Patent ID: 6861200

Claim:
A negative working photosensitive lithographic printing plate which comprises an aluminum support subjected to a surface-roughening treatment having thereon a photosensitive layer which comprises a polymeric binder, a titanocene compound as a photo- or heat-polymerization initiator and a compound having an ethylenically unsaturated bond capable of addition polymerization, wherein the polymeric binder has repeating units represented by formula (I): wherein R 1 represents a hydrogen atom or a methyl group; R 2 represents a hydrocarbon group which has an alicyclic structure and has 3 to 30 carbon atoms and a valence of n+1; A represents an oxygen atom or —NR 3 —, wherein R 3 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms; and n is an integer of 1 to 5.