PLANOGRAPHIC PRINTING

摘要

A method of preparing a printing member or a printing member precursor involves contacting a substrate with an aqueous formulation comprising a polyester having pendent hydrophilic groups wherein said polyester has optionally been combined with a second compound. Said pendent hydrophilic groups may be selected from alkylene oxide moieties, carboxyl groups, amino groups, sulphonic groups, phosphoric groups, sulphuric acid ester salts, hydroxyl groups, salts of any other aforesaid and quaternary ammonium salts in general. Said printing member is preferably a lithographic printing member. It may be for use in wet or dry printing.