Patent ID: 6071669
Filing Date: 2000-06-06
Classification: G03F

Abstract:
A process for forming a prepress proof comprising, in order:(I) providing a photosensitive element comprising, in order,(a) a first strippable substrate;(b) a substantially transparent, non-photosensitive, polymeric isolation layer having a coating weight of 10 to 150 mg/dm.sup.2 ;(c) an essentially non-photosensitive, non-tacky organic layer having a coating weight of 25 to 200 mg/dm.sup.2, and comprising a polymer selected from:(i) structured polymers prepared from at least one aromatic monomer and at least one monomer selected from ethylene, propylene, butylene, isobutylene, butene, 1,4-hexadiene, and vinyl acetal; and(ii) reaction products of random polymers prepared from at least one aromatic monomer and at least one monomer selected from ethylene, propylene, and butylene, with a compound selected from 2-butenedioic acid and cyclic anhydrides;(d) a photosensitive layer; and(e) a second strippable substrate adjacent to the photosensitive layer;(II) removing the first substrate and laminating the polymeric isolation layer of the photosensitive element to a permanent support;(III) imagewise exposing the photosensitive element to actinic radiation through a color separation to form imaged and non-imaged areas and wherein the photosensitive layer exhibits increased adhesion to the second strippable substrate;(IV) developing the exposed photosensitive element by removing the second strippable substrate to form a colored image on the permanent support wherein removal requires a peel force P2; and(V) repeating steps (I) to (IV) at least once using a different photosensitive element and a different color separation, and in step (II), laminating the different photosensitive element to the permanent support having thereon a colored image formed in step (IV); wherein the polymeric isolation layer from the different photosensitive element is adjacent the colored image formed in step (IV).