| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative type damping waterless photosensitive planographic printing plate having sufficient sensitivity in the wide range from an UV - a visible region to an IR region, capable of directly recording digital data such as a computer and excellent in tone reproducibility even when water is used a developer against the tone reproducibility and the lapse of time after image exposure. SOLUTION: A radiant ray sensitive layer and a silicone rubber layer are successively laminated on a substrate. The radiant ray sensitive layer contains at least a high molecular compd. having one structure selected from the group consisting of sulfonic esters, disulfone and sulfonimide in the molecule. The high molecular compd. preferably has a group that generates sulfonic acid by decomposition in a side chain and it is preferably used in combination with an acid precursor that generates an acid by the radiant ray or an IR absorber. |
