Photographic peracid bleaching composition, processing kit, and method of use
AssigneeEastman Kodak Company
InventorsShirleyanne E. Haye, Janet M. Huston
Life of this patent
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Abstract
A composition for photographic bleaching contains a peracid bleaching agent such as a peroxide, persulfate, or periodate, and a cyclicaminomethanediphosphonic acid or a salt thereof as a stabilizing compound. This bleaching composition can also include a fixing agent, and can be used to provide color photographic images in various color photographic materials.
Claims20
A composition for photographic bleaching comprising at least 0.005 mol/l of a peracid bleaching agent or a compound that generates or provides a peracid bleaching agent, and at least 0.00005 mol/l of a cyclicaminomethanediphosphonic acid or a salt thereof.
A composition for photographic bleaching having a pH of from about 1 to about 11, and comprising:
- from about 0.01 to about 3 mol/l of hydrogen peroxide or a compound that provides hydrogen peroxide as a photographic bleaching agent,
- from about 0.0001 to about 0.25 mol/l of morpholinomethanediphosphonic acid or a salt thereof, and
- optionally, one or more additional polyaminopolyphosphonic acids or salts thereof.
A photographic processing kit comprising:
- A) a first composition comprising a peracid bleaching agent or a compound that generates or provides a peracid bleaching agent, and
- B) a second composition comprising a cyclicaminomethanediphosphonic acid or a salt thereof.
A method of providing a color image comprising contacting a color photographic material with a composition for photographic bleaching comprising at least 0.005 mol/l of a peracid bleaching agent or a compound that generates or provides a peracid bleaching agent, and at least 0.00005 mol/l of a cyclicaminomethanediphosphonic acid or a salt thereof.
A method of photographic processing comprising:
- A) contacting a color photographic material with a color developing composition, and
- B) contacting said color photographic material with a composition for photographic bleaching comprising at least 0.005 mol/l of a peracid bleaching agent or a compound that generates or provides a peracid bleaching agent, and at least 0.00005 mol/l of a cyclicaminomethanediphosphonic acid or a salt thereof.
Dependencies are inferred from the claim text.