Patent ID: 7507525

Claim:
A lithographic printing plate precursor comprising: an aluminum support subjected to a surface roughening treatment; and a photosensitive layer formed from a polymerizable composition comprising: (A) at least one saccharide selected from the group consisting of an oligosaccharide and a polysaccharide, the polysaccharide containing an amino group, an alkylamino group, an acetylamino group, an ethyleneoxy group, a sulfonic acid group, a phosphoric acid group, a urethane group, a urea group, or a thiol group as a hydrophilic group; (B) a film-forming binder polymer which is not the at least one saccharide (A); (C) a compound having an addition polymerizable ethylenic unsaturated bond; (D) a polymerization initiator; and (E) a sensitizing dyestuff having an absorption maximum at a wavelength of from 300 to 600 mn.