| 摘要 |
PROBLEM TO BE SOLVED: To provide a photosensitive planographic printing plate developable with an aqueous alkali developing solution, having superior wear resistance, high wear resistance and superior chemical resistance, high plate durability even when printing with UV ink (ultraviolet-curing ink) is carried out without carryin out a burning processing and excellent in aging stability. SOLUTION: In the photosensitive planographic printing plate with a photosensitive layer containing a vinyl polymerized high molecular compound (A) insoluble in water and soluble in an alkaline aqueous solution and o-naphthoquinone diazide (B) on the substrate, the high molecular compound (A) is a copolymer containing at least one monomer of formula (I) (where X1, R1, R2, Y1, Z1, n and m are defined in this specification) and an acrylonitrile monomer as monomer units, and the amount of free acrylonitrile is <=1 part by mass based on 100 parts by mass of the total solid content of the high molecular compound (A). |
