Negative-working multilayer photosensitive tonable element
AssigneeE. I. Du Pont de Nemours and Company
InventorsAbraham B. Cohen, Roxy N. Fan
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Abstract
An improved peel apart photosensitive element comprises a strippable cover sheet, a photoadherent layer, and a tacky, nonphotosensitive contiguous layer receptive to colorant or particulate material, and a support. The element is useful in applications such as color proofing. Such elements are capable of producing reverse toned or colored images as well as duplicate colored images with greatly improved tonal range and image fidelity.
Claims32
A peel apart photosensitive element comprising in order from top to bottom, (1) a strippable cover sheet comprised of a polymeric film which is transparent to actinic radiation, (2) a photoadherent layer comprising a photohardenable material with ethylenically unsaturated or benzophenone type groups, and (3) a tacky, nonphotosensitive organic contiguous layer which is tonable by embedding of particulate material, and (4) a sheet support, the exposed areas (5) of said photoadherent layer, after imagewise exposure of said element to actinic radiation, having greater adhesion to said cover sheet than to said contiguous layer, and are removable with said cover sheet, and the unexposed areas (6) of said photoadherent layer having greater adhesion to said contiguous layer than to said cover sheet and are not removable with said cover sheet, said photoadherent layer being nontonable under a condition under which the contiguous layer is tonable.
Dependencies are inferred from the claim text.