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US 5,702,865 AGranted
Method of forming photographic relief images
AssigneeEastman Kodak Company
InventorMichael John Simons
Life of this patent
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Abstract
Relief images can be formed in photographic elements having a tanning developing agent incorporated therein. The tanning developing agents have the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each an alkyl group of at least 3 carbon atoms, or an aryl group, After exposure, the material is treated with an alkaline solution and unhardened areas are removed.
Claims6
A method of forming a relief image comprising:
- A) imagewise exposing a photographic silver halide material that comprises a support bearing at least one silver halide emulsion and, having incorporated in the emulsion layer or a layer adjacent thereto a tanning developing agent of the formula:
- ##STR9## wherein R.sup.1 and R.sup.2 are each an alkyl group of at least 3 carbon atoms, or an aryl group,
- B) treating said material with an alkaline solution having a pH greater than 9, thereby hardening developing areas of said material, and
- C) treating said material with an aqueous medium to remove unhardened areas.
1 more element
Dependencies are inferred from the claim text.