Mitsubishi Paper Mills Limited

Sukeaki Date

Toshiro Kondo

Seigo Ebato

Hidetoshi Miura

Seiichi Sumi

Masao Okushima

Eiichi Terashima

Eiji Matsubara

Kyonosuki Yamamoto

Disclosed is a developer for silver halide photographic light-sensitive material which contains at least one of the compounds represented by the following formulas [I], [II] and [III]: Formula [I]: ##STR1## wherein M represents a hydrogen atom, an alkali metal or NH.sub.4 and A and B each represents a mercapto group, a hydroxyl group, a hydroxyalkyl group, or ##STR2## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom or --X--Y group in which X represents a divalent group and Y represents a carboxyl group or a hydroxyl group, Formula [II]: ##STR3## wherein M represents a hydrogen atom, an alkali metal or NH.sub.4, A' represents an organic divalent group, and B' represents --SO.sub.3 M', --COOM', --SO.sub.2 NHR.sub.3, --CONHR.sub.3, or --OH wherein M' represents a hydrogen atom, an alkali metal atom or NH.sub.4, and R.sub.3 represents a hydrogen atom or an alkyl group of 1-3 carbon atoms, and Formula [III]: ##STR4## wherein M and B' are the same as defined in the above formula [II]:

Developer for silver halide photographic light-sensitive material

The present invention provides a processing composition which is used for lithographic printing plate where silver image is used as ink receptive area for enhancing ink receptivity of the silver image. This composition contains an organic compound having two or more mercapto groups or thion groups and, in combination therewith, an aromatic sulfonic acid formalin condensate, an anionic surfactant having a polyoxyethylene group, an aromatic carboxylic acid, a hydrosulfite compound, a water-soluble polymer having a carboxyl group and having a number-average molecular weight of about 20,000 or less, a hydroxyaryl fatty acid, or an organic disulfide compound. If this composition additionally contains an oxidizing agent, it can further improve printing endurance of the printing plate.

Processing composition for printing plate

Silver halide photographic materials having excellent antistatic property and high acceptability for drafting, processing resistance and adhesion to hydrophobic supports can be obtained by providing antistatic layer which comprises (a) a styrene-maleic anhydride copolymer, (b) colloidal silica and (c) at least one compound selected from the group consisting of compounds having at least 2 ethyleneimino groups and compounds having at least 2 epoxy rings and which has a pH value of at least about 5, said antistatic layer being provided on one or both surfaces of the support.

Antistatic layer for silver halide photographic materials

A photographic material comprising a support having on the surface a polypropylene resin component and a hydrophilic colloidal layer on the top surface which are firmly adhered together, is produced by subjecting the support having on the surface a polypropylene resin component to corona discharge, applying thereto a subbing layer comprising (a) at least one water-dispersed polymer latex selected from butadiene-acrylic ester copolymers, polyvinyl chloride and polystyrene, (b) a compound having an ethyleneimino group such as that capable of hardening a colloidal gelatin or casein, and (c) a water-soluble polymer, and providing a hydrophilic protective colloidal layer on said subbing layer.

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Nagaokakyo, Japan

Sukeaki Date