FLEXOGRAPHIC PRINTING ORIGINAL PLATE AND WATER-DEVELOPABLE PHOTOSENSITIVE RESIN LAMINATE

摘要

A water-developable flexographic printing original plate, which uses a latex having a high degree of gelation in a photosensitive resin layer, and which has a good balance between resistance to solvent-borne inks and suppression of dot gain in a printing plate. Provided is a water-developable photosensitive resin laminate for letterpress printing original plates, which has excellent reproducibility of a fine pattern during the production of a printing plate and during the printing. A water-developable flexographic printing original plate of the present invention is characterized by being obtained by sequentially laminating at least a supporting body, a photosensitive resin layer that contains 25% by mass or more of a latex having a degree of gelation of 55% or more, and a bonding prevention layer, and is also characterized in that the bonding prevention layer contains a cellulose derivative. A water-developable photosensitive resin laminate of the present invention is characterized by being obtained by sequentially laminating at least a supporting body, an adhesive layer, a photosensitive resin layer that contains a water-soluble polymer compound, and a bonding prevention layer, and is also characterized in that the bonding prevention layer contains a cellulose derivative.