| 摘要 |
PROBLEM TO BE SOLVED: To provide a treating method of a photosensitive lithographic printing plate by which the finishing treatment for a photosensitive lithographic printing plate having an aluminum plate as a supporting body can be stably continued while suppressing production of insoluble scum in the finishing bath after the printing plate is developed with a developer containing nonreducing sugars and bases (except for silicates), and to provide a treating method of a photosensi tive lithographic printing plate to produce a lithographic printing plate without printing contamination or failure in ink deposition for a long time. SOLUTION: In the treating method of a photosensitive lithographic printing plate, a photosensitive lithographic printing plate having an aluminum plate as a support is exposed, developed with a developer containing nonreductive sugars and bases (except silicates), and then subjected to finishing treatment. In this process, the finishing liquid contains at least one kind of hydroxycarboxylic acid. |
