Photopolymer imaging using epoxy and bromine containing ethylenically unsaturated compounds

A method for forming radiation images comprising the steps of (a) preparing a substrate, (b) forming on said substrate a radiation-sensitive film composed of at least one polymeric compound selected from the group consisting of brominated and epoxidized polymers of butadiene, brominated and epoxidized copolymers of butadiene, brominated and epoxidized polymers of isoprene, brominated and epoxidized copolymers of isoprene, brominated products of copolymers of butadiene with addition-polymerizable compounds containing an epoxy group, brominated products of copolymers of isoprene with addition-polymerizable compounds containing an epoxy group and epoxidized products of copolymers of one of butadiene and isoprene with addition-polymerizable compounds containing at least one bromine atom, wherein the degree of epoxidation of the polymeric compound is about 17 to about 70% and the degree of bromination of the polymeric compound is about 7 to about 50%, the value of the sum of the epoxidation degree and bromination degree being lower than 100%, (c) exposing at least a part of said film to radiations to thereby render said part of the film solvent-insoluble, and (d) removing solvent-soluble parts of said film by development.