Patent ID: 8142982

Claim:
A lithographic printing plate precursor capable of being subjected to on-press development by supplying at least one of printing ink and dampening water and comprising a support, an image-recording layer and optionally an undercoat layer between the support and the image-recording layer, wherein at least one of the undercoat layer and the image-recording layer comprises at least one of a compound represented by the following formula (IA), R-Z-Y—X (1A) wherein, R represents a substituted or unsubstituted alkyl group, Z represents a polyoxyethylene group or a polyoxypropylene group, Y represents a substituted or unsubstituted alkylene group having 18 or less carbon atoms, a substituted or unsubstituted arylene group having 30 or less carbon atoms or a divalent heterocyclic group, and X represents a sulfonate.