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US4366232A
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Method for processing photographic silver dye-bleach materials and suitable preparations
Assignee: Ha Whitten & Co
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Filing: 1981-02-17
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Granted: 1982-12-28
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Expires: 2001-02-17
Abstract
Abstract A method for processing exposed and developed photographic silver dye-bleach materials, in which the exposed and developed material is treated with aqueous bleaching preparations which contain (a) an acid component, (b) a silver complexing agent, (c) one or more bleach catalysts, (d) optionally an antioxidant, (e) optionally a water-soluble oxidizing agent and (f) optionally a bleaching accelerator. A water-soluble and as a rule solid adduct of an acid amide or a lactam and a strong mineral acid is used as acid component (a).
Inventors
- 👤 Hansjorg Buser
- 👤 Adolf Morand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:59
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28; G03C5/00; G03C5/26; G03C5/40; G03C5/44
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
111 words
A method for processing exposed and developed photographic silver dye-bleach materials, by treating the exposed and developed material with aqueous bleaching preparations which contain (a) an adduct of an acid amide of a low-molecular aliphatic acid or of a monocylic aromatic acid or of a diamide of carbonic acid or thiocarbonic acid or of a lactam of γ- δ- or ε-aminoacids and a strong mineral acid, (b) a silver-complexing agent, (c) one or more bleach catalysts, (d), optionally an antioxidant, (e) optionally a water-soluble oxidising agent and (f) optionally a bleaching accelerator, wherein (a) is a solid water-soluble adduct of an acid amide of a lactam and a strong mineral acid.
Claim 2
Independent Claim
111 words
A method for processing exposed and developed photographic silver dye-bleach materials, by treating the exposed and developed material with aqueous bleaching preparations which contain (a) an adduct of an acid amide of a low-molecular aliphatic acid or of a monocylic aromatic acid or of a diamide of carbonic acid or thiocarbonic acid or of a lactam of γ- δ- or ε-aminoacids and a strong mineral acid, (b) a silver-complexing agent, (c) one or more bleach catalysts, (d), optionally an antioxidant, (e) optionally a water-soluble oxidising agent and (f) optionally a bleaching accelerator, wherein (a) is a solid water-soluble adduct of an acid amide of a lactam and a strong mineral acid.
Claim 3
Dependent Claim
24 words
A method according to claim 1, wherein the aqueous bleaching preparations are dye-bleaching or silver-bleaching baths, combined dye-bleaching and silver-bleaching baths or bleach-fixing baths.
Claim 4
Dependent Claim
35 words
A method according to claim 1, wherein component (a) is an adduct of urea, thiourea, formamide, dimethylformamide, acetamide, dimethylacetamide, 2-pyrrolidone, N-methyl-2-pyrrolidone or caprolactam and sulfuric acid, hydrochloric acid, nitric acid, perchloric acid or phosphoric acid.
Claim 5
Dependent Claim
29 words
A method according to claim 3, wherein component (a) is an adduct of urea and 0.5 or 1 mol of sulfuric acid or with 1 mol of nitric acid.
Claim 6
Dependent Claim
86 words
A method according to claim 1, wherein component (b) is thiourea or a water-soluble iodide, component (c) is a pyrazine, quinoxaline or phenazine compound, component (d) is a reductone or a water-soluble mercapto compound or an alkali metal, alkaline earth metal or ammonium bisulfite adduct of an organic carbonyl compound, component (e) is an aromatic mononitro or dinitro compound or an anthraquinonesulfonic acid and component (f) is a quaternary, substituted or unsubstituted piperidine, piperazine, pyrazine, quinoline or pyridine compound or also a tetraalkylammonium or alkylenediammonium compound.
Claim 7
Dependent Claim
24 words
A method according to claim 5, wherein component (b) is a sodium iodide, potassium iodide or ammonium iodide and component (d) is additionally used.
Claim 8
Dependent Claim
45 words
A method according to claim 5, wherein component (d) is a mercaptan of the formula H--S--C q H 2q --B, in which q is an integer with a value of from 2 to 12 and B is a sulfonic acid group or carboxylic acid group.
Claim 9
Dependent Claim
69 words
A method according to claim 1, wherein water-soluble tertiary phosphines of the formula ##STR8## in which W is --C r H 2r CN, --C r H 2r NO 2 or a substituted or unsubstituted aryl radical or a heterocyclic radical, r is 1 to 25, X is substituted or unsubstituted alkyl and Y is hydroxyalkyl, alkoxyalkyl, sulfoalkyl, aminoalkyl, phenyl, sulfophenyl or pyridyl, are used as components (f) and/or (d).
