HYDROPHILIZED SUPPORT FOR PLANOGRAPHIC PRINTING PLATES AND ITS PREPARATION

摘要

A method of preparing a substrate for a planographic printing plate comprises contacting a support, for example of aluminium or plastics, with a liquid having a pH of 9 or greater and comprising a silicate solution, for example sodium silicate solution, in which particulate material, for example of alumina or titania, are dispersed. The liquid when cured produces a hydrophilic layer on the support. A substrate per se and a printing plate are also described.