PURPOSE: To eliminate dependency on a variation of an aq. developing soln. and a pH change by forming a specified photosensitive negative processable recording layer developable with water or an aq. alkali soln. CONSTITUTION: This plate has a photosensitive recording layer contg. a (meth) acrylic acid-(meth)acrylate copolymer contg. 4-[(meth) acrylamidomethyl]pyrazole and/ or 4-[(meth)acrylamidomethyl]isooxazole represented by formula I as a polymer binder. In the formula, R is H or methyl, R<2> is H, methyl or ethyl, each of R<2> and R<3> is 1-6C alkyl or 6-20C aryl, X is O or NR<4> and R<4> is H. Printing characteristics almost independent of a variation of an aq. developing soln. and a pH change are ensured.
PHOTOSENSITIVE NEGATIVE TREATMENT OFFSET PRINTING PLATE