Lithographic printing plate precursor

A lithographic printing plate precursor comprising, in the following order:

• a support;
• an intermediate layer;
• and an image-forming layer, wherein the intermediate layer comprises a polymer (A) comprising a repeating unit (a1) represented by the following formula (I):
• wherein R1 and R2 each independently represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, an aryl group or an aralkyl group;
• R3 and R4 each independently represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, an aryl group or an aralkyl group;
• R5 represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, an aryl group, an aralkyl group or -L2-Z;
• X1 represents —O—, —CO—, —CO—O—, —O—CO—, —NR500—, —NR500—CO— or —CO—NR500—;
• X2 represents —O—, —S— or —NR500—;
• L1 represents a single bond, —CO—, —O—, —NR500—, —S—, a divalent aliphatic group, a divalent aromatic group or a divalent connecting group selected from groups formed by combination of these groups;
• Y represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, an aryl group, —OH, an alkoxy group, —N(R500)(R501), a cyano group, a group selected from the following group Q, an amido group, a poly(ethyleneoxy) group or a carboxylic acid group not belonging to the group Q or a salt of the carboxylic acid group not belonging to the group Q;
• Q is a phosphonic acid group or a salt thereof, a phosphoric acid ester group or a salt thereof, a sulfonic acid group or a salt thereof, a sulfuric acid ester group or a salt thereof, an ammonium group or a salt thereof, a pyridinium group or a salt thereof, a 1,2-dicarboxylic acid group or a salt thereof, a phthalic acid group or a salt thereof, a 1,3-dicarboxylic acid group or a salt thereof, a 1,2-diol group, a catechol group or a salt thereof, a salicylic acid group or a salt thereof, a boronic acid group or a salt thereof, a trialkoxysilyloxy group or a 1,3-dicarbonyl group;
• L2 represents —CO—, —O—, —NR500—, —S—, a divalent aliphatic group, a divalent aromatic group or a divalent connecting group selected from groups formed by combination of these groups;
• Z represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, an aryl group, —OH, an alkoxy group, —N(R500)(R501), a cyano group, a group selected from the group Q, an amido group, a poly(ethyleneoxy) group or a carboxylic acid group not belonging to the group Q or a salt of the carboxylic acid group not belonging to the group Q;
• and
• R500 and R501 each independently represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group,
• wherein:
• (1) R5 in the formula (I) is -L2-Z, and Z is a group selected from the group Q, an amido group, a poly(ethyleneoxy) group or a carboxylic acid group not belonging to the group Q or a salt of the carboxylic acid group not belonging to the group Q,
• and/or
• (2) Y in the formula (I) is a group selected from the group Q, an amido group, a poly(ethyleneoxy) group or a carboxylic acid group not belonging to the group Q or a salt of the carboxylic acid group not belonging to the group Q.