US2294731A - Color photography - Google Patents
Color photography Download PDFInfo
- Publication number
- US2294731A US2294731A US281652A US28165239A US2294731A US 2294731 A US2294731 A US 2294731A US 281652 A US281652 A US 281652A US 28165239 A US28165239 A US 28165239A US 2294731 A US2294731 A US 2294731A
- Authority
- US
- United States
- Prior art keywords
- picture
- dyestufi
- color
- layer
- dyestuff
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 description 11
- 239000000975 dye Substances 0.000 description 7
- 238000004040 coloring Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 4
- INCIMLINXXICKS-UHFFFAOYSA-M pyronin Y Chemical compound [Cl-].C1=CC(=[N+](C)C)C=C2OC3=CC(N(C)C)=CC=C3C=C21 INCIMLINXXICKS-UHFFFAOYSA-M 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical compound [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- -1 Benzo Fast Green Chemical compound 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JADVWWSKYZXRGX-UHFFFAOYSA-M thioflavine T Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C1=[N+](C)C2=CC=C(C)C=C2S1 JADVWWSKYZXRGX-UHFFFAOYSA-M 0.000 description 2
- UCTWMZQNUQWSLP-VIFPVBQESA-N (R)-adrenaline Chemical compound CNC[C@H](O)C1=CC=C(O)C(O)=C1 UCTWMZQNUQWSLP-VIFPVBQESA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- POJOORKDYOPQLS-UHFFFAOYSA-L barium(2+) 5-chloro-2-[(2-hydroxynaphthalen-1-yl)diazenyl]-4-methylbenzenesulfonate Chemical compound [Ba+2].C1=C(Cl)C(C)=CC(N=NC=2C3=CC=CC=C3C=CC=2O)=C1S([O-])(=O)=O.C1=C(Cl)C(C)=CC(N=NC=2C3=CC=CC=C3C=CC=2O)=C1S([O-])(=O)=O POJOORKDYOPQLS-UHFFFAOYSA-L 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 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
- G03C11/00—Auxiliary processes in photography
- G03C11/04—Retouching
-
- 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
- G03C11/00—Auxiliary processes in photography
- G03C11/18—Colouring
Definitions
- the substance which is to act on the dyestufi picture and has a reaction opposed to that of the dyestufi should be a dyestuff.
- the same result may be obtained when a slightly colored or even a colorless substance of corresponding chemical reaction is used 55 th hue or a photographic dyestuii picture con- In Germany June 29, 1938 (ores-2) so long, as it produces an effect on the color tint in the treated layer.
- a special application of the process is its use to vary in controllable manner the content of black in a dyestuff image.
- a threeiayer film produced by one of the known subtractive processes for example by the silver dyestufi bleaching out process, may carry on one side the blue-green layer and on the other the purple layer and the yellow layer. Should the picture thus obtained exhibit excessively brilliant coloring it may .be treated with a solution which, as described above. consists of a mixture of the dyestufis Thioflavine T, Pyronine G and Methylene Blue HGG. In general this solution is'so adjusted that a neutral grey tint is produced.
- the solution used for the further coloring must be so adjusted that it contains a smaller proportion of yellow so that as a final efiect there is produced a neutral grey.
- an original picture having an undesirable color strain may be corrected by a preponderance of a dyestufi in the after-coloring solution. For example if the picture is as a whole too greenish the content of the after-dyeing solution in Pyronine G will be increased so that in the finished color picture besides the desired darkening there will be a correction to pure grey.
- a process for strengthening the hue of dyestufi pictures in a multi-layer material in each layer of which a different dyestuff picture is located which comprises precipitating the dyestuffs of said pictures by treating said material with a solution of as many dyestufis as there are dyestuff pictures, each dyestufi having a color approximating that of a dyestuff picture but a pH on the side of the neutral point opposite to that of the dyestuff or said picture.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2294731X | 1938-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2294731A true US2294731A (en) | 1942-09-01 |
Family
ID=7993882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US281652A Expired - Lifetime US2294731A (en) | 1938-06-29 | 1939-06-28 | Color photography |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2294731A (fr) |
| FR (1) | FR856444A (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2592514A (en) * | 1947-05-07 | 1952-04-08 | Gen Aniline & Film Corp | Multilayer photographic color film in which at least one layer contains a mixture of cyan, magenta, and yellow dye image intermediates |
-
1939
- 1939-06-16 FR FR856444D patent/FR856444A/fr not_active Expired
- 1939-06-28 US US281652A patent/US2294731A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2592514A (en) * | 1947-05-07 | 1952-04-08 | Gen Aniline & Film Corp | Multilayer photographic color film in which at least one layer contains a mixture of cyan, magenta, and yellow dye image intermediates |
Also Published As
| Publication number | Publication date |
|---|---|
| FR856444A (fr) | 1940-06-13 |
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