Claim 10
Dependent Claim
25 words
A method according to claim 1, wherein processing is carried out at temperatures of 20° to 90° C. and preferably of 20° to 60° C.
Claim 11
Dependent Claim
91 words
An aqueous preparation for processing exposed and developed photographic silver dye-bleach materials, which contains (a) an adduct of acid amide of a low-molecular aliphatic acid or of a monocyclic aromatic acid or of a lactam of γ- δ- or ε-aminoacids and a strong mineral acid, (b) a silver complexing agent, (c) one or more bleach catalysts, (d) optionally an antioxidant, (e) optionally a water-soluble oxidising agnet and (f) optionally a bleaching accelerator, wherein component (a) is a solid water-soluble adduct of an acid amide or lactam and a strong mineral acid.
Claim 12
Dependent Claim
91 words
An aqueous preparation for processing exposed and developed photographic silver dye-bleach materials, which contains (a) an adduct of acid amide of a low-molecular aliphatic acid or of a monocyclic aromatic acid or of a lactam of γ- δ- or ε-aminoacids and a strong mineral acid, (b) a silver complexing agent, (c) one or more bleach catalysts, (d) optionally an antioxidant, (e) optionally a water-soluble oxidising agnet and (f) optionally a bleaching accelerator, wherein component (a) is a solid water-soluble adduct of an acid amide or lactam and a strong mineral acid.
Claim 13
Dependent Claim
22 words
An aqueous preparation according to claim 10, wherein the dye-bleaching or silver-bleaching baths are combined dye-bleaching and silver-bleaching baths or bleach-fixing baths.
Claim 14
Dependent Claim
36 words
An aqueous preparation according to claim 10, wherein component (a) is an adduct of urea, thiourea, formamide, dimethylformamide, acetamide, dimethylacetamide, 2-pyrrolidone, N-methyl-2-pyrrolidone or caprolactam and sulfuric acid, hydrochloric acid, nitric acid, perchloric acid or phosphoric acid.
Claim 15
Dependent Claim
32 words
An aqueous preparation according to claim 12, wherein component (a) is an adduct of urea and 0.5 or 1 mol of sulfuric acid, or of urea with 1 mol of nitric acid.
Claim 16
Dependent Claim
89 words
An aqueous preparation according to claim 10, wherein component (b) is sodium iodide, potassium iodide or ammonium iodide, component (c) is a pyrazine, quinoxaline or phenazine compound, component (d) is a reductone or a water-soluble mercapto compound or an alkali metal, alkaline earth metal or ammonium bisulfite adduct of an organic carbonyl compound, component (e) is an aromatic mononitro or dinitro compound or an anthraquinonesulfonic acid and component (f) is a quaternary, substituted or unsubstituted piperidine, piperazine, pyrazine, quinoline or pyridine compound or also a tetraalkylammonium or alkylenediammonium compound.
Claim 17
Dependent Claim
55 words
An aqueous preparation according to claim 10, which contains 10 to 200 g/l of component (a), 2 to 50 g/l of component (b), 0.05 to 10 g/l of component (c), optionally 0.5 to 10 g/l of component (d), optionally 1 to 30 g/l of component (e) and optionally 1 to 5 g/l of component (f).
Claim 18
Dependent Claim
46 words
A concentrate for the preparation of an aqueous preparation according to claim 10, which contains components (a) to (c) and, optionally (d) to (f) in a concentration, per liter of concentrate, which is 2 to 20 times higher than the concentration in a ready-for-use aqueous preparation.
Claim 19
Dependent Claim
57 words
Partial concentrates for the preparation of an aqueous preparation according to claim 10, which comprise a concentrate containing components (a) and (e) and a second concentrate containing components (b), (c) and, optionally (d) and (f), the concentration of the components per liter of concentrate being 2 to 20 times higher than that in a ready-for-use aqueous preparation.
Claim 20
Dependent Claim
16 words
Partial concentrates according to claim 17, wherein the partial concentrates can be in the solid form.
Claim 21
Dependent Claim
44 words
A process for the preparation of an aqueous bleaching preparation according to claim 10, which comprises diluting a concentrate or partial concentrate according to claim 16 with water, or with a mixture of water and an organic solvent, to the concentration required for use.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |