PHOTOSENSITIVE COMPOSITION, PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE AND METHOD FOR DEVELOPING THE PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a photosensitive composition suitable for forming a photosensitive layer of a photosensitive lithographic printing plate superior in sensitivity and storage stability and a photosensitive lithographic printing plate developable with an aqueous alkaline solution substantially not containing any solvent. SOLUTION: This photosensitive composition comprises a photopolymerization initiator and a polymerizable compound having an addition-polymerizabule unsaturated bond and a polymer capable of forming a film and the photopolymerization initiator contains a compound represented by the formula in which R<1> is H, an alkyl or the like; R<2> is H, an alkyl; (a) is 0, 1, or 2; X is a halogen; and each of (b) and (c) is an integer of 0-3 and b+c<=5.