Eastman-kodak Company

Eric R Brown

David A Wilson

Stuart T Gordon

Druce K Crump

John M Buchanan

John R Fyson

Alan D Strickland

William G Henry

Keith H Stephen

Celia Ann DeAndrea

Mary Morris Podhorecki

A method of bleaching and fixing a developed silver halide color negative element comprising mixing a bleaching solution containing an oxidizing agent with a fixing solution containing a silver ion solubilizing agent to form a bleach-fixing solution; shortly after or simultaneously with said mixing, bleach/fixing the silver halide element by contacting it with the bleach/fixing solution; and discarding the bleach/fixing solution after one use; wherein the bleach/fixing step is performed at an elevated temperature; and wherein the silver halide color negative element comprises a silver bromoiodide emulsion with an average iodide content of more than 1 mol % iodide.

Bleach/fix solution for single-use silver removal in color negative films

Aminosuccinic acid chelants are disclosed which have been found to be applicable in photographic processes. The aminosuccinic acids can be used in a method of bleaching or bleach-fixing a silver halide photographic material comprising contacting the photographic material with a bleaching solution containing at least one metal complex of a polyamino disuccinic acid and one or more metal complexes of a polyamino monosuccinic acid or a monoamino monosuccinic acid.

Succinic acid derivative degradable chelants, uses and compositions

A composition for bleach-fixing a silver halide photographic element comprising a fixing agent and a ternary ferric-complex salt formed by a tetradentate ligand and a tridentate ligand and a method of bleach-fixing using said composition.

Photographic processing solution containing ternary ferric-complex salts

Succinic acid derivative degradable chelants, uses and composition

Polyamino monosuccinic acid chelants are disclosed which have been found to be applicable in photographic processes. The polyamino monosuccinic acids can be used in a method of bleaching or bleach-fixing a silver halide photographic material comprising contacting the photographic material with a bleaching solution containing a metal complex of a polyamino monosuccinic acid as a bleaching agent.

Polyamino monoesuccinates for use in photographic processes

A photographic bleaching or bleach/fixing composition contains a water-soluble ternary complex of an iron ion, a polycarboxylate ligand, and a second ligand which has at least one carboxyl group on an aromatic nitrogen heterocycle, such as a pyridinecarboxylic acid. Preferred materials are biodegradable, but all of the ternary complexes can be used in a variety of bleach or bleach/fix processes to good advantage as bleaching agents. They are particularly suitable for use in rehalogenating ferric chelate bleaches.

Photographic bleaching composition and processing method using ternary

A photographic peracid bleaching composition contains a peracid bleaching agent, and a water-soluble ternary complex of ferric ion, a polycarboxylate ligand, and a second ligand which has at least one carboxyl group on an aromatic nitrogen heterocycle, such as a pyridinecarboxylic acid. These complexes act as catalysts for the peracid bleaching agent. Preferred complexes are biodegradable, but all of the ternary complexes can be used in a variety of peracid bleaching processes to good advantage.

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Webster, NY, United States of America

Eric R Brown