Light-sensitive composition and light-sensitive lithographic printing plate using the same

摘要

Disclosed is a light-sensitive composition containing an o-quinonediazide compound, a novolak resin and a polymer, characterized in that the polymer contains a constitutional unit selected from the group consisting of constitutional units represented by the formulae (I), (II) and (III): <CHEM> <CHEM> <CHEM> wherein R<1> to R<12> each represent a hydrogen atom, an alkyl group or a phenyl group, and a lithographic printing plate using the same.