GB884840A - The production of photographic silver halide emulsions - Google Patents
The production of photographic silver halide emulsionsInfo
- Publication number
- GB884840A GB884840A GB3515259A GB3515259A GB884840A GB 884840 A GB884840 A GB 884840A GB 3515259 A GB3515259 A GB 3515259A GB 3515259 A GB3515259 A GB 3515259A GB 884840 A GB884840 A GB 884840A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silver halide
- added
- dispersion
- emulsions
- polystyrene
- 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
- 239000000839 emulsion Substances 0.000 title abstract 5
- 229910052709 silver Inorganic materials 0.000 title abstract 4
- 239000004332 silver Substances 0.000 title abstract 4
- -1 silver halide Chemical class 0.000 title abstract 4
- 239000004793 Polystyrene Substances 0.000 abstract 5
- 229920002223 polystyrene Polymers 0.000 abstract 5
- 150000001875 compounds Chemical class 0.000 abstract 4
- 239000006185 dispersion Substances 0.000 abstract 4
- 229920000159 gelatin Polymers 0.000 abstract 3
- 235000019322 gelatine Nutrition 0.000 abstract 3
- 239000001828 Gelatine Substances 0.000 abstract 2
- 239000000084 colloidal system Substances 0.000 abstract 2
- 238000001556 precipitation Methods 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- 241001479434 Agfa Species 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 108010010803 Gelatin Proteins 0.000 abstract 1
- 239000002671 adjuvant Substances 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 150000003842 bromide salts Chemical class 0.000 abstract 1
- 229910052793 cadmium Inorganic materials 0.000 abstract 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract 1
- 150000003841 chloride salts Chemical class 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000016615 flocculation Effects 0.000 abstract 1
- 238000005189 flocculation Methods 0.000 abstract 1
- 239000008273 gelatin Substances 0.000 abstract 1
- 235000011852 gelatine desserts Nutrition 0.000 abstract 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/015—Apparatus or processes for the preparation of emulsions
-
- 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
- G03C7/388—Processes for the incorporation in the emulsion of substances liberating photographically active agents or colour-coupling substances; Solvents therefor
- G03C7/3882—Processes for the incorporation in the emulsion of substances liberating photographically active agents or colour-coupling substances; Solvents therefor characterised by the use of a specific polymer or latex
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
884,840. Photographic silver halide emulsions. AGFA A.G. Oct. 16, 1959 [Oct. 16, 1958], No. 35152/59. Class 98(2). Photographic emulsions are prepared by precipitating an aqueous gelatine silver halide dispersion by means of a water-soluble polystyrene sulphonic acid or salt thereof at a pH of 6 or less, separating the coagulum and redispersing it in an aqueous liquid. The polystyrene compound may first be added to the silver halide dispersion, or included in one of the solutions from which the dispersion is formed, and then the pH adjusted to 6 or below. Alternatively, the pH of the dispersion may be adjusted before the polystyrene compound is added. The flocculation is assisted by the presence of heavy metal salts such as the chlorides or bromides of cadmium or copper. The redispersion in water may be effected by adjusting the pH to between 6 and 10 and more gelatine or other colloid can be added to the resulting emulsion. The quantity of polystyrene compound used may be more than is necessary to effect precipitation so that it replaces some of the gelatin as the colloid binder. The usual adjuvants including colour couplers may be added to the emulsions before coating; or the colour coupler may be incorporated before precipitation with the polystyrene compound. Specifications 648,472 and 651,318 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA30548A DE1085422B (en) | 1958-10-16 | 1958-10-16 | Process for the preparation of photographic silver halide emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB884840A true GB884840A (en) | 1961-12-20 |
Family
ID=6927257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3515259A Expired GB884840A (en) | 1958-10-16 | 1959-10-16 | The production of photographic silver halide emulsions |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE583637A (en) |
| CH (1) | CH386838A (en) |
| DE (1) | DE1085422B (en) |
| FR (1) | FR1240772A (en) |
| GB (1) | GB884840A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3341333A (en) * | 1963-10-18 | 1967-09-12 | Gen Aniline & Film Corp | Process for preparing photographic emulsions |
| US5977190A (en) * | 1998-01-14 | 1999-11-02 | Eastman Kodak Company | Process for deionizing and concentrating emulsions |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB967624A (en) * | 1960-09-21 | 1964-08-26 | Gavaert Photo Producten N V | Improvements in or relating to the preparation of photographic silver halide emulsions |
| GB1414783A (en) * | 1972-08-03 | 1975-11-19 | Agfa Gevaert | Preparation of silver halide emulsions |
-
0
- BE BE583637D patent/BE583637A/xx unknown
-
1958
- 1958-10-16 DE DEA30548A patent/DE1085422B/en active Pending
-
1959
- 1959-10-07 CH CH7915459A patent/CH386838A/en unknown
- 1959-10-15 FR FR807527A patent/FR1240772A/en not_active Expired
- 1959-10-16 GB GB3515259A patent/GB884840A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3341333A (en) * | 1963-10-18 | 1967-09-12 | Gen Aniline & Film Corp | Process for preparing photographic emulsions |
| US5977190A (en) * | 1998-01-14 | 1999-11-02 | Eastman Kodak Company | Process for deionizing and concentrating emulsions |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1085422B (en) | 1960-07-14 |
| FR1240772A (en) | 1960-09-09 |
| CH386838A (en) | 1965-01-15 |
| BE583637A (en) |
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