Abstract: This invention relates to an improvement in a negative-working light-sensitive copying composition comprising at least one condensation product of a diazonium salt, at least one water-soluble synthetic polymer and at least one acrylic resin which is soluble or at least swellable in an aqueous alkaline solution, the immprovement that the water-soluble synthetic polymer is a copolymer of a C.sub.3 to C.sub.16 alkyl acrylate and an N-vinyl-N-alkyl carboxylic acid amide, the alkyl and carboxylic acid groups of which contain 1 to 6 carbon atoms each. The invention also relates to a process for the preparation of a planographic printing foil using the novel light-sensitive composition.

Abstract: The invention relates to a photopolymerizable copying composition comprising at least one polymerizable compound, at least one photo-initiator, and at least one copolymer of (A) an unsaturated carboxylic acid, (B) an alkyl methacrylate with at least 4 carbon atoms in the alkyl group, and (C) at least one additional monomer which is capable of copolymerization with monomers (A) and (B), the homopolymer of said additional monomer having a glass transition temperature of at least 80.degree.C.