Claims
- 1. A photographic color developing composition that, when in aqueous form, has a pH of from about 7 to about 13 and comprises:
a) at least 0.0005 mol/l of a color developing agent in free base form, b) at least 0.0005 mol/l of an antioxidant for said color developing agent, c) at least 0.0005 mol/l of a polyaminopolyphosphonic acid or salt thereof that has at least five phosphonic acid groups, and d) at least 0.00005 mol/l of a diphosphonic acid or salt thereof that is either: a hydroxyalkylidene disphosphonic acid or a salt thereof, or morpholinomethanedisphosphonic acid or a salt thereof.
- 2. The color developing composition of claim 1 having a pH of from about 8 to about 12.
- 3. The color developing composition of claim 1 wherein said color developing agent is present in an amount of from about 0.0005 to about 0.25 mol/l, and said antioxidant is present in an amount of from about 0.0005 to about 0.25 mol/l.
- 4. The color developing composition of claim 1 wherein said antioxidant is a hydroxylamine derivative having a solubilizing group.
- 5. The color developing composition of claim 4 wherein said antioxidant is represented by the structure I:
- 6. The color developing composition of claim 1 further comprising a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent that has a molecular weight of from about 50 to about 200.
- 7. The color developing composition of claim 6 further comprising a buffering agent that is soluble in said organic solvent.
- 8. The color developing composition of claim 7 wherein said buffering agent is a carbonate.
- 9. The color developing composition of claim 1 wherein said polyaminopolyphosphonic acid or salt thereof is present in an amount of from about 0.0005 to about 0.05 mol/l, and said diphosphonic acid or salt thereof is present in an amount of from about 0.00005 to about 0.001 mol/l.
- 10. The color developing composition of claim 1 wherein said polyaminopolyphosphonic acid or a salt thereof is represented by the Structure II:
- 11. The color developing composition of claim 10 wherein said divalent aliphatic linking groups independently have from 1 to 4 carbon atoms in the linking group chain.
- 12. The color developing composition of claim 11 wherein said polyaminopolyphosphonic acid or salt thereof is diethylenetriaminepentamethylenephosphonic acid or a salt thereof.
- 13. The color developing composition of claim 1 wherein said diphosphonic acid or salt thereof is a hydroxyalkylidene disphosphonic acid or a salt thereof is represented by Structure III:
- 14. The color developing composition of claim 13 wherein R3 is methyl or ethyl and M is hydrogen or an alkali metal ion.
- 15. The color developing composition of claim 1 wherein said diphosphonic acid or salt thereof is morpholinomethanedisphosphonic acid or a salt thereof.
- 16. The color developing composition of claim 1 comprising no purposely added lithium magnesium ions.
- 17. An aqueous color developing composition having a pH of from about 8 to about 12 and comprising:
a) from about 0.005 to about 0.03 mol/l of a color developing agent in free base form, b) from about 0.005 to about 0.05 mol/l of a hydroxylamine derivative antioxidant for said color developing agent, c) a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent that has a molecular weight of from about 100 to about 200, d) a carbonate buffering agent, e) from about 0.001 to about 0.01 mol/l of diethylenetriaminepentamethylenephosphonic acid or a salt thereof, and f) from about 0.0001 to about 0.0008 mol/l of a hydroxyethylidene-1,1-disphosphonic acid or a salt thereof.
- 18. A method for providing a color image in a color photographic silver halide element comprising contacting said element with the photographic color developing composition of claim 1.
- 19. A method of photographic processing comprising the steps of:
A) color developing an imagewise exposed color photographic silver halide element with the photographic color developing composition of claim 1, and B) desilvering said color developed color photographic silver halide element.
- 20. The method of claim 19 wherein said color photographic silver halide element is a color negative silver halide film.
- 21. The method of claim 19 wherein said photographic color silver halide element is a color paper.
- 22. The method of claim 19 carried out in a minilab.
COPENDING APPLICATION
[0001] Reference is made to copending and commonly assigned U.S. Ser. No. 09/______ filed on even date herewith by Buongiorne and Haight and entitled “Calcium Ion Stable Photographic Color Developing Concentrate and Method of Manufacture”.