Patent ID: 7989141

Claim:
A lithographic printing plate precursor comprising: a support; and an image forming layer formed from a photosensitive composition, wherein the photosensitive composition comprises: a photopolymerization initiator; a polymerizable compound; a sensitizing dye which absorbs light of from 350 nm to 450 nm; and a binder polymer comprising a graft chain having a molecular weight of from 500 to 50000, and the graft chain is a hydrophilic graft chain comprising a hydrophilic group, wherein the hydrophilic group is a hydroxyl group; an amino group; an amide group; a salt obtained by neutralizing a carboxylic acid, sulfonic acid or phosphoric acid; or an ammonium salt; and a main chain of the binder polymer comprising a graft chain comprises a crosslinking group.