Lithographic printing plate

Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...

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430204, 430227, 430264, G03C 300

Patent

active

054379571

ABSTRACT:
Disclosed is a lithographic printing plate material comprising a support and, provided thereon, at least a silver halide emulsion layer and a physical development nuclei layer wherein the physical development nuclei layer and/or a layer contiguous thereto contains at least one of water-soluble polymers represented by the following formula (I) or at least one of water-soluble polymers represented by the following formula (II): ##STR1## wherein R.sub.1 represents H or an alkyl group, R.sub.2 represents H or an alkali metal atom, n is 1-100 mol %, m is 0-50 mol % and l is 0-5 mol %, ##STR2## wherein R.sub.3 and R.sub.4 each represent a hydrogen atom or a lower alkyl group and A represents a residue of an ethylenically unsaturated monomer, l is 99.9-40 mol %, m is 0.1-10 mol % and n is 0-50 mol %. The polymer of the formula (I) may be used in combination with a water-soluble polysaccharide.

REFERENCES:
patent: 4115124 (1978-09-01), Hamilton et al.
patent: 4160670 (1979-07-01), Tsubai et al.
patent: 4734354 (1988-03-01), Takagi
patent: 4746594 (1988-05-01), Kasawa et al.
patent: 5108871 (1992-04-01), Yamano
patent: 5236802 (1993-08-01), Yamano et al.
Database WPI, Section Ch, Week 9249, Derwent Publications Ltd., London, GB; Class A14, AN 92-402334 & JP-A-4 298 752 (Mitsubishi Paper Mills, Ltd.) 22 Oct. 1992 *abstract*.

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