Photopolymerizable positive working, peel developable, single sheet color proofing system

A method for forming a colored image which comprises, in order:

• (A) providing a photosensitive element which comprises, in order:
• (i) a transparent support;
• and
• (ii) a single photosensitive composition layer on one surface of said support, which photosensitive layer comprises an organic binding resin, a colorant, a photoinitiator, and a free radical polymerizable acrylate or methacrylate component having at least two ethylenically unsaturated groups, wherein said binding resin is present in sufficient amount to bind the composition components into a uniform film, and wherein said colorant is present in sufficient amount to uniformly color the composition, and wherein said photoinitiator is present in sufficient amount to initiate the free radical polymerization of said polymerizable component upon exposure to sufficient actinic radiation, and wherein said polymerizable component is present in sufficient amount to provide image differentiation when the composition is image-wise exposed to actinic radiation;
• and
• (iii) an adhesive layer directly adhered to said colored, photosensitive layer, which adhesive layer comprises a thermoplastic resin which has a T.sub.g in the range of from about 25.degree. C. to about 100.degree. C.;
• and
• (B) either
• (i) providing a receiver base to which said adhesive layer is laminated at elevated temperature and pressure;
• and then image-wise exposing said photosensitive composition through the transparent support to actinic radiation;
• or
• (ii) image-wise exposing said photosensitive composition to actinic radiation;
• and then providing a receiver base to which said adhesive layer is laminated at elevated temperature and pressure;
• and
• (C) peeling apart said support and said receiver base, thereby transferring the adhesive layer and the image-wise nonexposed portions of the colored, photosensitive composition to the receiver base while the image-wise exposed portions remain on the surface of the support;
• and
• (D) optionally repeating steps (A) through (C) at least once with another photosensitive element having at least one different colorant transferred to the adhesive layer and image-wise nonexposed portions of the previously processed photosensitive element on said receiver base.