The Toppan Printing Co, Ltd. basic plate for laser sculpture and the Toppan Printing Co, Ltd. edition which then is obtained

摘要

Provided are a relief printing original plate for laser engraving capable of producing a printing plate which can prevent a printing failure at the time of high speed printing and is superior in resolution, a cured relief printing original plate for laser engraving and a photosensitive resin relief printing plate. The relief printing original plate for laser engraving is used for forming a printing plate by curing, with ultraviolet irradiation, a photosensitive resin composition layer obtained from a photosensitive resin composition comprising at least a soluble synthetic polymer, a photopolymerized unsaturated compound, and a photopolymerization initiator as main components, and thereafter, by forming an image by irradiating a laser beam, and is characterized by the fact that the photosensitive resin composition layer is formed by the photosensitive resin composition comprising polyether urea-urethane as a soluble synthetic polymer, an ethylene-based unsaturated monomer as a photopolymerized unsaturated compound, and a photopolymerization initiator, as essential components and a content of a (meta) acryloyl group in the photosensitive resin composition is 2.2-3.7 mol inclusive in 1000 grams of mass of the photosensitive resin composition.