Claims
- 1. A photographic processing composition adapted for use with a silver diffusion transfer film unit which comprises an aqueous alkaline solution having a pH of at least about 12, a silver halide developing agent, a silver halide solvent and a borate which is soluble in said aqueous alkaline solution wherein said borate is present at a level of about 0.25 mmol to 15 mmol of boron per 10 cc of processing composition.
- 2. The composition of claim 1 wherein said borate is sodium tetraborate decahydrate.
- 3. The composition of claim 2 wherein said sodium tetraborate decahydrate is present at a level of about 0.75 to 5 mmol of boron per 10 cc of said composition.
- 4. The composition as defined in claim 3 wherein said sodium borate decahydrate is present at a level of about 1 mmol of boron per 10 cc of said processing composition.
- 5. The composition of claim 1 wherein said silver halide developing agent is tetramethyl reductic acid.
- 6. The composition of claim 1 wherein said silver halide solvent is 2-methylthiomethyl-4,6-dihydroxypyrimidine.
- 7. The composition as defined in claim 1 which includes a polymeric thickening agent.
- 8. The composition of claim 1 wherein said film unit is an additive color diffusion transfer film unit.
- 9. A photographic processing composition having a pH of at least about 12 adapted for use with an additive color diffusion transfer film unit which comprises an aqueous sodium hydroxide solution, tetramethyl reductic acid, 2-methylthiomethyl-4,6-dihydroxy-pyrimidine, hydroxyethyl cellulose and sodium tetraborate decahydrate wherein said sodium tetraborate is present at a level of about 1 mmol per 10 cc of said composition.
- 10. The method which comprises contacting an exposed silver diffusion transfer film unit which comprises a support, carrying on one surface, a layer comprising silver-precipitating nuclei, and a silver halide layer; with a photographic processing composition comprising an aqueous alkaline solution having a pH of at least about 12, a silver halide developing agent, a silver halide solvent and a borate which is soluble in said aqueous alkaline solution; said borate being present at a level of about 0.25 mmol to 15 mmol of boron per 10 cc of said processing composition.
- 11. The method of claim 10 wherein said borate is sodium tetraborate decahydrate.
- 12. The method of claim 11 wherein said sodium borate is present at a level of about 1 mmol of borate per 10 cc of said processing composition.
- 13. The method of claim 10 which includes the step of drying said film unit without removing said processing composition.
- 14. The method of claim 10 wherein said film unit includes an additive color screen.
- 15. The method of claim 10 wherein said silver precipitating nuclei are noble metal nuclei.
- 16. The method of claim 15 wherein said noble metal nuclei are palladium nuclei.
- 17. The method of claim 10 wherein said processing composition includes a polymeric thickener.
- 18. The method of claim 17 wherein said polymeric thickener is hydroxyethyl cellulose.
- 19. The method which comprises contacting an additive color diffusion transfer film unit which comprises a transparent support carrying, in order, an additive color screen; a layer comprising palladium metal silver precipitating nuclei and gelatin; a photosensitive silver halide emulsion layer; and an anti-halation layer with a processing composition comprising an aqueous sodium hydroxide solution, having a pH of at least about 12, hydroxyethyl cellulose, tetramethyl reductic acid, 2-methylthiomethyl-4,6-dihydroxy-pyrimidine, hydroxyethyl cellulose and sodium tetraborate decahydrate at a level of about 4.2 mmol of boron per 10 cc of said processing composition.
CROSS REFERENCE TO OTHER APPLICATIONS
This application is a continuation-in-part of of copending application Ser. No. 849,963, filed Nov. 9, 1977 now abandoned.
US Referenced Citations (21)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
849963 |
Nov 1977 |
|