US2268630A - Color photography - Google Patents
Color photography Download PDFInfo
- Publication number
- US2268630A US2268630A US183588A US18358838A US2268630A US 2268630 A US2268630 A US 2268630A US 183588 A US183588 A US 183588A US 18358838 A US18358838 A US 18358838A US 2268630 A US2268630 A US 2268630A
- Authority
- US
- United States
- Prior art keywords
- color
- developer
- forming
- silver
- picture
- 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
- 229910052709 silver Inorganic materials 0.000 description 15
- 239000004332 silver Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 14
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 10
- 239000000975 dye Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 6
- -1 silver halide Chemical class 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 1
- 229930182558 Sterol Natural products 0.000 description 1
- DYRDKSSFIWVSNM-UHFFFAOYSA-N acetoacetanilide Chemical compound CC(=O)CC(=O)NC1=CC=CC=C1 DYRDKSSFIWVSNM-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000006149 azo coupling reaction Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 210000001072 colon Anatomy 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical compound O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000003702 sterols Nutrition 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
- 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
Definitions
- Our present invention relates to color photography and more particularly to a process of colorforming development.
- the invention is concerned with a process in which there is used a'multi-layer photographic material containing in the several layers, the suitable dyestuflf components for thcomponent pictures and the correct coloring is controlled first by simple or reversal development in the several layers to produce component silver imagesandthen, after fixing and converting the silver into a silver salt, further developing with the color forming developers.
- a'multi-layer photographic material containing in the several layers, the suitable dyestuflf components for thcomponent pictures and the correct coloring is controlled first by simple or reversal development in the several layers to produce component silver imagesandthen, after fixing and converting the silver into a silver salt, further developing with the color forming developers.
- the direct development of the color image in which causes a corresponding change in color tints during the subsequent color forming development.
- the developing solutions to be used may either contain different substances suitable for color I forming development or the speed of action of one and the same .or even diflerent developers may be varied by additions.
- the image by treatment with absorbent developer which-at the same time contains a dyestuii component which produces a color which 'is partly lacking or insufiicient in the finished color picture. Since in this case the action of the color forming developer is not limited to any particular layer, the method lends itself only to a comparatively small compensation of the color tint.
- dyestuff formers for the silver halide emulsion layers there may be used with advantage dyestufi components which are fast to diflusion with respect to the binding agent of the emulsion owing to the presence of certain radicals in their molecule.
- groups may be introduced into the color components which impart to the molecule of the color .lormer a substantive character.
- the dyestufi components may be made fast to diffusion by introducing into their molecule radicals of highly.
- Patent 2,179,228, in which the dyestufl picture is produced by azo-coupling.
- dyestud components are fast to diffusion which are substituted by radicals of comparatively high molecular weight (2,179,239).
- Example 1 A multi-layer film, in which the first silver halide emulsion is pan-chromatically the color sensitized and comprises a color component which yields on color forming development a blue image, and the second layer is sensitized for green and comprises a dyestufl component which yields a red image on color forming development and the third layer is not sensitized and comprises a dyestufi. component which on color forming development yields a yellow image, is ex-' posed and thereafter developed in normal man.-
- the present method has the advantage that any desired usual black-andwhite developer may be used as the first developer and in this manner an essentially higher sensitivity attained, since it is known that a color forming developer is less powerful in its developing effect than are the usual black-andwhite developers.
- Example 2 If a film treated, for example, in a manner analogous to that described in Example 1 shows an undesirable color strain produced may be by insufficiency of one of the component colors, then the defect in the film may be eliminated by a subsequent treatment.
- the silver produced simultaneously with the dyestufl formation is bleached out and a color developer which contains a dyestufi! component for the particular color shade lacking in the picture, is employed.
- a developer will be used which in addition to the color forming agent, contains a red dyestufif component, for instance grams per liter of l-phenyl-3-methylfi-pyrazolone.
