GB1278744A - Colour developing compositions - Google Patents
Colour developing compositionsInfo
- Publication number
- GB1278744A GB1278744A GB9250/70A GB925070A GB1278744A GB 1278744 A GB1278744 A GB 1278744A GB 9250/70 A GB9250/70 A GB 9250/70A GB 925070 A GB925070 A GB 925070A GB 1278744 A GB1278744 A GB 1278744A
- Authority
- GB
- United Kingdom
- Prior art keywords
- colour developing
- colour
- developing agent
- carboxyl
- antioxidants
- 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
- 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
- G03C7/407—Development processes or agents therefor
- G03C7/413—Developers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
1278744 Photographic colour developer composition EASTMAN KODAK CO 26 Feb 1970 [27 Feb 1969] 9250/70 Heading G2C A colour photographic developer composition comprises a primary aromatic amine colour developing agent and an antioxidant having the formula R<SP>1</SP>-CH(OH)-CO-R in which R is H, carboxyl, alkyl having 1 or 2 C atoms, or hydroxy alkyl having 1 or 2 C atoms and R<SP>1</SP> is H, carboxyl, hydroxymethyl or formyl, such that when R is carboxyl, R<SP>1</SP> is not a hydroxymethyl group and such that the compound is capable of existing in equilibrium as an enol form and is not capable of intramolecular cyclization. Concentration of the above compound is in the range 0À1-20 g/l and of the developing agent, 0À5-14 g/l. Typical of the above compounds are dihydroxyacetone, glycolaldehyde, glyceraldehyde, and dihydroxymaleic acid. The composition may contain water, an alkali e.g. an alkali metal tetraborate, an alkali metal sulphite, a diffusible dye forming coupler, a silver halide solvent, an antifoggant, a diffusible competing coupler or a thickening agent e.g. a carboxy (lower alkyl) substituted cellulose. Numerous colour developing agents are listed. These colour developing compositions give better photographic speeds and densities than those containing either no antioxidants or known antioxidants. These antioxidants are not silver halide solvents and prevent loss of colour developing agent due to aerial oxidation and also of coupler which would otherwise couple with the aerially oxidized colour developing agent.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80309769A | 1969-02-27 | 1969-02-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1278744A true GB1278744A (en) | 1972-06-21 |
Family
ID=25185572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9250/70A Expired GB1278744A (en) | 1969-02-27 | 1970-02-26 | Colour developing compositions |
Country Status (4)
Country | Link |
---|---|
US (1) | US3615503A (en) |
CA (1) | CA966711A (en) |
FR (1) | FR2033083A5 (en) |
GB (1) | GB1278744A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2214322A (en) * | 1988-01-20 | 1989-08-31 | Agfa Gevaert Ag | A photographic colour developer |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52102727A (en) * | 1976-02-24 | 1977-08-29 | Fuji Photo Film Co Ltd | Treatment for color photography |
US4168166A (en) * | 1977-11-09 | 1979-09-18 | Polaroid Corporation | Photographic processing composition comprising borate |
US4426441A (en) | 1982-12-03 | 1984-01-17 | Eastman Kodak Company | Dye-forming developers in an imaging material and process |
JPH06105345B2 (en) * | 1986-07-21 | 1994-12-21 | 富士写真フイルム株式会社 | Color photographic developer composition and method for processing silver halide color photographic light-sensitive material |
JPH073570B2 (en) * | 1986-08-07 | 1995-01-18 | 富士写真フイルム株式会社 | Processing method of silver halide color photographic light-sensitive material |
US4966834A (en) * | 1987-09-03 | 1990-10-30 | Fuji Photo Film Co., Ltd. | Method for processing a silver halide color photographic material |
WO1991014379A1 (en) * | 1990-03-26 | 1991-10-03 | Red Arrow Products Company Inc. | Process for producing hydroxyacetaldehyde |
JP3372994B2 (en) | 1993-06-11 | 2003-02-04 | 富士写真フイルム株式会社 | Processing method of silver halide color photographic light-sensitive material |
US5534395A (en) | 1994-06-09 | 1996-07-09 | Fuji Photo Film Co., Ltd. | Method of processing silver halide color photographic materials |
US7611829B2 (en) | 2004-01-30 | 2009-11-03 | Fujifilm Corporation | Silver halide color photographic light-sensitive material and color image-forming method |
-
1969
- 1969-02-27 US US803097*A patent/US3615503A/en not_active Expired - Lifetime
-
1970
- 1970-01-14 CA CA072,083A patent/CA966711A/en not_active Expired
- 1970-02-26 FR FR7006877A patent/FR2033083A5/fr not_active Expired
- 1970-02-26 GB GB9250/70A patent/GB1278744A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2214322A (en) * | 1988-01-20 | 1989-08-31 | Agfa Gevaert Ag | A photographic colour developer |
GB2214322B (en) * | 1988-01-20 | 1991-10-23 | Agfa Gevaert Ag | A photographic colour developer |
Also Published As
Publication number | Publication date |
---|---|
US3615503A (en) | 1971-10-26 |
CA966711A (en) | 1975-04-29 |
FR2033083A5 (en) | 1970-11-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |