| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent work-up from adhering onto a form damping roller in the on press developing of a lithographic printing form original plate, onto which an image recording is possible through the scanning exposure with infrared laser beam. <P>SOLUTION: The lithographic printing form original plate, which is formed by providing an image recording layer including an infrared absorber (A), a polymerization initiator (B), a polymerizable compound (C) and a binder polymer (D) having an acidic group on a support, is installed on a printing machine and then image-wise exposed with infrared laser beam or is image-wise exposed with infrared laser beam and then installed on the printing machine and, by supplying alkaline dampening water and oily ink to the lithographic printing form original plate, the non-exposed portion by infrared laser beam in the lithographic printing form original plate is removed in order to execute the on press developing method. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
