| abstract |
The present invention provides an on-press development type lithographic printing plate precursor, and a method for making or lithographic printing plate using the above-mentioned on-press development type lithographic printing plate precursor, the on-press development type lithographic printing plate precursor having a support and the above-mentioned lithographic printing plate precursor. The image-recording layer formed on the support, the image-recording layer comprising an infrared absorber, a polymerization initiator, a polymerizable compound and a color former precursor ; When the recording layer is exposed to light, the rate of disappearance of ethylenically unsaturated bonds in the exposed region with respect to the unexposed region in the image recording layer is 10% to 40%. |