Method for preparing dry lithographic plates.

摘要

A method for preparing a dry PS plate which comprises an aluminum plate as a substrate, wherein the method comprises the steps of degreasing at least one side of she aluminum substrate to which a light-sensitive layer is applied with an aqueous solution of an acid and then applying a light-sensitive layer and an ink-repellent layer to the degreased substrate. The dry PS plate comprising an aluminum plate as a substrate prepared by the method permits the substantial improvement of coating properties of films applied onto the aluminum plate, developability and half-tone dot reproduction as well as storage stability of these properties.