Process for preparation of multilayer photosensitive solvent-processable litho element
AssigneeE. I. Du Pont de Nemours and Company
InventorRoxy Fan
Life of this patent
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Abstract
An improved photosensitive litho element comprises, in order, a support, a non-photosensitive solvent-soluble contiguous layer having an optical density of at least 3.0 in the visible region of the spectrum and a maximum thickness of 0.015 mm, and a solvent-processable photosensitive layer. Dot-etchable contact litho negatives and positives are provided.
Claims17
An image reproduction process which comprises imagewise exposing to actinic radiation a photosensitive litho element having in order from bottom to top a sheet support, a nonphotosensitive, solvent-soluble dye or pigment-containing layer having an optical density of at least 3.0 in the visible region of the spectrum and a maximum thickness of 0.015 mm, a solvent-processable nonsilver halide photosensitive layer, and optionally a cover sheet or overcoat layer;
- removing the cover sheet or overcoat layer, if present, washing out either the exposed or unexposed areas of the solvent-processable photosensitive layer and simultaneously or subsequently washing out the nonphotosensitive layer in the areas from which the photosensitive layer had been removed.
Dependencies are inferred from the claim text.