Photohardenable elements with a non-tacky matte finish
AssigneeE. I. Du Pont de Nemours and Company
InventorsRussell H. Gray, August D. Kuchta
Life of this patent
Estimating the term…
Abstract
A photohardenable element useful, for example, in color proofing and the like, additionally containing a protective top-coat comprised of tacky material, e.g. a layer containing unexposed photohardenable monomer and plasticizer, said top-coat being dusted with a powdered material capable of rendering the layer non-tacky and suitable for further handling. The powdered material additionally gives the surface of the element a matte finish.
Claims4
A photosensitive element comprising, in order, (1) a sheet support, (2) at least one toned, image-bearing photohardenable layer, and (3) a photohardenable protective layer having on its surface a non-tacky matte finish comprising a particulate oil-absorbing material selected from the group consisting of diatomaceous silicas and cellulose acetates having an average particle size of 1 to 25 microns, which absorbs at least 100% by weight of oil based on the weight of particulate material in the photohardenable protective layer as determined by the Gardner-Coleman Method, A.S.T.M. D-1483-60 and which does not absorb incident light to a degree that the color or appearance of the image-bearing layer contiguous thereto is changed from the normal, said photohardenable layers being comprised of a material selected from photopolymerizable, photocrosslinkable, and photodimerizable materials.
Dependencies are inferred from the claim text.