Patent ID: 6387595
Filing Date: 2002-05-14
Classification: B41C,B41M,B41N,G03F

Abstract:
A method of lithographically printing images on receiving media, comprising in order:(a) providing a lithographic printing plate comprising (i) a hydrophilic substrate; (ii) an oleophilic photosensitive layer capable of hardening or solubilization upon exposure to an actinic radiation, the non-hardened or solubilized areas of said photosensitive layer being soluble or dispersible ill ink and/or fountain solution; and (iii) an overcoat with a coverage of from 0.001 to 0.150 g/m2 which is soluble or dispersible in ink and/or fountain solution; (b) exposing said plate with an actinic radiation to cause hardening or solubilization of the exposed areas; and (c) contacting said exposed plate with ink and/or fountain solution on a lithographic press to remove the overcoat and the non-hardened or solubilized areas of said photosensitive layer, and to lithographically print images from said plate to the receiving media.