GB500721A - Improvements in and relating to three-colour photography - Google Patents
Improvements in and relating to three-colour photographyInfo
- Publication number
- GB500721A GB500721A GB36871/38A GB3687138A GB500721A GB 500721 A GB500721 A GB 500721A GB 36871/38 A GB36871/38 A GB 36871/38A GB 3687138 A GB3687138 A GB 3687138A GB 500721 A GB500721 A GB 500721A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- colour
- sensitive
- layers
- yellow
- 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
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/815—Photosensitive materials characterised by the base or auxiliary layers characterised by means for filtering or absorbing ultraviolet light, e.g. optical bleaching
- G03C1/8155—Organic compounds therefor
-
- 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
- G03C7/26—Silver halide emulsions for subtractive colour processes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Optical Filters (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
- Display Devices Of Pinball Game Machines (AREA)
- Medicines Containing Plant Substances (AREA)
- Materials For Photolithography (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
500,721. Colour photography. KODAK, Ltd. May 10, 1937, No. 36871 /38. Convention date, May 9, 1936. Divided out of 500,826. [Class 98 (ii)] Colour developed reversed images are pro. duced in material comprising three silver halide emulsion layers on a single support of which the upper layer is not specifically colour sensitized and of which the middle and bottom layers contain colour sensitizers, that in the bottom layer at least being resistant to the action of developing agents, and having a yellow filter colouring matter not destroyed by development in the upper layer or between the upper layer and the middle layer, by developing the first latent images to silver, exposing the residual silver salt image in the lowest layer only by coloured light to which the other layers are not sensitive and colour developing the lowest layer, exposing the residual silver salt in the upper layer by blue 'light and colour developing, and then colouring the reversed image in the middle layer, and removing the positive and negative silver from all the layers. The middle layer may be colour developed without exposure by a colour developer containing ammonia, caustic alkali, alcohol or acetone, preferably out of contact with the air. Alkaline, alcoholic, or acetonic solutions of leuco vat dyes may be used. The residues of the latent images in the other two layers are destroyed by mild oxidizing agents such as a mixture of potassium ferricyanide and ammonia. The residual silver halide of the middle layer may be made developable by exposure from above or, both sides to ultra-violet light or soft X-rays and colour developed. A residual silver bromide image in the middle layer may be converted to silver iodide or a complex salt thereof, which is then coloured purple by a mordanting dye and the latter made insoluble. The material may comprise a blue-violet sensitive upper layer, a yellow and green sensitive middle layer, and a red or infra red sensitive lower layer, or a blue-violet sensitive upper layer, a middle red and orange or infra-red sensitive layer and a lower yellow and green sensitive layer, or a red sensitive upper layer, a yellow green sensitive middle layer, and a bluesensitive lower layer. 4: 4<1>-dichloro-2 : 2<1> : 8- triethylthiacarbocyanine chloride very strongly sensitizes to the extreme orange-red and the red but not to 'yellow and green. A yellow filter may be arranged between the bluesensitive and middle yellow-green or redorange sensitive layers or in the blue-sensitive layer itself. 'Green or red-orange filter may be arranged between the middle and lower layers. A colourless or yellow layer may be arranged between the middle and lower layers. The whole material may be coloured yellow. The yellow filter colouring matter must be resistant to the first developer and the colour sensitizers to a neutral black developer and a weakly alkaline colour developer. Latent images produced in the material after camera or printing exposure are developed with a neutral black developer such as ferrous oxalate, amidol or diamido-o-cresol or with organic developers containing sodium carbonate. Colour sensitivity, may be restored by treatment with alkali sulphite or bisulphite. All three layers may be saturated in a strong solution of the developing agent and development effected in solutions of sodium carbonate, ammonia, alkali bicarbonate, borax, trisodium phosphate or sodium aminoacetate. A concentrated developing solution may be allowed to diffuse into all, the, layers at a low temperature and development effected by warming. The residual silver halide is then used for reversal development. Specifications 376,746, 427,518, 427,520, 454,498, 454,499, 454,622, 498,663, 498,876, 500,720, and 500,826 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT500716X | 1936-05-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB500721A true GB500721A (en) | 1939-02-10 |
Family
ID=3675324
Family Applications (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34976/38A Expired GB500717A (en) | 1936-05-09 | 1937-05-10 | Improvements in colour photographic elements and processing thereof |
GB26471/38A Expired GB501002A (en) | 1936-05-09 | 1937-05-10 | Process of and materials for colour photography |
GB30655/38A Expired GB500716A (en) | 1936-05-09 | 1937-05-10 | Method of colour processing a colour photographic element |
GB26469/38A Expired GB501000A (en) | 1936-05-09 | 1937-05-10 | Process of colour photography |
GB33290/38A Expired GB500793A (en) | 1936-05-09 | 1937-05-10 | Process of and materials for colour photography |
GB26470/38A Expired GB501001A (en) | 1936-05-09 | 1937-05-10 | Process for colour photography |
GB36871/38A Expired GB500721A (en) | 1936-05-09 | 1937-05-10 | Improvements in and relating to three-colour photography |
GB13250/37A Expired GB500826A (en) | 1936-05-09 | 1937-05-10 | Process of and materials for colour photography |
Family Applications Before (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34976/38A Expired GB500717A (en) | 1936-05-09 | 1937-05-10 | Improvements in colour photographic elements and processing thereof |
GB26471/38A Expired GB501002A (en) | 1936-05-09 | 1937-05-10 | Process of and materials for colour photography |
GB30655/38A Expired GB500716A (en) | 1936-05-09 | 1937-05-10 | Method of colour processing a colour photographic element |
GB26469/38A Expired GB501000A (en) | 1936-05-09 | 1937-05-10 | Process of colour photography |
GB33290/38A Expired GB500793A (en) | 1936-05-09 | 1937-05-10 | Process of and materials for colour photography |
GB26470/38A Expired GB501001A (en) | 1936-05-09 | 1937-05-10 | Process for colour photography |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13250/37A Expired GB500826A (en) | 1936-05-09 | 1937-05-10 | Process of and materials for colour photography |
Country Status (1)
Country | Link |
---|---|
GB (8) | GB500717A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE971600C (en) * | 1944-04-15 | 1959-02-26 | Agfa Ag | Multilayer color photographic material without yellow filters |
-
1937
- 1937-05-10 GB GB34976/38A patent/GB500717A/en not_active Expired
- 1937-05-10 GB GB26471/38A patent/GB501002A/en not_active Expired
- 1937-05-10 GB GB30655/38A patent/GB500716A/en not_active Expired
- 1937-05-10 GB GB26469/38A patent/GB501000A/en not_active Expired
- 1937-05-10 GB GB33290/38A patent/GB500793A/en not_active Expired
- 1937-05-10 GB GB26470/38A patent/GB501001A/en not_active Expired
- 1937-05-10 GB GB36871/38A patent/GB500721A/en not_active Expired
- 1937-05-10 GB GB13250/37A patent/GB500826A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB500826A (en) | 1939-02-10 |
GB500793A (en) | 1939-02-10 |
GB500717A (en) | 1939-02-10 |
GB501001A (en) | 1939-02-10 |
GB500716A (en) | 1939-02-10 |
GB501002A (en) | 1939-02-10 |
GB501000A (en) | 1939-02-10 |
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