GB369616A - Improvements in or relating to colour photography - Google Patents
Improvements in or relating to colour photographyInfo
- Publication number
- GB369616A GB369616A GB28428/30A GB2842830A GB369616A GB 369616 A GB369616 A GB 369616A GB 28428/30 A GB28428/30 A GB 28428/30A GB 2842830 A GB2842830 A GB 2842830A GB 369616 A GB369616 A GB 369616A
- Authority
- GB
- United Kingdom
- Prior art keywords
- decoloured
- layer
- colour
- mordant
- converted
- 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
- 239000010410 layer Substances 0.000 abstract 7
- 239000002344 surface layer Substances 0.000 abstract 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 239000003086 colorant Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- AXDJCCTWPBKUKL-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydron;chloride Chemical compound Cl.C1=CC(=N)C(C)=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 AXDJCCTWPBKUKL-UHFFFAOYSA-N 0.000 abstract 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000004040 coloring Methods 0.000 abstract 1
- 238000004043 dyeing Methods 0.000 abstract 1
- 239000000839 emulsion Substances 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 abstract 1
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 229960003351 prussian blue Drugs 0.000 abstract 1
- 239000013225 prussian blue Substances 0.000 abstract 1
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 abstract 1
- 229960001755 resorcinol Drugs 0.000 abstract 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 abstract 1
- 150000003839 salts Chemical class 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
- G03C7/26—Silver halide emulsions for subtractive colour processes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
- Color Printing (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
369,616. Colour photography. GASPAR, B., 1, Eminescu, Temesvar, Roumania. Sept. 23, 1930, No. 28428. Convention date, Sept. 24, 1929. [Class 98 (ii).] In a process of colour photography, two or more layers of emulsion, sensitized to different colours are superposed on a support, exposed and developed and the images converted into a mordant and dyed with a single dye. The surface layer is then decoloured and recoloured with a different colour. This may be effected by redyeing the layer or by treating the product of decolouring with a reagent generating a different colour, e.g. fuchsine may be decoloured with nitrous acid and coupled with resorcin giving a yellow colour. The recolouration may also be carried out by acting on the mordant with a colour forming agent. For example, the silver image is converted into lead ferrocyanide and dyed with rhodamine S. The surface layer is then decoloured and the mordant converted into lead chromate. The whole is then transferred to a fresh carrier with the former underneath layer on top and this layer is decoloured and the mordant converted into Prussian Blue by means of a ferric salt. To enable the reactions to be controlled, the outside layers are made thin relatively to the inner layer, control marks produced by exposure to areas of the primary colours are produced on the edge of the film and stop baths are employed to cause the cessation of the action when it has extended to the desired depth. For example, if a dye is decoloured with a reducing agent, the action may be stopped by immersion in an oxidizing bath. Other methods of colouring the decoloured surface layer, e.g. by toning the silver image present or by using for decolouring agents producing a differential hardening and dyeing the unhardened parts of layer, may be used.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG0077548 | 1929-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB369616A true GB369616A (en) | 1932-03-23 |
Family
ID=7136469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28428/30A Expired GB369616A (en) | 1929-09-24 | 1930-09-23 | Improvements in or relating to colour photography |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1956122A (en) |
| FR (1) | FR702615A (en) |
| GB (1) | GB369616A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2612447A (en) * | 1947-01-13 | 1952-09-30 | Raibourn Paul | Photographic processing |
| US2661290A (en) * | 1948-09-23 | 1953-12-01 | Columbia Pictures Corp | Method of stripping multilayer negatives |
| EP0963571A1 (en) | 1997-02-24 | 1999-12-15 | OMD Devices LLC | Silver halide material for optical memory devices with luminescent reading and methods for the treatment thereof |
-
1929
- 1929-12-16 US US414563A patent/US1956122A/en not_active Expired - Lifetime
-
1930
- 1930-09-23 GB GB28428/30A patent/GB369616A/en not_active Expired
- 1930-09-24 FR FR702615D patent/FR702615A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR702615A (en) | 1931-04-13 |
| US1956122A (en) | 1934-04-24 |
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