JPH04304449A - Silver complex salt diffusion transfer image receiving material - Google Patents

Abstract

PURPOSE:To provide the silver complex salt diffusion transfer transparent image receiving material having a high transmission density. CONSTITUTION:This image receiving material is constituted by applying wet on wet an image receiving layer-forming liquid contg. at least physical development nuclei on a base and an under coat layer-forming liquid contg. substantially no physical development nuclei there under. The solid content of the hydrophilic colloidal layer of the under coat layer is specified to a 0.5 to 5g range per m<2>.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver complex diffusion transfer material that combines a photosensitive material and an image-receiving material, and more particularly to a silver complex diffusion transfer image-receiving material having a high transmission density.

0002

[Prior Art] The silver complex diffusion transfer method generally uses a light-sensitive material in which a silver halide emulsion layer is formed on a support as a light-sensitive layer, an image-receiving material in which an image-receiving layer containing physical development nuclei is formed on a support, and It consists of a processing solution containing a silver halide solvent. The principle of the silver complex diffusion transfer method is that the silver halide in the exposed areas of the exposed photosensitive layer is developed by a processing solution or a developing agent in the photosensitive material, and at the same time, the silver halide in the unexposed areas is developed by the halogen in the processing solution. It reacts with a silver oxide solvent to form a soluble silver complex salt, which diffuses into the image-receiving material and deposits on physical development nuclei in the image-receiving layer to form a silver image.

[0003] The silver complex diffusion transfer method based on such a principle is widely used for copying documents and as a plate material for plate-making operations. The important qualities of the image-receiving material used in the silver complex diffusion transfer method are high silver image density (reflection and transmission density), good color tone (reflection and transmission) (generally a blue-black tone is desired), and a fast diffusion transfer speed. Furthermore, it is important that the image-receiving layer has sufficient film strength. In particular, silver image density (reflection and transmission density) is an extremely important quality, and when used as a printing material, image quality (fine lines and net quality)
It is said that high image density is desirable for good reproduction.

However, conventional diffusion transfer transmission image-receiving materials do not have very high transmission density.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a transmission image-receiving material having a high transmission density.

[0006]

[Means for Solving the Problems] The present inventors conducted extensive research on the solid content of the multilayer structure, especially the undercoat layer, and found that a high transmission density can be achieved when the solid content of the undercoat layer is set to 0.5 g/m2 or more. I found out what I can get. Conventionally, in silver salt photosensitive materials and silver complex salt diffusion transfer materials, an undercoat layer has been provided to improve adhesion to the support, but it has not been possible to provide a relatively thick undercoat layer for the purpose of increasing transfer density. unknown. The amount of binder in the undercoat layer is 0.5 g/m2 or more, preferably 1.0 g/m2 to 3.0 g/m2. Further, the undercoat layer can contain a physical development accelerator and other functional substances. Further, an over layer may be provided on the image receiving layer.

Binders for the undercoat layer and image-receiving layer include gelatin, phthalated gelatin, acylated gelatin, phenylcarbamylated gelatin, carboxymethyl cellulose, hydroxyethyl cellulose, sodium alginate, polyvinyl alcohol, partially saponified polyvinyl alcohol, Heat-processed products of polyvinyl alcohol and maleic anhydride copolymers (e.g., styrene-maleic anhydride, ethylene maleic anhydride, etc.), polyacrylamide, poly-N-vinylpyrrolidone, latexes (e.g., polyacrylic ester, Water-soluble polymer compounds such as polymethacrylic acid ester, polystyrene, polybutadiene, etc. alone or in combination can be used alone or in combination.

