Warm image tone providing photographic element
AssigneeEastman Kodak Company
InventorJohn T. Landon, Jr.
Life of this patent
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Abstract
A photographic element containing an incorporated developing agent is disclosed which forms a photographic print having a warm image tone upon successive processing in an alkaline activator bath and a stabilizer bath. The element is comprised of a reflective nonporous support bearing a silver halide emulsion layer which forms a viewable silver image therein upon processing. The emulsion layer contains an azaindene antifoggant. The element additionally contains in or adjacent the emulsion layer a warm image tone providing mixture of a quaternary ammonium salt and a silver salt of a heterocyclic mercaptan.
Claims16
A photographic element containing an incorporated developing agent and which forms a warm image tone photographic print upon successive processing in an akaline activator bath and a stabilizer bath, said element comprising
- a white reflective non-porous support,
- a silver halide emulsion layer which forms a viewable continuous tone silver image therein upon processing, wherein said silver halide is comprised of greater than 50 mole percent chloride, up to 5 mole percent iodide and the remainder bromide based on total halide, said layer additionally containing from 1 to 20 grams per mole of silver halide of an azaindene antifoggant, and
- in said emulsion layer or in a layer adjacent thereto, a mixture of from 1 to 10 mg per 0.1 meter.sup.2 of a quaternary ammonium salt and from 1 to 10 mg per 0.1 meter.sup.2 of a silver salt of a heterocyclic mercaptan represented by the general formula ##STR7## wherein Q represents the atoms necessary to complete a five-or six-membered heterocyclic ring.
A multilayer photographic element which forms a warm image tone photographic print upon successive processing in an alkaline activator bath and a stabilizer bath following imagewise exposure comprising
- a resin-coated paper support,
- a silver halide emulsion layer which forms a viewable continuous tone silver image therein upon processing, wherein said silver halide is comprised of greater than 50 mole percent chloride, up to 5 mole percent iodide and the remainder bromide, based on total halide, said layer additionally containing from 1 to 20 grams per mole of silver halide of a tetraazaindene antifoggant,
- a layer located adjacent said emulsion layer comprising a mixture of 0.5 to 5.0 mg per 0.1 square meter of a pyridinium salt and from 1 to 10 mg per 0.1 square meter of a silver salt of a heterocyclic mercaptan represented by the general formula ##STR8## wherein Q represents the atoms necessary to complete a tetrazole or thiazole ring, and
- a hydroquinone developing agent located in at least one of said layers in an amount of from 50 to 200 mg per 0.1 squiare meter.
Dependencies are inferred from the claim text.