PHOTOSENSITIVE PLANOGRAPHIC PRINTING PLATE PRECURSOR AND METHOD FOR PRODUCING PLANOGRAPHIC PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a planographic printing plate precursor, which suppresses ablation during infrared laser exposure and can give a planographic printing plate achieving both of good developability of a non-image portion and printing durability of an image portion.

SOLUTION: The photosensitive planographic printing plate precursor includes an image recording layer on a hydrophilic support. The image recording layer comprises: (A) an infrared absorbent; and (B) a copolymer having a repeating unit having a zwitterionic structure in a side chain thereof, and a repeating unit having a heteroalicyclic structure in the main chain thereof or a repeating unit having a hetero atom and an alicyclic structure in the main chain.

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