| 摘要 |
PROBLEM TO BE SOLVED: To provide an original plate for a planographic printing plate having a photosensitive layer whose uniformity and solubility and dispersibility in a developing solution have been improved and having a high-contrast image forming property without lowering of sensitivity. SOLUTION: The original plate has a photosensitive layer containing a fluoroaliphatic group-containing copolymer obtained by copolymerizing at least (A) an addition polymerizable monomer having a fluoroaliphatic group containing fluorine atoms substituted for hydrogen atoms in a side chain and (B) a (meth)acrylate having an ester chain represented by formula (I) or (II) on a support. In the formulae, R<1> is -H or -CH3 ; R<2> and R<3> are each a 1-12C alkylene; R<4> is H, a 1-12C alkyl which may have a substituent, cycloalkyl, aryl, aralkyl or a heterocycle; and (n) is an integer of 1-50. |
