On-press development type lithographic printing plate precursor and method of preparing printing plate

Abstract

In the present invention, there are provided an on-press development type lithographic printing plate precursor including an image-recording layer on a support, in which the image-recording layer contains a color-forming compound having a group that cleaves by infrared exposure, a polymerization initiator, a polymerizable compound, and a hydrogen-donating compound, and the hydrogen-donating compound is a compound different from the polymerization initiator, the polymerizable compound, the color-forming compound, and an acid-cleavable compound and is a compound having at least one group selected from the group consisting of —OH, —NH—, —SO2—NH—, —SO2—OH, —CO—NH—, and —CO—OH in a molecule and having a molecular weight of less than 3,000, and a method of preparing a printing plate.

Dependencies are inferred from the claim text.