GB379820A - Process for the simultaneous development to different gradations of several silver halide emulsion layers applied on different supports - Google Patents
Process for the simultaneous development to different gradations of several silver halide emulsion layers applied on different supportsInfo
- Publication number
- GB379820A GB379820A GB20834/31A GB2083431A GB379820A GB 379820 A GB379820 A GB 379820A GB 20834/31 A GB20834/31 A GB 20834/31A GB 2083431 A GB2083431 A GB 2083431A GB 379820 A GB379820 A GB 379820A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gradation
- different
- layers
- bath
- developing
- 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
Abstract
379,820. Developing sound and picture records. GROVES, W. W., 30, Southampton Buildings, London.-(I. G. Farbenindustrie Akt.-Ges.; Frankfort-on- Main, Germany.) July 21, 1931, No. 20834. [Class 40 (ii).] In a process of developing photographic layers, e.g. sound and picture records on separate supports, to different degrees of gradation, the layers requiring to be developed to the steeper gradation, e.g. the picture records, are pretreated in a bath which in conjunction with the developer renders the gradation steeper, e.g. a bath of alkali such as potassium carbonate to which potassium bromide may be added, or of a hardening agent such as formaldehyde, and the layers are then developed simultaneously in a developing bath suited to the layers in which flat gradation is required, e.g. the sound record. Specifications 176,357, [Class 98 (ii), Photographic processes &c.], and 344,365 are referred to.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI36633D DE533676C (en) | 1928-12-31 | 1929-01-01 | Process for the joint development of several halogen silver emulsion layers on different carriers with different steepnesses |
| GB20834/31A GB379820A (en) | 1928-12-31 | 1931-07-21 | Process for the simultaneous development to different gradations of several silver halide emulsion layers applied on different supports |
| US561992A US1956230A (en) | 1928-12-31 | 1931-09-09 | Process for obtaining different gradations in developing silver halide emulsion layers |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI0036633 | 1928-12-31 | ||
| GB20834/31A GB379820A (en) | 1928-12-31 | 1931-07-21 | Process for the simultaneous development to different gradations of several silver halide emulsion layers applied on different supports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB379820A true GB379820A (en) | 1932-09-08 |
Family
ID=25981550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20834/31A Expired GB379820A (en) | 1928-12-31 | 1931-07-21 | Process for the simultaneous development to different gradations of several silver halide emulsion layers applied on different supports |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1956230A (en) |
| GB (1) | GB379820A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2456955A (en) * | 1944-06-02 | 1948-12-21 | Eastman Kodak Co | Photographic processes and lightsensitive elements therefor |
| US2698245A (en) * | 1946-04-13 | 1954-12-28 | Polaroid Corp | Photographic product and process for making a positive transfer image |
| US2563342A (en) * | 1947-01-28 | 1951-08-07 | Polaroid Corp | Photographic product and process |
| FR960188A (en) * | 1947-01-28 | 1950-04-14 | ||
| US2584030A (en) * | 1947-02-07 | 1952-01-29 | Polaroid Corp | Light sensitive silver halide photographic product for image transfer and process utilizing the same |
| US2698238A (en) * | 1947-02-08 | 1954-12-28 | Polaroid Corp | Photographic product and process |
| US2644756A (en) * | 1947-02-08 | 1953-07-07 | Polaroid Corp | Photographic process for forming a positive transfer image |
| FR960844A (en) * | 1947-02-19 | 1950-04-26 | ||
| US2661292A (en) * | 1947-02-19 | 1953-12-01 | Polaroid Corp | Product for dispensing a liquidcoated sheet |
| US2653527A (en) * | 1947-02-19 | 1953-09-29 | Polaroid Corp | Process for treating photosensitive materials by spreading thereon a layer of processing liquid and apparatus for performing said process |
| US2647049A (en) * | 1947-02-25 | 1953-07-28 | Polaroid Corp | Photographic element for color photography and a process of producing multicolor pictures |
-
1931
- 1931-07-21 GB GB20834/31A patent/GB379820A/en not_active Expired
- 1931-09-09 US US561992A patent/US1956230A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1956230A (en) | 1934-04-24 |
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