| abstract |
(57) [Summary] [Object] It is possible to provide a negative photosensitive lithographic printing plate having improved gradation, that is, high contrast when a diazo resin is used as a photosensitive component. [Structure] (a) diazo resin, (b) alkali-soluble or swelling polymer compound, and (c) general formula (1) below Or at least one of the compounds represented by the general formula (2) Seeds are included. [Chemical 5] (In the formula, R 2 represents an alkoxy group having 1 to 3 carbon atoms, a phenyl group, a phenoxy group, a benzoyl group, an acetyl group, an acetoxy group, a hydroxy group, a carboxyl group or a carboxymethyl group, and m is 1 to 3 . represents an integer) in formula (2) HOCO-CH 2 -Z -CH 2 -COOH ( wherein, Z is - (CH 2) h -, - (CHCOOH) i -, - (CHOH) j -, - CR 3 = CR 4 - or a divalent saturated cyclic hydrocarbon residue. ) |