The image-receiving layer can be hardened with a suitable hardening agent. Specific examples of the hardening agent include aldehyde compounds such as formaldehyde and glutaraldehyde, ketone compounds such as diacetyl and cyclopentanedione, Bis(2-chloroethylurea)-2-hydroxy-4,6-
Dichloro-1,3,5 triazine, U.S. Pat. No. 3,28
8,775, divinyl sulfone, U.S. Pat. No. 3,635,718.
compounds with reactive olefins as described in US Pat. No. 2,732,316, isocyanates as described in US Pat. No. 3,103,437, US Pat. No. 3,017 , No. 280, No. 2,
aziridine compounds as described in US Pat. No. 983,611, carbodiimide compounds as described in US Pat. No. 3,100,704, epoxy compounds as described in US Pat. No. 3,091,537, and halogenocarboxaldehydes such as mucochloric acid. , dioxane derivatives such as dihydroxydioxane, inorganic hardeners such as chromium alum, potassium alum, and zirconium sulfate, and these may be used alone or in combination of two or more.

Physical development nuclei used in the image-receiving layer of the image-receiving material according to the present invention include noble metals such as silver, gold, platinum, palladium, copper, cadmium, lead, cobalt, and nickel, or their sulfides and selenides. Can be used. These are preferably colloidal.

The image-receiving layer contains a surfactant (for example, a natural surfactant such as saponin, a nonionic surfactant such as an alkylene oxide type, a glycerin type, a glycidol type, etc., a higher alkyl amine, a quaternary ammonium salt, pyridine, etc.). Heterocycles, cationic surfactants such as sulfoniums, anionic surfactants containing acidic groups such as carboxylic acids, sulfonic acids, phosphoric acids, sulfate ester groups, phosphoric ester groups, amino acids, aminosulfonic acids, amino alcohols, etc. amphoteric surfactants such as sulfuric acid or phosphoric acid esters, fluorine-based anions, amphoteric surfactants, etc.), matting agents, fluorescent dyes, discoloration inhibitors, color toning agents (typical examples include 1-phenyl-5-mercaptotetrazole) , other color toning agents described in Photographic Silver Halide Diffusion Process, page 61, published by Focal Press), developing agents (e.g., hydroquinone and its derivatives, 1-phenyl-3-pyrazolidone and its derivatives, etc.), halogenated Silver solvents (eg, sodium thiosulfate, ammonium thiosulfate, sodium thiocyanate, potassium thiocyanate, etc.) may be included. Further, an over layer may be provided on the image receiving layer, a neutralizing layer below the image receiving layer, and a subbing layer for improving adhesion to the support.

As mentioned above, the silver halide emulsion used in the photosensitive layer of the photosensitive material for silver complex diffusion transfer according to the present invention is preferably an emulsion containing mainly silver chloride, but the emulsion is not limited thereto. Rather, any emulsion commonly used for diffusion transfer may be used, as long as its silver complexes have the ability to develop and diffuse, respectively, in the exposed and unexposed areas at the speeds required for the diffusion transfer process, and are odor-free. Mention may be made of silver chloride, silver iodide, silver chloride, silver chlorobromide, silver iodobromide, silver chloroiodide, silver chloroiodobromide and mixtures thereof.

Silver halide emulsions can be sensitized in a variety of ways when they are manufactured or coated. It may be chemically sensitized by methods well known in the art, such as with sodium thiosulfate, alkylthioureas, or with gold compounds such as rhodan gold, gold chloride, or a combination of both. In addition, commonly used spectral sensitization can be performed.

As the binder for the photosensitive layer, a polymeric substance commonly used in the production of silver halide emulsions, such as the binder described for the image-receiving layer, can be used. Further, the photosensitive layer can be hardened using a suitable hardening agent as described for the image-receiving layer. Furthermore, the photosensitive layer contains additives generally used in silver halide photosensitive materials, such as surfactants, antifoggants, matting agents, fluorescent dyes, and developing agents (e.g., hydroquinone and its derivatives, 1-phenyl-3- pyrazolidone and its derivatives) can be used. Furthermore, in addition to the photosensitive layer, auxiliary layers such as an undercoat layer, intermediate layer, protective layer, and release layer may be provided as necessary.

