Presensitized plate for preparing lithographic printing plate

A presensitized plate for preparing a lithographic printing plate, which comprises a substrate provided thereon with a light-sensitive layer containing a fluoro-aliphatic group-containing copolymer prepared by copolymerizing at least the following monomers (A) and (B):

• (A) an addition polymerizable monomer having, on a side chain, a fluoro-aliphatic group in which hydrogen atoms are replaced with fluorine atoms;
• and
• (B) a (meth)acrylate having an ester chain represented by the following general formula (I) or (II):
• CH2═C(R1)—CO—O—R2—O—(CO—R3—O)n—R4 (I) CH2═C(R1)—CO—(O—R3—CO)n—O—R4 (II)
• (In the formulas, R1 represents —H or —CH3;
• R2 and R3 each independently represents an alkylene group having 1 to 12 carbon atoms;
• R4 represents a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, cycloalkyl group, aryl group, aralkyl group or heterocyclic group wherein the substituent on the group of R4 is selected from the group consisting of alkyl or alkoxy group having 1 to 6 carbon atoms and n is a number ranging from 1 to 50).