Claims
- 1. A method of providing a black-and-white photographic image comprising:
- processing an imagewise exposed black-and-white silver halide photographic material with a black-and-white developing composition that is free of dihydroxybenzene developing agents, said developing composition having a pH of from 7 but less than 9, and comprising:
- an ascorbic acid developing agent,
- an auxiliary super-additive developing agent,
- borate as the sole buffer in an amount of at least 0.001 mol/l, and
- a preservative,
- provided the molar ratio of said ascorbic acid developing agent to said auxiliary super-additive developing agent is at least 10:1.
- 2. The method of claim 1 wherein said photographic material is a black-and-white photographic film.
- 3. The method of claim 1 wherein said aqueous black-and-white developing composition comprises sodium isoascorbate or sodium ascorbate, 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone, sodium sulfite, sodium metabisulfite, sodium borate and diethylenetriamine pentaacetic acid pentasodium salt.
- 4. The method of claim 1 wherein said black-and-white developing composition is also used as its own replenisher.
- 5. The method of claim 1 wherein the pH of said black-and-white developing composition is from 8 to 8.5.
- 6. The method of claim 5 wherein the pH of said black-and-white developing composition is from 8.1 to 8.4.
- 7. The method of claim 1 wherein said ascorbic acid developing agent is D- or L-ascorbic acid, isoascorbic acid, and alkali metal salt of any of these compounds, or any mixture thereof.
- 8. The method of claim 7 wherein said ascorbic acid developing agent is sodium ascorbate or sodium isoascrobate.
- 9. The method of claim 1 wherein said auxiliary super-additive developing agent is 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone, 1-phenyl-3-pyrazolidone, 4, 4-dimethyl-1-phenyl-3-pyrazolidone, or 1-phenyl-4,4-dihydroxymethyl-3-pyrazolidone.
- 10. The method of claim 1 wherein said ascorbic acid developing agent is present in said black-and-white developing composition in an amount of from about 0.01 to about 0.1 mol/l, said auxiliary super-additive developing agent is present in an amount of from about 2.5.times.10.sup.-4 to about 2.5.times.10.sup.31 2 mol/l, said borate buffer is present in an amount of from about 0.001 to about 0.2 mol/l, and said preservative is present in an amount of from about 0.4 to about 1.6 mol/l,
- provided that the molar ratio of said ascorbic acid developing agent to said auxiliary super-additive developing agent is from about 20:1 to about 50:1.
- 11. The method of claim 10 wherein said ascorbic acid developing agent is present in said black-and-white developing composition in an amount of from about 0.02 to about 0.07 mol/l, said auxiliary super-additive developing agent is present in an amount of from about 5.times.10.sup.-4 to about 2.times.10.sup.-3 mol/l, said borate buffer is present in an amount of from about 0.001 to about 0.16 mol/l, and said preservative is present in an amount of from about 0.4 to about 0.8 mol/l.
- 12. The method of claim 1 wherein said preservative is sulfite ion.
- 13. The method of claim 1 wherein said photographic material comprises a silver bromide or silver bromoiodide emulsion.
CROSS REFERENCE TO RELATED APPLICATION
This is a division of U.S. application Ser. No. 08/863,830, filed 27 May 1997 now U.S. Pat. No. 5,756,271, which is a Divisional of U.S. application Ser. No.08/674,497, filed 28 Jun. 1996, now U.S. Pat. No. 5,702,875 both allowed and entitled WEAKLY ALKALINE ASCORBIC ACID DEVELOPING COMPOSITION, PROCESSING KIT AND METHOD USING SAME.
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4840888 |
Kawasaki et al. |
Jun 1989 |
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4868098 |
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Divisions (2)
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Number |
Date |
Country |
Parent |
863830 |
May 1997 |
|
Parent |
674497 |
Jun 1996 |
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