GB517628A - Method of preparing silver halide geltine emulsions for the silver dyestuff bleach-out process - Google Patents
Method of preparing silver halide geltine emulsions for the silver dyestuff bleach-out processInfo
- Publication number
- GB517628A GB517628A GB22845/38A GB2284538A GB517628A GB 517628 A GB517628 A GB 517628A GB 22845/38 A GB22845/38 A GB 22845/38A GB 2284538 A GB2284538 A GB 2284538A GB 517628 A GB517628 A GB 517628A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silver halide
- gelatine
- emulsion
- silver
- per cent
- 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/025—Physical treatment of emulsions, e.g. by ultrasonics, refrigeration, pressure
-
- 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
- G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Pyridine Compounds (AREA)
Abstract
517,628. Colour photography. KODAK, Ltd. Aug. 2, 1938, No. 22845. Convention date, July 31, 1937. [Class 98 (ii)] A thin silver halide emulsion layer having a high silver halide content for the silver dyestuff bleach-out process is produced by centrifuging an emulsion containing at least 6 per cent., preferably at least 10 per cent. of gelatine, dispersing the silver halide grains thus removed to produce a coloured gelatine dispersion and coating on a support. In a modification the unwashed silver halide grains produced by centrifuging a gelatine-silver halide emulsion are dispersed to produce the coloured gelatine dispersion. In an example green-sensitized high contrast emulsion is centrifuged for ten minutes, 90 per cent. of the silver halide grains are recovered on the centrifuge walls ' and are dispersed in gelatine dyed with Algol Pink BBK. The dyed emulsion is coated on a transparent support. Dispersions of red- and bluesensitive emulsions may be similarly prepared and coated on glass, cellulosic material, or paper. Vat or azo dyes of colours complementary to the colour sensitivity may be used to colour the layers.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US517628XA | 1937-07-30 | 1937-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB517628A true GB517628A (en) | 1940-02-05 |
Family
ID=21973236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22845/38A Expired GB517628A (en) | 1937-07-30 | 1938-08-02 | Method of preparing silver halide geltine emulsions for the silver dyestuff bleach-out process |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE704741C (en) |
| FR (1) | FR841482A (en) |
| GB (1) | GB517628A (en) |
-
1938
- 1938-07-30 DE DEK151434A patent/DE704741C/en not_active Expired
- 1938-07-30 FR FR841482D patent/FR841482A/en not_active Expired
- 1938-08-02 GB GB22845/38A patent/GB517628A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE704741C (en) | 1941-04-05 |
| FR841482A (en) | 1939-05-22 |
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