Process for making lithographic film using photopolymer diffusio

Details Process for making lithographic film using photopolymer diffusio Process for making lithographic film using photopolymer diffusio

1986-04-11

1987-03-31

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Forming nonplanar surface

430271, 430281, 430326, G03C 500

Patent

active

046542965

ABSTRACT:
Photopolymerizable element for preparation of lithographic film comprising (1) support (2) hydrophilic resin layer containing dispersed metal particles, e.g., silver, and (3) photopolymerizable layer comprising a hydrophilic macromolecular organic polymeric dispersion, e.g., gelatin medium, including a dispersed phase of ethylenically unsaturated monomer and photoinitiator or photoinitiator system. The element can form a negative lithographic film after imagewise exposure by bleaching, rinsing, optionally fixing and drying. A positive lithographic film is prepared after imagewise exposure by immersing in bath containing compound which generates sulfide ions and treating with bleach solution followed by rinsing and drying.

REFERENCES:
patent: 3718473 (1973-02-01), Gervay et al.
patent: 4029509 (1977-06-01), Blake
patent: 4047956 (1977-09-01), Blake

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