GB1315896A - Photographic silver-bleaching composition - Google Patents
Photographic silver-bleaching compositionInfo
- Publication number
- GB1315896A GB1315896A GB3791271A GB3791271A GB1315896A GB 1315896 A GB1315896 A GB 1315896A GB 3791271 A GB3791271 A GB 3791271A GB 3791271 A GB3791271 A GB 3791271A GB 1315896 A GB1315896 A GB 1315896A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkyl
- water
- photographic silver
- bleaching composition
- composition
- 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
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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/40—Chemically transforming developed images
- G03C5/44—Bleaching; Bleach-fixing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
1315896 Photographic silver bleaching composition EASTMAN KODAK CO 12 Aug 1971 17 Aug 1970] 37912/71 Heading G2C A photographic silver bleaching composition comprises a nuclear substituted aromatic amine and either a water-soluble persulphate salt or a water-soluble nitrosodisulphonate salt in aqueous solution. The aromatic amine may have the formula: - wherein X and Y are each Hor 1-4C alkyl; and R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>, R<SP>4</SP> and R<SP>5</SP> are each H, an amino group, OH, 1-4C alkyl, mono (1-4C alkyl) amino, or di (1-4C alkyl) amino providing that at least one of the groups R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>, R<SP>4</SP> and R<SP>5</SP> is not H. The water-soluble salts may be of ammonium or an alkali metal such as sodium, potassium or lithium. The composition may be buffered in the range from 1À9 to 9, e.g. 6. The composition may contain an alkali metal bromide. The compositions may be used to bleach silver in black and white or colour materials, without affecting image dyes or otherwise causing stains or water pollution when exhausted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6462570A | 1970-08-17 | 1970-08-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1315896A true GB1315896A (en) | 1973-05-02 |
Family
ID=22057217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3791271A Expired GB1315896A (en) | 1970-08-17 | 1971-08-12 | Photographic silver-bleaching composition |
Country Status (4)
Country | Link |
---|---|
US (1) | US3707374A (en) |
CA (1) | CA966350A (en) |
FR (1) | FR2104270A5 (en) |
GB (1) | GB1315896A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5525412B2 (en) * | 1973-06-11 | 1980-07-05 | ||
JPS5883852A (en) * | 1981-11-13 | 1983-05-19 | Fuji Photo Film Co Ltd | Method for bleaching color photographic material |
JPH06214365A (en) * | 1992-12-14 | 1994-08-05 | Eastman Kodak Co | Bleaching accelerator, bleaching composition and photographic element |
US5510232A (en) * | 1994-12-22 | 1996-04-23 | Eastman Kodak Company | Photographic processing composition and method using cationic hydroquinone as organic catalyst for persulfate bleaching agent |
DE19549103A1 (en) * | 1995-12-29 | 1997-07-03 | Agfa Gevaert Ag | Bleach bath for black and white photographic material |
-
1970
- 1970-08-17 US US64625A patent/US3707374A/en not_active Expired - Lifetime
-
1971
- 1971-07-15 CA CA118,324A patent/CA966350A/en not_active Expired
- 1971-08-12 FR FR7129512A patent/FR2104270A5/fr not_active Expired
- 1971-08-12 GB GB3791271A patent/GB1315896A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2141199A1 (en) | 1972-03-09 |
US3707374A (en) | 1972-12-26 |
FR2104270A5 (en) | 1972-04-14 |
DE2141199B2 (en) | 1977-05-18 |
CA966350A (en) | 1975-04-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |