Patent ID: 8313888

Claim:
A photosensitive flexographic printing original plate, comprising (A) a supporting member, (B) a photosensitive resin layer, (C) a protective layer and (D) a heat sensitive mask layer that are successively laminated to form the photosensitive flexographic original printing plate, wherein the heat sensitive mask layer (D) contains an IR absorbent material consisting essentially of carbon black and a dispersion binder comprising a butyral resin and a polar group-containing polyamide selected from the group consisting of a polyamide containing a tertiary amine group, a polyamide containing a quaternary ammonium salt group, a polyamide containing an ether group and a polyamide containing a sulfonic group, and wherein the butyral resin and the polar group-containing polyamide have a weight ratio in a range from 20 to 80:20 to 80.