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US 5,292,622 AGranted
Process for preparation of images on tonable light-sensitive layers
AssigneeE. I. Du Pont de Nemours and Company
InventorsBernhard Metzger, Helmut H. Frohlich
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Abstract
A process for preparing images on a tonable, light-sensitive layer using a transfer layer containing at least 20 percent by weight of a toner and a polymer with a maximum tensile strength of at least 2 N/mm.sup.2 as a binder. The pigmented transfer layers can be used in color proofing processes requiring high resolution, reproducible color density and low dot gain.
Claims6
A process for preparing multi-color images which comprises:
- (a) applying a light-sensitive layer onto a support;
- (b) exposing imagewise the light-sensitive layer to actinic radiation to produce tacky and non-tacky areas;
- (c) contacting the exposed layer with a light-insensitive transfer layer on a support, the transfer layer consisting essentially of (i) at least one polymer with a tensile strength in the range of 5-60 N/mm.sup.2 and (ii) at least 20 percent by weight based on the dry transfer layer of at least one finely divided powder or a combination of a finely divided powder and at least one dissolved dye;
- (d) removing the support of the transfer layer together with the areas of the transfer layer which do not adhere to the tacky areas of the imagewise exposed layer;
- (e) applying a new light-sensitive layer onto the existing image;
- and
- (f) repeating steps (b) through (e) at least twice.
4 more elements
Dependencies are inferred from the claim text.