GB617223A - Improvements in and relating to colour photography - Google Patents
Improvements in and relating to colour photographyInfo
- Publication number
- GB617223A GB617223A GB24887/46A GB2488746A GB617223A GB 617223 A GB617223 A GB 617223A GB 24887/46 A GB24887/46 A GB 24887/46A GB 2488746 A GB2488746 A GB 2488746A GB 617223 A GB617223 A GB 617223A
- Authority
- GB
- United Kingdom
- Prior art keywords
- group
- couplers
- coupler
- acid
- glucose
- 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
- G03C7/32—Colour coupling substances
- G03C7/333—Coloured coupling substances, e.g. for the correction of the coloured image
- G03C7/3335—Coloured coupling substances, e.g. for the correction of the coloured image containing an azo chromophore
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S534/00—Organic compounds -- part of the class 532-570 series
- Y10S534/08—Elimination of groups during the preparation of azo compounds
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
617,223. Coloured photographic images. GEVAERT PHOTO-PRODUCTEN N. V., and BEERSMANS, J. Aug. 21, 1946, No. 24887. [Class 98 (ii)] A reducible silver salt image is developed by an aromatic developing agent in presence of a coupler containing a reactive methylene group immediately linked to an azo group and either to a group known to be capable of activating the methylene group optionally in co-operation with another such activating group or to a -CH-OH group, the reactive methylene group being optionally substituted by a group split off before or during development, the coupler coupling with the oxidation product of the developing agent to form a dye containing the azo group. The coupling may also be present in its tautomeric hythrazone form. Material containing the coupler may also be processed by methods involving the step of forming a dye by coupling the coupler with a nitroso-aniline or a diazo compound. Couplers specified containing an azo group are benzeneazoacetone, alpha - benzeneazoacetoacetic acid, . benzeneazocyanacetic acid, benzeneazoacetonitrile, p - nitrobenzeneazocyanacetic acid, benzeneazonitromethane, x - naphthaleneazo - cyanacetic acid, p-benzeneazobenzeneazoacetonitrile, diphenylene-p:p<1>-bis-(azoacetonitrile), and bis-(benzeneazo)-acetonitrile. Couplers specified containing a hydrazone group are lactose-, maltose- and l-arabinose-phenylhydrazone, d-glucose-p-tolylhydrazone, d-glucose-, 2 : 5 - dichlorophenylhydrazone, d - glucose - o - methoxyphenylhydrazone, and l-arabinose-pbromophenylhydrazone. The couplers may be incorporated in the developing solution, in a silver halide emulsion, or in a layer coated next thereto or separated therefrom only by a thin water-permeable layer. The couplers may be tendered fast-to-diffusion by the incorporation of chains of more than 5 carbon atoms or by diphenyl groups. Formulµ are given for, developing solutions containing the couplers one such solution containing hydroquinone as developing agent.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE475466D BE475466A (en) | 1946-08-21 | ||
NL79214D NL79214C (en) | 1946-08-21 | ||
GB24887/46A GB617223A (en) | 1946-08-21 | 1946-08-21 | Improvements in and relating to colour photography |
US768936A US2515691A (en) | 1946-08-21 | 1947-08-15 | Azo dyestuffs as photographic coupling components |
FR952230D FR952230A (en) | 1946-08-21 | 1947-08-21 | Process for the production of color photographic images |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB24887/46A GB617223A (en) | 1946-08-21 | 1946-08-21 | Improvements in and relating to colour photography |
Publications (1)
Publication Number | Publication Date |
---|---|
GB617223A true GB617223A (en) | 1949-02-02 |
Family
ID=10218820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24887/46A Expired GB617223A (en) | 1946-08-21 | 1946-08-21 | Improvements in and relating to colour photography |
Country Status (5)
Country | Link |
---|---|
US (1) | US2515691A (en) |
BE (1) | BE475466A (en) |
FR (1) | FR952230A (en) |
GB (1) | GB617223A (en) |
NL (1) | NL79214C (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE625541A (en) * | 1961-12-01 | |||
US3755289A (en) * | 1970-03-25 | 1973-08-28 | Kansai Paint Co Ltd | 2-(phenylazo)-2,4-dimethyl and 2-(phenylazo)-2,4-dimethyl-4-alkoxy valeronitriles |
US5417613A (en) * | 1993-12-06 | 1995-05-23 | Dana Corporation | Bearing cup retainer for universal joint |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB503824A (en) * | 1936-07-07 | 1939-04-11 | Kodak Ltd | Process of colour photography |
US2434272A (en) * | 1944-05-03 | 1948-01-13 | Eastman Kodak Co | Color photography with azosubstituted couplers |
US2453661A (en) * | 1944-05-03 | 1948-11-09 | Eastman Kodak Co | Colored couplers |
BE476360A (en) * | 1944-05-03 | |||
US2455170A (en) * | 1944-05-03 | 1948-11-30 | Eastman Kodak Co | Colored couplers |
US2435616A (en) * | 1944-07-07 | 1948-02-10 | Eastman Kodak Co | Elimination coupling with azosubstituted couplers |
-
0
- NL NL79214D patent/NL79214C/xx active
- BE BE475466D patent/BE475466A/xx unknown
-
1946
- 1946-08-21 GB GB24887/46A patent/GB617223A/en not_active Expired
-
1947
- 1947-08-15 US US768936A patent/US2515691A/en not_active Expired - Lifetime
- 1947-08-21 FR FR952230D patent/FR952230A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL79214C (en) | |
BE475466A (en) | |
US2515691A (en) | 1950-07-18 |
FR952230A (en) | 1949-11-14 |
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