METHOD OF MAKING A LITHOGRAPHIC PRINTING PLATE

摘要

A method of making a lithographic printing plate comprising the steps of : a) providing a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on said support, comprising an imaging layer, and, optionally, an intermediate layer between the imaging layer and the support, wherein said imaging layer comprises a switchable polymer, b) image-wise exposing said coating, whereby said polymer undergoes a chemical reaction induced by said exposing, thereby creating a lithographic image consisting of printing areas and non-printing areas wherein the non-printing areas are removable from the support by a gum solution, c) developing the precursor by treating the coating of the precursor with said gum solution, thereby removing the non-printing areas.