The support for the light-sensitive material and image-receiving material for silver complex diffusion transfer according to the present invention is any commonly used transparent support. Glass, films such as cellulose acetate film, polyvinyl acetal film, polystyrene film, polyethylene phthalate film, etc. can be used therefor.

The processing solution for silver complex diffusion transfer in the present invention can have the composition of a conventional silver complex diffusion transfer processing solution. That is, developing agents for developing exposed silver halide, such as hydroquinone and its derivatives, 1-phenyl-3-pyrazolidone and its derivatives, solvents for undeveloped silver halide, such as sodium thiosulfate, ammonium thiosulfate, etc. , sodium thiocyanate, potassium thiocyanate, etc., sodium sulfite as a preservative, potassium bromide as a development inhibitor, additives such as 1-phenyl-5-mercaptotetrazole as a color toning agent, alkaline substances such as sodium hydroxide, Potassium hydroxide, lithium hydroxide, trisodium phosphate, thickening agents such as carboxymethyl cellulose, hydroxyethyl cellulose, etc. may be included.

[0016]

[Examples] The present invention will be explained below with reference to Examples, but the present invention is not limited in any way.

Example 1 Physical development nuclei consisting of nickel sulfide and silver sulfide were produced in a 1% aqueous gelatin solution by reacting equimolar amounts of nickel nitrate, silver nitrate, and sodium sulfide. Hydrophilic colloid dry weight per m2 of gelatin aqueous solution on polyethylene terephthalate film support was 0g (comparative example without undercoat layer), 0.5g, 1.
0g, 1.5g, 2.0g (Samples 1, 2, 3, 4, 5)
An undercoat layer was formed by applying the following coating to form an undercoat layer. Further, an image-receiving layer-forming liquid containing the above-mentioned physical development core solution was coated to give a hydrophilic colloid dry weight of 1.5 g/m 2 to form an image-receiving layer, thereby producing image-receiving materials of the present invention and comparative examples.

The light-sensitive material is a polyethylene laminated paper with an undercoat layer containing carbon black for antihalation, and an ortho-sensitized silver chlorobromide (silver bromide 5 A gelatin silver halide emulsion containing 1.5 g/m2 (mol%) in terms of silver nitrate, 0.2 g/m2 of 1-phenyl-3-pyrazolidone, 0.7 g/m2 of hydroquinone, and 4 g/m2 of gelatin. Manufactured in layers. The silver halide emulsion layer is hardened by containing a hardening agent so as not to interfere with diffusion transfer.

A diffusion transfer treatment solution having the following composition was used. water
800ml
Sodium hydroxide
25g anhydrous sodium sulfite
100g hydroquinone

20g 1-phenyl-3-pyrazolidone 1g potassium bromide
3g sodium thiosulfate
30g1-phenyl-5-
Add mercaptotetrazole 0.1g water
1000ml

The light-sensitive material produced as described above is exposed to appropriate light using a plate-making camera using an original with a moderate amount of black, and the emulsion surface of the light-sensitive material and the image-receiving surface of the image-receiving material are overlapped, and the above-mentioned diffusion transfer processing liquid is applied. Both materials were passed through a processor with a squeeze roller inserted and peeled off one minute after exiting the squeeze roller. The image-receiving material was washed with water for about 30 seconds, dried, and the transmission density of the black area was measured using Macbeth T.
Measured with a D504 transmission densitometer. The results are shown in Table 1.

[0021]

[Table 1]

[0022]

As is clear from the Examples, the image-receiving material according to the present invention exhibits high transmission density.

Claims (1)

[Claims] Claim 1: In an image-receiving material in which an image-receiving layer-forming liquid containing at least physical development nuclei and an undercoat layer-forming liquid substantially free of physical development nuclei are coated on a support in a multilayer manner, the undercoat layer is hydrophilic. An image-receiving material characterized in that the solid content of the sex colloid is in the range of 0.5 g/m2 to 5.0 g/m2.