| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the developability after time elapse while maintaining superior printing resistance of an obtained planographic printing plate, in a planographic printing plate original plate that can perform image exposure by means of an infrared laser. <P>SOLUTION: The planographic printing plate original plate has an image recording layer containing a polymerizable composition which includes, on a hydrophilic support: a radically polymerizable compound (A); an infrared absorbing dye (B); a radical polymerization initiator (C); and a microgel (D); wherein the microgel (D) is obtained by reacting a compound (1) which includes at least one group having active hydrogen atom and further includes one or two ionic hydrophilic groups, a compound (2) which includes at least one group having active hydrogen atom and having no ionic hydrophilic group, and a multifunctional isocyanate compound (3). <P>COPYRIGHT: (C)2013,JPO&INPIT |
