Patent ID: 7670753

Claim:
A lithographic printing plate precursor comprising a support and a photosensitive layer, said lithographic printing plate precursor further comprising a subbing layer between said photosensitive layer and said support, said subbing layer containing a maleamic acid (co)polymer, in which at least one hydrogen atom on a nitrogen atom is substituted with an onium group, wherein said maleamic acid (co)polymer contains a recurring unit of the following formula Chemical Formula 1: wherein Y 1 represents an onium group having the following Chemical Formula 2: wherein: R 1 and R 2 each independently represents a C 1 -C 4 alkyl group; R 3 represents a hydrogen atom or a C 1 -C 4 alkyl group; X − represents a counter anion; and Z represents a divalent organic group), and Y 2 represents a hydrogen atom or an onium group as defined above.