US2280721A - Process of developing photographic pictures - Google Patents
Process of developing photographic pictures Download PDFInfo
- Publication number
- US2280721A US2280721A US304321A US30432139A US2280721A US 2280721 A US2280721 A US 2280721A US 304321 A US304321 A US 304321A US 30432139 A US30432139 A US 30432139A US 2280721 A US2280721 A US 2280721A
- Authority
- US
- United States
- Prior art keywords
- color
- development
- stopping
- developer
- forming
- 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 title description 6
- 150000003839 salts Chemical class 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 150000007513 acids Chemical class 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- 150000008043 acidic salts Chemical class 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- SKYBRLALUDNCSM-UHFFFAOYSA-N 1,1-dimethyl-2-phenylhydrazine Chemical compound CN(C)NC1=CC=CC=C1 SKYBRLALUDNCSM-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000001008 quinone-imine dye Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- -1 silver halide Chemical class 0.000 description 1
- 238000005406 washing 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/268—Processing baths not provided for elsewhere, e.g. pre-treatment, stop, intermediate or rinse baths
Definitions
- stopping baths were in general composed of dilute acids which neutralize the alkali of the developer and thereby interrupt the development of the silver halide.
- a further object of the invention consists in the provision of an improvement in the color-
- a further object of the invention is to provide a novel photographic stopping bath.
- the stopping baths according to the present invention therefore act with very high ef- 'ficiency and-the effect of stopping the developer is produced rapidly and with certainty. Furthermore, the above described damaging of the dyes is avoided and the color-forming development compound is transformed into an easily soluble form as a mixed salt and can easily be washed out of the layer.
- the stopping baths may be employed in the color-forming developmentof layers containing Example A multi-layer photographic element containing dyestufl components fast to diffusion is developed by color-forming development. At the end of the alkali must be DDed but the -f ming thecolorr-forming development it is immediately per cent of primary sodium citrate. After being treated in the stopping bath for 1 minute the iiim is watered, bleached and fixed.
- the step which comprises immersing the color photographic element immediately after the development thereof in a stepping bath containing a bufler solution 0! an acidic salt of a polybasic organic acid the pH-value of a solution of said salt being from 3 to 5.
- step 3 which comprises immersing the color photographic element immediately after the development thereof in a solution containing aboutlO. per cent of primary sodium citrate.
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 |
|---|---|---|---|
| DEI0062964 | 1938-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2280721A true US2280721A (en) | 1942-04-21 |
Family
ID=7195795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US304321A Expired - Lifetime US2280721A (en) | 1938-11-24 | 1939-11-14 | Process of developing photographic pictures |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2280721A (en)) |
| BE (1) | BE437121A (en)) |
| CH (1) | CH217512A (en)) |
| FR (1) | FR873337A (en)) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2515121A (en) * | 1945-11-08 | 1950-07-11 | Gen Aniline & Film Corp | Process for preventing stains in photographic color material by treatment with basic acids immediately prior to drying |
| US3284199A (en) * | 1963-05-02 | 1966-11-08 | Du Pont | Buffered stop bath for interrupted photographic development |
-
0
- BE BE437121D patent/BE437121A/xx unknown
-
1939
- 1939-11-14 US US304321A patent/US2280721A/en not_active Expired - Lifetime
- 1939-11-22 CH CH217512D patent/CH217512A/de unknown
-
1941
- 1941-06-25 FR FR873337D patent/FR873337A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2515121A (en) * | 1945-11-08 | 1950-07-11 | Gen Aniline & Film Corp | Process for preventing stains in photographic color material by treatment with basic acids immediately prior to drying |
| US3284199A (en) * | 1963-05-02 | 1966-11-08 | Du Pont | Buffered stop bath for interrupted photographic development |
Also Published As
| Publication number | Publication date |
|---|---|
| FR873337A (fr) | 1942-07-06 |
| CH217512A (de) | 1941-10-31 |
| BE437121A (en)) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3520689A (en) | Color developing process utilizing pyridinium salts | |
| US2350380A (en) | Photography | |
| US2525503A (en) | Production of phenazonium dyestuff images | |
| US2182814A (en) | Photographic film | |
| US2214446A (en) | Photographic development of silver halide layers | |
| US2364675A (en) | Color forming compounds containing sulphonamide groups | |
| US2322001A (en) | Method of producing dye images | |
| US2515121A (en) | Process for preventing stains in photographic color material by treatment with basic acids immediately prior to drying | |
| US2280721A (en) | Process of developing photographic pictures | |
| US2186717A (en) | Production of colored photographic pictures | |
| US2669517A (en) | Furoquinoxalines and thienoquinoxalines as catalysts in dye bleach baths for color photography | |
| US2742832A (en) | Controlling grain and contrast in color photography | |
| US2196734A (en) | Colored photographic image from hydrazine compounds | |
| US4153459A (en) | Hybrid color photographic elements and processes for developing same | |
| US2657139A (en) | Process of removing color developer stain in azine dye images | |
| US1963197A (en) | Color photography and cinematography | |
| US2100594A (en) | Color photography | |
| US2327822A (en) | Reversal duplicating process | |
| US2179238A (en) | Manufacture of polychrome pictures | |
| US3495981A (en) | Color developing process | |
| US2356475A (en) | Phenolic and naphtholic couplers containing sulphonamide groups | |
| US3894875A (en) | Silver halide emulsions containing yellow dye-forming couplers exhibiting very low pH sensitivity | |
| US2108243A (en) | Photographic developer | |
| US2186719A (en) | Photographic silver halide emulsions | |
| US2210905A (en) | Production of photographic multicolor pictures |