ORIGINAL PLATE FOR DIRECT-PATTERN WATERLESS PLANOGRAPHIC PRINTING PLATE

摘要

An original plate for a direct-pattern waterless planographic printing plate having at least a heat-sensitive layer and a silicone rubber layer in the stated order on a substrate; wherein the heat-sensitive layer in the original plate for a direct-pattern waterless planographic printing plate contains at least a novolac resin, polyurethane, and a photothermal-converting substance, and has a phase separation structure having at least a phase that contains the novolac resin and a phase that contains the polyurethane. The present invention provides an original plate for a direct-pattern waterless planographic printing plate not susceptible to blistering at high sensitivity, i.e., having wide latitude.