Stabilized amplified color developing composition, multi-part kits, and method of use
AssigneeEastman Kodak Company
InventorsShirleyanne E. Haye, Janet M. Huston, Richard R. Horn, Anthony Jarkowski
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Abstract
An amplified color developing composition is stabilized with a cyclicaminomethanediphosphonic acid or salt thereof alone of in combination with other stabilizing compounds. This composition also comprises a color developing agent, a redox oxidizing agent (such as hydrogen peroxide), and a hydroxylamine antioxidant for the color developing agent. The amplified color developing composition can be formulated using a two- or three-part processing kit. The composition can be used to provide images in various color photographic silver halide materials such as color photographic papers.
Claims20
A stabilized photographic amplified color developing composition that comprises:
- a) at least 0.001 mol/l of a color developing agent,
- b) at least 0.005 mol/l of a redox oxidizing agent,
- c) at least 0.001 mol/l of a hydroxylamine antioxidant, and
- d) at least 0.0005 mol/l of a cyclicaminomethanediphosphonic acid or a salt thereof.
An aqueous redox amplification composition having a pH of from about 10 to about 12 and comprising:
- a) from about 0.001 to about 1 mol/l of a color developing agent that is 4-(N-ethyl-N-β-hydroxyethylamino)-2-methylaniline sulfate (KODAK Color Developing Agent CD-4) or 4-(N-ethyl-N-2-methanesulfonylaminoethyl)-2-methylphenylenediamine sesquisulfate (KODAK Color Developing Agent CD-3),
- b) from about 0.001 to about 1 mol/l of hydroxylamine sulfate as an antioxidant for said color developing agent,
- c) from about 0.005 to about 5 mol/l of hydrogen peroxide or a compound that provides hydrogen peroxide, and
- d) from about 0.0005 to about 0.5 mol/l of morpholinomethanediphosphonic acid or a salt thereof.
A method for providing a color image comprising contacting an imagewise exposed color photographic element with a stabilized amplified color developing composition that comprises:
- a) at least 0.001 mol/l of a color developing agent,
- b) at least 0.005 mol/l of a redox oxidizing agent,
- c) at least 0.001 mol/l of a hydroxylamine antioxidant, and
- d) at least 0.0005 mol/l of a cyclicaminomethanediphosphonic acid or a salt thereof.
A method for providing a color image comprising contacting an imagewise exposed color photographic element with a stabilized photographic redox amplification composition that has a pH of from about 10 to about 12 and comprises:
- a) from about 0.001 to about 1 mol/l of a color developing agent that is 4-(N-ethyl-N-β-hydroxyethylamino)-2-methylaniline sulfate (KODAK Color Developing Agent CD-4) or 4-(N-ethyl-N-2-methanesulfonylaminoethyl)-2-methylphenylenediamine sesquisulfate (KODAK Color Developing Agent CD-3),
- b) from about 0.001 to about 1 mol/l of hydroxylamine sulfate as an antioxidant for said color developing agent,
- c) from about 0.005 to about 5 mol/l of hydrogen peroxide or a compound that provides hydrogen peroxide, and
- d) from about 0.0005 to about 0.5 mol/l of morpholinomethanediphosphonic acid or a salt thereof.
A method of photographic processing comprising the steps of:
- A) contacting an imagewise exposed color photographic silver halide element with a stabilized amplified color developing composition that comprises:
- a) at least 0.001 mol/l of a color developing agent,
- b) at least 0.005 mol/l of a redox oxidizing agent,
- c) at least 0.001 mol/l of a hydroxylamine antioxidant, and
- d) at least 0.0005 mol/l of a cyclicaminomethanediphosphonic acid or a salt thereof, and
- B) desilvering said color developed color photographic silver halide element.
A photographic processing kit comprising:
- A) a first solution comprising a color developing agent, a cyclicaminomethanediphosphonic acid or salt thereof, and a hydroxylamine antioxidant, and
- B) a second solution that comprises a redox oxidizing agent.
A photographic processing kit comprising:
- A) a first solution that comprises a color developing agent,
- B) a second solution that comprises a cyclicaminomethanediphosphonic acid or salt thereof, and
- C) a third solution that comprises a redox oxidizing agent, said first or second solution, or both, further comprising a hydroxylamine antioxidant.
Dependencies are inferred from the claim text.