| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide: a method for producing a lithographic printing plate, wherein, in the non-alkaline development of a lithographic printing original plate having a protective layer, even if the protective layer components are mingled into the developer, the reduction in development removability of the image recording layer and the generation of development scum can be inhibited; an on-press development type lithographic printing original plate with excellent ink receptivity, high scratch resistance, satisfied on-press developability and good fine line reproducibility; and a lithographic printing method. <P>SOLUTION: The method for producing a lithographic printing plate comprises: imagewise-exposing a lithographic printing original plate comprising a support, an image recording layer and a protective layer; and rubbing the plate surface by a rubbing member of an automatic processor in the presence of a developer at a pH of 2-10 to remove the protective layer and the image recording layer in the unexposed area. The lithographic printing original plate has on a support an image recording layer removable with a printing ink and/or dampening water and a protective layer containing a polyvinyl alcohol having a carboxyl group and/or a sulfonic acid group within the molecule. The lithographic printing method comprises on-press development. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
