LIGHT-SENSITIVE COPYING COMPOSITION CONTAINING THE CONDENSATION PRODUCT OF A DIAZONIUM SALT, A WATER SOLUBLE COPOLYMER AND AN ACRYLIC RESIN

摘要

K-2506 LIGHT-SENSITIVE COPYING COMPOSITION 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 improvement that the water-soluble synthetic polymer is a copolymer of a C3 to C16 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.