Printing plates are formed from a layer of photopolymerizable resin by a process and assembly which involves moving a resin layer past a variable intensity light source so as to sequentially and selectively cross-link the resin layer as the resin layer moves past the light source....http://www.google.de/patents/US5877848?utm_source=gb-gplus-sharePatent US5877848 - Continuous production of cross-linked resin relief images for printing plates
