GB1319721A - Photographic silver bleaching baths - Google Patents
Photographic silver bleaching bathsInfo
- Publication number
- GB1319721A GB1319721A GB1207371A GB1207371A GB1319721A GB 1319721 A GB1319721 A GB 1319721A GB 1207371 A GB1207371 A GB 1207371A GB 1207371 A GB1207371 A GB 1207371A GB 1319721 A GB1319721 A GB 1319721A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- bath
- bleaching
- photographic silver
- hardening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004061 bleaching Methods 0.000 title abstract 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title abstract 3
- 229910052709 silver Inorganic materials 0.000 title abstract 3
- 239000004332 silver Substances 0.000 title abstract 3
- 239000007800 oxidant agent Substances 0.000 abstract 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- DWFUTNJGNBYHNN-UHFFFAOYSA-N 2,2,4-trimethylhexanedioic acid Chemical compound OC(=O)CC(C)CC(C)(C)C(O)=O DWFUTNJGNBYHNN-UHFFFAOYSA-N 0.000 abstract 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 abstract 1
- 239000001361 adipic acid Substances 0.000 abstract 1
- 235000011037 adipic acid Nutrition 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- 235000011126 aluminium potassium sulphate Nutrition 0.000 abstract 1
- 159000000013 aluminium salts Chemical class 0.000 abstract 1
- 229940040526 anhydrous sodium acetate Drugs 0.000 abstract 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract 1
- 239000004327 boric acid Substances 0.000 abstract 1
- 235000010338 boric acid Nutrition 0.000 abstract 1
- 239000000872 buffer Substances 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 abstract 1
- 230000009918 complex formation Effects 0.000 abstract 1
- 150000001991 dicarboxylic acids Chemical class 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910021645 metal ion Inorganic materials 0.000 abstract 1
- 239000004848 polyfunctional curative Substances 0.000 abstract 1
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000001632 sodium acetate Substances 0.000 abstract 1
- 235000017281 sodium acetate Nutrition 0.000 abstract 1
- 239000001509 sodium citrate Substances 0.000 abstract 1
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 abstract 1
- 229940038773 trisodium citrate Drugs 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/42—Bleach-fixing or agents therefor ; Desilvering processes
- G03C7/421—Additives other than bleaching or fixing agents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
1319721 Photographic silver image bleaching baths AGFA-GEVAERT AG 29 April 1971 [ 2 May 1970] 12073/71 Heading G2C A photographic silver bleaching bath contains an oxidising agent and a dicarboxylic acid of the formula: - COOH wherein n, m or p are 1,2 or 3 provided that n+m+p is less than or equal to 5; and R 1 , R 2 , R 3 or R 4 which may be the same or different, is H or alkyl having up to 5 carbon atoms and has a pH of from 5À0 to 6À5. The oxidizing agent is preferably a complex ferric salt. The acid may be glutanic acid, adipic acid or 2,2,4-trimethyladipic acid. The bath may contain sodium acetate or trisodium citrate which keep in solution aluminium salts, carried over from a preceding hardening bath, by complex formation. In Example 3 a stop-hardening bath is used before bleaching and after negative colour development which contains anhydrous sodium acetate, potash alum, boric acid and 1-(p-sulphophenyl)-3-methyl- 4-(d-ethylpropyl)-pyrazol-5-one as white coupler. The dicarboxylic acids are buffers which do not form aparingly soluble salts with trivalent metal ions (to prevent precipitation of inorganic hardeners) have little or no complex-forming action on Cr(III) and Al(III) ions (to prevent reversal of hardening of a layer of the material) and are resistant to the oxidizing agents in the bleaching bath.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702021518 DE2021518A1 (en) | 1970-05-02 | 1970-05-02 | Photographic bleach and bleach-fix baths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1319721A true GB1319721A (en) | 1973-06-06 |
Family
ID=5770041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1207371A Expired GB1319721A (en) | 1970-05-02 | 1971-04-29 | Photographic silver bleaching baths |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE766510A (en) |
| DE (1) | DE2021518A1 (en) |
| FR (1) | FR2091025A5 (en) |
| GB (1) | GB1319721A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991011753A1 (en) * | 1990-01-24 | 1991-08-08 | Eastman Kodak Company | Photographic bleaching solution and use thereof in photographic color processing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3789249T2 (en) * | 1986-04-23 | 1994-06-16 | Konishiroku Photo Ind | Process for the treatment of a light-sensitive color photographic halide material. |
-
1970
- 1970-05-02 DE DE19702021518 patent/DE2021518A1/en active Pending
-
1971
- 1971-04-29 GB GB1207371A patent/GB1319721A/en not_active Expired
- 1971-04-30 BE BE766510A patent/BE766510A/en unknown
- 1971-04-30 FR FR7115653A patent/FR2091025A5/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991011753A1 (en) * | 1990-01-24 | 1991-08-08 | Eastman Kodak Company | Photographic bleaching solution and use thereof in photographic color processing |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2021518A1 (en) | 1971-12-02 |
| FR2091025A5 (en) | 1972-01-14 |
| BE766510A (en) | 1971-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |