and a solution of 17 g of silver nitrate dissolved in 100 mJl of water was added over 2 minutes.

Excess salt was precipitated and removed by adjusting the pH of the resulting emulsion. Thereafter, the pH was adjusted to 6.30 to obtain a benzotriazole silver emulsion. The yield of emulsion was 400 g.

Preparation of photosensitive composition Add 0.40 g of the following copolymer, 6.00 g of Vargas Script Red 1-6-B (manufactured by Ciba Geigy), and 2 g of Emmalex NP-8 (manufactured by Nippon Emulsion ■) to a long trimethylolpropane triacrylate. Dissolved.

0.00 g of the following thiol derivative to 18.00 g of the above solution
2g was dissolved. To this solution was further added a solution in which 0.16 g of the following hydrazine derivative (reducing agent) and 1.22 g of the following developing agent (reducing agent) were dissolved in 1.80 g of methylene chloride. Furthermore, 3.50 g of silver halide emulsion prepared as described above, and benzotriazole silver emulsion 3
．． Add 35g and use a homogenizer to
The mixture was stirred at 0.00 rpm for 5 minutes to obtain a photosensitive composition.

(Copolymer) GO20H2(H2N(GH3) 2 GO2
0H3H3 +cH2-C)-26 ■ C(hcsHq (thiol derivative) (hydrazine derivative) 2H5 (developer) 18.6% aqueous solution of isopane (manufactured by Kuraray Corp.) 10.51
g, add 48.56 g of a 2.89% aqueous solution of pectin,
The above photosensitive composition was added to an aqueous solution adjusted to pH 4.0 using 10% sulfuric acid, and heated to 70% using a homogenizer.
The photosensitive composition was stirred at 0.00 rpm for 2 minutes to emulsify it in the aqueous solvent.

To 72.5 g of this aqueous emulsion, 8.32 g of urea 40% aqueous solution was added.
g, resorcinol 11.3% aqueous solution 2°82g, formalin 37% aqueous solution 8.56g, ammonium sulfate 8.0θ
% aqueous solution 3. OOg was added one after another, and heating was continued at 60° C. for 2 hours while stirring. Thereafter, the pH was adjusted to 7.3 using a 10% aqueous sodium hydroxide solution, and 3.62 g of a 30.9% aqueous solution of sodium hydrogen sulfite was added.
A cell solution was prepared.

Preparation of photosensitive material (A) 10.0 g of microcapsule liquid prepared as above
1.0 g of the following 1% aqueous anionic surfactant solution, 10% guanidine trichloroacetate (water/ethanol =
50750 volume ratio) solution was added to the surface of the paper support (a) prepared as described above (the side on which the coating layer was provided).
Using a #40 coating rod, apply approximately 40
The photosensitive material (A) according to the present invention was prepared by drying at ℃.

(Anionic surfactant) CHzCOOCH2-CI(CzHs)CsH9Na0
3S-CI-COOCH? -0H(CzHs)C4H9
[Example 2] Preparation of paper support (b) 90 parts of LBKP and NBSPIO parts were beaten to a freeness (C3F) of 330 CC using a conical refinery, and 5.0 parts of calcium carbonate, 1.0 part of cationic starch, and alkyl 0.2 part of ketene dimer and 0.1 part of polyamide polyamine epichlorohydrin were added in the absolute dry weight ratio of the pulp. Next, the above paper stock was made into paper using a Fourdrinier paper machine and dried using a Yanki dryer to obtain glossy paper with a basis weight of 70 g/IT1'. The above glossy paper was subjected to supercalendering, and the obtained paper was used as a base paper for a paper support.

In addition, the moisture content of the base paper in the above supercalendering was 6.8%, the roll temperature was 80°C, and the roll pressure was 210°C.
kg/cm.

In addition, the Beck smoothness of the base paper surface (dryer surface) is 36
2 seconds, and the Beck smoothness of the back side of the base paper was 175 seconds.

Calcium carbonate 1
A composition consisting of 00 parts, clay 100 parts, SBR latex 100 parts and maleated petroleum resin 80 parts was applied so that the coating amount was Log/m2, and the paper support (b)
I got it.

Preparation of photosensitive material (B) Except for using the paper support (b) prepared as described above,
A photosensitive material (B) according to the present invention was prepared in the same manner as in Example 1.

[Example 3] Preparation of paper support (C) On the back side (the side opposite to the Yankee dryer side) of the glossy paper obtained in the preparation of paper support (b) in Example 2,
Using an air knife coater, a composition consisting of 4 parts of calcium carbonate and 1 part of SDR latex was coated with 0.5 parts of chlorohydrin at a coating amount of 1.5 g/g.Next, a coating layer was formed on the back side. The tape and paper were subjected to supercalendering, and the resulting paper was used as a base paper for a paper support.

In addition, the water content of the base paper in the above supercalendering was 7.9%, the roll temperature was 80°C, and the roll pressure was 190°C.
kg/cm.

In addition, the Beck smoothness of the base paper surface (dryer surface) is 35
3 seconds, and the Beck smoothness of the back side of the base paper was 201 seconds.

Calcium carbonate 1
A paper support (C) was obtained by applying a composition consisting of 0.00 parts, 100 parts of clay, 100 parts of SBR latex, and 80 parts of maleated petroleum resin at a coating amount of 10 g/g.

Preparation of photosensitive material (C) Except for using the paper support (C) prepared as described above.
A photosensitive material (C) according to the present invention was prepared in the same manner as in Example 1.

[Example 4] Creation of paper support (d) The glossy paper obtained in the production of paper support (a) in Example 1 (before supercalendering) was used as it was as a base paper for the paper support. did.

Beck smoothness of the base paper surface (dryer surface) is 243 seconds,
The Beck smoothness of the back surface of the base paper was 21 seconds.

Calcium carbonate 1
A composition consisting of 00 parts of clay, 100 parts of SBR latex, and 80 parts of maleated petroleum resin was applied to the paper support (d
) was obtained.

Preparation of photosensitive material CD) Except for using the paper support (d) prepared as above,
A photosensitive material (D) according to the present invention was prepared in the same manner as in Example 1.

[Comparative Example 1] Creation of paper support (X) The paper stock used in the production of paper support (a) in Example 1 was made using a Fourdrinier paper machine, and dried using a multi-barrel dryer. As a result, a high-quality paper with a basis weight of 71 g/rn' was obtained. The obtained high-quality paper was used as a base paper for a paper support.

The Beck smoothness of the surface of the base paper (dryer surface) was 72 seconds, and the Beck smoothness of the back surface of the base paper was 58 seconds.

Calcium carbonate 1
00 parts, 100 parts of clay, and 10 parts of SBR latex
A paper support (X) was obtained by applying a composition consisting of 0 parts in an amount of tog/g.

Preparation of photosensitive material (X) Except for using the paper support (X) prepared as described above,
A comparative photosensitive material (X) was prepared in the same manner as in Example 1.

Comparative Example 21 Preparation of Paper Support (y) The high-quality paper obtained in the preparation of the paper support (X) of Comparative Example 1 was subjected to supercalendering, and the obtained paper was used as a base paper for the paper support.

In addition, the moisture content of the base paper in the above supercalendering was 6.9%, the roll temperature was 75°C, and the roll pressure was 190°C.
kg/cm-t'.

In addition, the Beck smoothness of the base paper surface (dryer surface) is 14
1 second, and the Bekk smoothness of the back side of the base paper was 118 seconds.
00 parts, 100 parts of clay, and 10 parts of SBR latex
A paper support (y) was obtained by applying the composition consisting of 0 parts at a coating amount of 10 g/rn''.

Preparation of photosensitive material (Y) Except for using the paper support (y) prepared as described above,
A comparative photosensitive material (Y) was prepared in the same manner as in Example 1.

[Comparative Example 3] Preparation of paper support (Z) The paper stock used in the preparation of paper support (b) in Example 2 was made using a Fourdrinier paper machine, and dried using a multi-barrel dryer. As a result, a high-quality paper with a basis weight of 71 g/m2 was obtained. The obtained high-quality paper was used as a base paper for a paper support.

Beck smoothness of the base paper surface (dryer surface) is 108 seconds,
The Beck smoothness of the back surface of the base paper was 98 seconds.

Calcium carbonate 1
00 parts, 100 parts of clay, and 10 parts of SBR latex
A paper support (2) was obtained by applying the composition consisting of 0 parts at a coating amount of 10 g/rn'.

Preparation of photosensitive material (Z) Except for using the paper support (2) prepared as above,
A comparative photosensitive material (Z) was prepared in the same manner as in Example 1.

Preparation of image-receiving material 11 g of 40% sodium hexametaphosphate aqueous solution was added to 125 g of water, and 34 g of zinc 3,5-di-α-methylbenzylsalicylate and 82 g of 55% calcium carbonate slurry were mixed and coarsely dispersed with a mixer. . The liquid was dispersed using a Dyno Mill splitter, and 6 g of 50% SBR latex and 55 g of 8% polyvinyl alcohol were added to 200 g of the resulting liquid and mixed uniformly. Next, this mixed solution was uniformly applied to the surface of the cast coated paper so as to have a wet film thickness of 30 pLm, and then dried to prepare an image receiving material.

Evaluation of Photosensitive Materials Each of the photosensitive materials obtained in Examples 1 to 4 and Comparative Examples 1 to 3 was uniformly exposed for 1 second at 60 lux using a tungsten bulb, and then heated for 40 seconds on a hot plate heated to 125°C. did. Next, a pressure roller of 250 kg/C and a pressure roller of 700
The degree of transfer unevenness was visually evaluated for the magenta positive color image obtained from each photosensitive material onto the image receiving material by passing it through a pressure roller of kg/c.

The above measurement results are shown in Table 1 below.

However, each value shown in the column rPressure 1 in Table 1 indicates the number of transfer unevenness that exists per 1 crn' of color image at each transfer pressure, and rDry 1 indicates the drying of wet paper. The types of dryers used are rYJ and rMl, respectively, meaning Yankee dryer and multi-barrel dryer. r
Calendar J indicates whether or not supercalendering was performed during the production of the base paper of the paper support.

Below margin 1st surface Photosensitive paper support Dry smoothness Pressure (kg/ctn
') Material Special holiday Dry Front Back Cedar 250 70
0(A) (a) Y 290154 50~1oo2
o~3゜(B) (b) Y 362175 50~1
0020～3゜(C) (c) Y 353201 Yes 2
0~305~1゜(D) (d) Y 243 21
None 300 or more 50-100 (X) (x)M
72 58 None 300 or more 300 or more (Y) (
V) M 141118 Yes 300 or more 200-30
0(Z) (z) M 108 9B None 300 or more 200-300 As is clear from the results shown in Table 1, when the photosensitive material according to the present invention is used, the occurrence of transfer unevenness can be significantly reduced. Furthermore, it can be seen that the effect is particularly remarkable in the photosensitive material using a paper support prepared by using a heated mirror dryer and a supercalender treatment in combination.

Claims (1)

[Scope of Claims] 1. A photosensitive material comprising a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound provided on a paper support, wherein the photosensitive layer of the base paper of the paper support is provided. The surface on which the paper is attached is a smooth surface with a Bekk smoothness of 200 seconds or more as defined by JIS-P-8119, and the base paper of the paper support has one side of the wet paper in close contact with a heated mirror dryer. A photosensitive material characterized by being a glossy paper obtained by drying. 2. The heating temperature of the dryer is 100℃ to 200℃
The photosensitive material according to claim 1, characterized in that: 3. The photosensitive material according to claim 1, wherein the Bekk smoothness is 250 seconds or more. 4. A patent characterized in that the surface of the base paper of the paper support on which the photosensitive layer is not provided is a smooth surface with a Beck smoothness of 100 seconds or more as defined by JIS-P-8119. A photosensitive material according to claim 1. 5. 60% by weight of the pulp constituting the paper support
2. The photosensitive material according to claim 1, wherein the above material is hardwood pulp. 6. The photosensitive material according to claim 1, wherein the pulp constituting the paper support is a pulp having a freeness defined by CSF of 200 to 400 cc. 7. The photosensitive material according to claim 1, wherein the paper support has a thickness of 250 μm or less. 8. The base paper of the paper support is a glossy paper obtained by drying one side of the wet paper in close contact with a heated mirror dryer and then subjecting it to supercalender treatment. The photosensitive material according to item 1. 9. The photosensitive material according to claim 1, wherein the paper support is formed by providing a coating layer containing a hydrophobic polymer on a base paper. 10. A patent claim characterized in that the surface of the paper support on which the photosensitive layer is provided has a cup water absorption of 3 g/m^2 or less as defined by JIS-P-8140. A photosensitive material according to scope 1. 11. The photosensitive material according to claim 1, wherein the photosensitive layer further contains a color image forming substance. 12. The photosensitive material according to claim 1, wherein the photosensitive layer contains the silver halide and the polymerizable compound in microcapsules. 13. The photosensitive material according to claim 1, which is used for thermal development.