Claims
- 1. A method for processing an imagewise exposed silver halide photographic product comprising black-and-white developing said photographic product with an inorganic photographic developing composition consisting essentially of at least 0.05M of at least one inorganic black-and-white developing agent that is an oxidizable metallic ion capable of reducing silver ions to silver metal, ethylenediamine tetraacetic acid, and at least one additional complexing agent of formula (I): ##STR9## wherein R.sup.1 and R.sup.2 are each independently hydrogen, an alkyl group of 1 to 10 carbon atoms, hydroxyl, or hydroxyalkyl group,
- R.sup.3 is --COOM wherein M is hydrogen or a counter-ion, or --CONR.sup.4 R.sup.5 wherein R.sup.4 and R.sup.5 are each independently a hydrogen atom, or an alkyl group of 1 to 10 carbon atoms, and n, p and q are independently 1, 2 or 3,
- wherein the metallic ion/complexing agent molar ratio is between 1/1 and 1/10, and the molar concentration of said additional complexing agent (I) is equal to at least 10% of the total concentration of complexing agents.
- 2. The method of claim 1 wherein the concentration of said oxidizable metallic ions is between 0.05M and the solubility limit of said metallic ions in said composition.
- 3. The method of claim 1 wherein the concentration of said oxidizable metallic ions is between 0.1 and 0.5M, the total concentration of said complexing agents being such that the metallic ion/complexing agent molar ratio is between 1/2 and 1/4, and the concentration of said additional complexing agent (I) is equal to between 50% and 90% of the total concentration complexing agent.
- 4. The method of claim 1, wherein said additional complexing agent of formula (I) is such that at least one of the R.sup.3 groups is a --COOM group wherein M is hydrogen or a counter-ion.
- 5. The method of claim 1, wherein said additional complexing agent is .beta.-alanine diacetic acid, nitrilotriacetic acid, (acetamido)iminodiacetic acid, N,N-dicarboxyethylglycine acid, or(dimethylacetamido)iminodiacetic acid.
- 6. The method of claim 5, wherein said additional complexing agent is nitrilotriacetic acid.
- 7. The method of claim 1 wherein said oxidizable metallic ion or ions are titanium, iron, vanadium or chromium ions.
- 8. The method of claim 7 wherein said oxidizable metallic ion is titanium ion.
- 9. The method of claim 1 wherein said developing composition has a pH of from 3 to 6.
- 10. The method of claim 1 wherein said developing composition further includes a development inhibitor, anti-fogging agent, silver halide solvent, fixing agent, preservative, development accelerator or antioxidant.
- 11. The method of claim 1 wherein said additional complexing agent of formula (I) comprises at least 50% of the total concentration of said complexing agents.
- 12. The method of claim 1 further comprising a fixing step after said black-and-white development.
- 13. The method of claim 1 wherein said imagewise exposed silver halide photographic product is a radiographic film.
- 14. The method of claim 1 wherein said imagewise exposed silver halide photographic product is a black-and-white film or paper.
- 15. The method of claim 1 wherein said imagewise exposed silver halide photographic product is a color reversal film or paper.
- 16. The method of claim 1 wherein said imagewise exposed silver halide photographic product is a graphic arts film.
Priority Claims (1)
Number |
Date |
Country |
Kind |
95 02668 |
Mar 1995 |
FRX |
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Parent Case Info
This is a Divisional of application Ser. No. 08/609,803, filed Mar. 1, 1996, for COMPOSITION FOR DEVELOPING AN EXPOSED PHOTOGRAPHIC PRODUCT HAVING IMPROVED STABILITY IN AIR, recently allowed.
Foreign Referenced Citations (1)
Number |
Date |
Country |
1330602 |
Aug 1987 |
SUX |
Divisions (1)
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Number |
Date |
Country |
Parent |
609803 |
Mar 1996 |
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