- a process of producing photographic color pictures on multi-iayer photographic material comprising a plurality of silver halide emulsion layers containing dyestufi! components fast to diflusion, said dyestuff components being capable of forming a dye in the places of thesilver picture upon being contacted with -a color forming developer, which process comprisesexposing said material to light, developing the latent image thus formed with a black-andwhite developer, fixing thedeveloped picture, reconverting the formed silver into -a silver salt capable of being developed by a color-forming developer which would normally yield dyestui! images having undesired color strains, redeveloping s'aid silver salt by means of a color forming developer while compensating for such undesired color strains by using a developer having the property of shifting the color values to correct said color strains.
- a process of producing photographic color pictures on multi-layer photographic material 7 comprising a plurality of silver halide emulsion layers containing dyestufl components fast to diffusion, said dyestui! components being sired depression of the unduly predominant colon.
- this strain may be removed or profoundly modified by adding to the color developer 10 grams of aceto-acetic acid anilide per liter.
- Example 4. If it is known beforehand that the finished colored film for one reason or another will show acertain color strain, then it is possible to counteract this color strain by using as a developer a substance which in itself shifts the tint of the picture in a sense complementary to the undesired color strain which is If, for example, it is known that the film for some capable of forming a dye in the places of the silver picture upon being contacted with a color forming developer, which process comprisesexposing said material to light, developing the latent image thus formed witha black-and-white developer, fixing the developed picture, reconverting the formed silver 'into a silver salt capable of being developed, redeveloping said silver salt by means of a color forming developer containing a dyestuif component, capable of forming a dye with the oxidation product of the developer complementary to the color previously determined to unduly predominate in the final picture, in an amount sufllcient to eifect the de- 3.
- a process of producing photographic color pictures on a photographic material comprising.
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 |
---|---|---|---|
DEI0056935 | 1937-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2268630A true US2268630A (en) | 1942-01-06 |
Family
ID=7194471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US183588A Expired - Lifetime US2268630A (en) | 1937-01-21 | 1938-01-06 | Color photography |
Country Status (4)
Country | Link |
---|---|
US (1) | US2268630A (fr) |
BE (1) | BE425838A (fr) |
FR (1) | FR832245A (fr) |
GB (1) | GB511770A (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2568208A (en) * | 1947-02-17 | 1951-09-18 | Fraunhofer Hans Von | Color photography |
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 |
US2623822A (en) * | 1949-12-06 | 1952-12-30 | Gen Aniline & Film Corp | Method of obtaining multicolored photographic images of increased color density |
US2704710A (en) * | 1950-04-18 | 1955-03-22 | Gen Aniline & Film Corp | Precipitation of azo dyes in silver halide emulsions by means of guanidine and biguanide compounds containing long alkyl chains |
US2710801A (en) * | 1952-04-15 | 1955-06-14 | Eastman Kodak Co | Non-diffusing polymeric reducing agents for photographic color emulsions |
-
0
- BE BE425838D patent/BE425838A/xx unknown
-
1938
- 1938-01-06 US US183588A patent/US2268630A/en not_active Expired - Lifetime
- 1938-01-18 FR FR832245D patent/FR832245A/fr not_active Expired
- 1938-01-19 GB GB1792/38A patent/GB511770A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2568208A (en) * | 1947-02-17 | 1951-09-18 | Fraunhofer Hans Von | Color photography |
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 |
US2623822A (en) * | 1949-12-06 | 1952-12-30 | Gen Aniline & Film Corp | Method of obtaining multicolored photographic images of increased color density |
US2704710A (en) * | 1950-04-18 | 1955-03-22 | Gen Aniline & Film Corp | Precipitation of azo dyes in silver halide emulsions by means of guanidine and biguanide compounds containing long alkyl chains |
US2710801A (en) * | 1952-04-15 | 1955-06-14 | Eastman Kodak Co | Non-diffusing polymeric reducing agents for photographic color emulsions |
Also Published As
Publication number | Publication date |
---|---|
GB511770A (en) | 1939-08-24 |
BE425838A (fr) | |
FR832245A (fr) | 1938-09-23 |
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