| 摘要 |
PURPOSE:To obtain a photosensitive lithographic plate enhanced in sensitivity without losing any balance among various performances by forming a photosensitive layer containing an o-quinonediazide compound, an alkali-soluble resin, and a lactone compound on a support. CONSTITUTION:The photosensitive layer formed on the support contains the o-quinonediazide compound, the alkali-soluble resin, and the lactone compound. The o-quinonediazide to be used is, preferably, such as the ester of a hydroxyl compound with benzoquinone-1,2-diazidosulfonic acid or naphthoquinone-1,2- diazidosulfonic acid, and it is used, preferably, in an amount of 5-80wt% of the total solids. As the hydroxyl compound, phenol formaldehyde resin, cresol formaldehyde resin, or the like are preferable, and these resins are preferable, too, as the alkali-soluble resin. The alkali-soluble resin is contained, preferably, in an amount of 30-90wt% of the total solids, and it is preferred to add the lactone resin, preferably, in an amount of 0.05-20wt% of the total solids. |
