PHOTOSENSITIVE COMPOSITION AND PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a photosensitive composition for a lithographic printing plate which is high in sensitivity and superior in resistances to chemicals and printing. SOLUTION: This photosensitive composition comprises a monomer, having an ethylenically unsaturated bond and an acidic vinyl copolymer soluble or swellable in an aqueous solution of alkali and having unsaturated groups on its side chains and a photopolymerization initiator containing a titanocene compound and a halomethyloxadiazole compound.