Patent ID: 7618762

Claim:
A planographic printing plate precursor comprising a support and a laser-sensitive recording layer, and a layer other than the recording layer, which includes a copolymer comprising a first repeating unit having an ethylenic unsaturated bond and a second repeating unit having a functional group capable of interacting with a surface of the support wherein the planographic printing plate can be used for printing after exposure without being developed with an alkaline developer, the recording layer includes a polymer having a polymerizable group on a side chain thereof, wherein the planographic printing plate precursor is developable by i) attaching the planographic printing plate precursor to a printing machine; ii) imagewise exposing the planographic printing plate precursor to laser light; and iii) supplying printing ink and moistening water to the planographic printing plate precursor so as to remove the recording layer in unexposed regions and so as to generate a printing plate and conduct printing, and wherein the polymer comprises a copolymer component which has a structure represented by the following formula (S) on a side chain thereof: wherein in formula (S), Z 1 represents a connecting group; R 1 , R 2 and R 3 each independently represent a hydrogen atom, a halogen atom, a carboxyl group, a sulfo group, a nitro group, a cyano group, an amide group, an amino group, an alkyl group, an aryl group, an alkoxy group, or an aryloxy group, each of which may have a substituent; R 4 represents a group or atom which can combine with the benzene ring and may have a substituent; n represents 0 or 1; m1 represents an integer of 0 to 4; and k1 represents an integer of 1 to 4 and a copolymer component which has a structure represented by the following formula (AO) on a side chain thereof: wherein in formula (AO), Z A represents a connecting group; R A1 represents an alkylene group; R A2 represents a hydrogen atom, an alkyl group, or an aryl group; and n represents an integer of 1 to 20.