| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a direct drawing waterless lithographic printing original plate capable of attaining both microdot reproducibility and printing adaptability. <P>SOLUTION: The direct drawing waterless lithographic printing original plate has at least a heat insulating layer, a heat sensitive layer and a silicone rubber layer in this order on a substrate. The heat sensitive layer contains at least (A) a photothermal conversion material, (B) a metal-containing organic compound, (C) a novolac resin and (D) a polyurethane resin, the novolac resin (C) containing two kinds of novolac resins differed in weight average molecular weight, one of the novolac resins having a maximal of molecular weight distribution by GPC at 500-5,000, and the other having a maximal at 10,000-50,000. <P>COPYRIGHT: (C)2009,JPO&INPIT |
