| abstract |
(57) [Summary] (Correction) [Structure] In a positive-working photosensitive lithographic printing plate having a photosensitive layer provided on a support, the photosensitive layer is a phenol derivative, A positive-type photosensitive resin containing a water-insoluble and alkali-water-soluble resin and a mixture of an o-quinonediazide or a compound capable of generating an acid upon exposure and a compound having at least one C—O—C group decomposable by the acid. A composition, wherein the phenol derivative is a compound represented by the general formula (I): A positive photosensitive lithographic printing plate characterized by being a mixture of compounds represented by the general formula (II). [X 1 ~ in Formula (I) X 6 represents CH 2 OH or H, and at least three of X 1 to X 6 are CH 2 OH. In formula (II), Y 1 to Y 6 are CH 2 OCH. 3 , CH 2 OH or H, at least three of Y 1 to Y 6 are CH 2 OCH 3 or CH 2 OH, and at least one of them is CH 2 OCH 3 . [Effect] Burning entanglement does not occur even if the burning treatment is performed at a high temperature, the development tolerance is wide, and the inking property is Excellent printing durability. |