PROCESSING METHOD OF SILVER SALT PLANOGRAPHIC PRINTING BLOCK

摘要

PURPOSE:To provide a processing method of planographic printing block which gives an excellent non-picture line section to repellent property of ink and applies a photographic method which does not affect ink receive property of the picture line section adversely. CONSTITUTION:In a planographic printing block which utilizes picture image silver as ink receive property, a silver salt planographic printing block is processed by a processing device which has a development tank, a neutralization tank, and a third tank which contains at least one compound which is selected from among colloidal minute particles and hygroscopic polyor compound.