A light-sensitive composition is described, containing: (A) a light-sensitive diazo compound, (B) a combination of Polymer (B-1) and Polymer (B-2), and (C) an epoxy resin. Polymer (B-1) is a polymer having the structural units of the general formulae (i), (ii) and (iii). Polymer (B-2) is a polymer having the structural units of the general formulae (iv), (v) and (vi). <IMAGE> (i) <IMAGE> (ii) <IMAGE> (iii) <IMAGE> (iv) <IMAGE> (v) <IMAGE> (vi) wherein R1 is a hydrogen atom or a methyl group, R2 is an unsubstituted or substituted benzyl group, a lower alkyl group, or a halogen-substituted lower alkyl group, R3 is a hydrogen atom, a lower alkyl group, or a halogen-substituted lower alkyl group, R4 is a tert- or iso-butyl group, and R5 is a lower alkyl group. This composition is a negative-type light-sensitive composition and is used to prepare a lithographic printing plate, for example. This printing plate is superior in lipophilic nature and also in mechanical properties such as abrasion resistance.
Light-sensitive negative working composition with diazonium condensate, epoxy resin, and combination of polymers with acrylic groups