Method for preparing lithographic printing plate.

摘要

A lithographic printing plate is prepared from a silver halide photosensitive material in accordance with a DTR process. The photosensitive material is exposed and developed with a diffusion transfer processing solution containing a compound of the formula: RSO2SM wherein R is an aliphatic, aromatic or heterocyclic group and M is a hydrogen atom or cation as a silver halide complexing agent. The printing plate has good ink receptivity and minimized plate wear. The processing solution is free from the problems of corrosion and waste solution disposal.