Process for preparing a lithographic printing plate

Details Process for preparing a lithographic printing plate Process for preparing a lithographic printing plate

1995-02-14

1995-12-19

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430325, 430326, 430331, G03F 732

Patent

active

054767547

ABSTRACT:
A presensitized plate comprises a substrate having a hydrophilic surface provided thereon with a light-sensitive layer containing an alkaline water-soluble or swellable photocrosslinkable polymer carrying photodimerizable unsaturated double bonds and an optional intermediate layer between the substrate and the light-sensitive layer wherein the light-sensitive layer and/or the intermediate layer contain a co-polycondensed diazo resin having, as the structural units, those derived from an aromatic compound having at least one carboxyl group and an aromatic diazonium compound, for instance 4-diazodiphenylamine salt. The light-sensitive layer and/or the intermediate layer of the plate exhibit high adhesion to the substrate or the like while maintaining high sensitivity and excellent quality thereof and the plate can be developed with an alkaline water to provide lithographic printing plates having excellent quality such as printing durability.

REFERENCES:
patent: 2063631 (1936-12-01), Schmidt et al.
patent: 2679498 (1954-05-01), Seven et al.
patent: 3867147 (1975-02-01), Teuscher
patent: 4079041 (1978-03-01), Baumann et al.
patent: 4107174 (1978-08-01), Baumann et al.
patent: 4845009 (1989-07-01), Kita et al.
patent: 4956261 (1990-09-01), Pawlowski et al.
Patent Abstracts of Japan, vol. 13, No. 342, Aug. 2, 1989, p. 908.
Patent Abstracts of Japan, vol. 13, No. 1, Jan. 8, 1990, p. 985.

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