ORIGINAL PLATE FOR PLANOGRAPHIC PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To provide an original plate for planographic printing plate suitable for exposure by laser beam and having both high adhesion and excellent fouling property. SOLUTION: The original plate for planographic printing plate is formed by providing an intermediate layer containing a polymer having a cationic group and a radical reactive group and a photopolymerizable photosensitive layer containing a photopolymerization initiator, a compound having an addition polymerizable ethylenic unsaturated bond and a high polymer binder on an aluminum supporting body treated for hydrophilicity impartation.