GB1025651A - Preparation of photographic silver halide emulsions - Google Patents
Preparation of photographic silver halide emulsionsInfo
- Publication number
- GB1025651A GB1025651A GB524/62A GB52462A GB1025651A GB 1025651 A GB1025651 A GB 1025651A GB 524/62 A GB524/62 A GB 524/62A GB 52462 A GB52462 A GB 52462A GB 1025651 A GB1025651 A GB 1025651A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- aqueous medium
- water
- added
- silver halide
- 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 5
- 239000004332 silver Substances 0.000 title abstract 5
- -1 silver halide Chemical class 0.000 title abstract 5
- 239000012736 aqueous medium Substances 0.000 abstract 6
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 abstract 6
- 239000000243 solution Substances 0.000 abstract 6
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 abstract 2
- 150000004820 halides Chemical class 0.000 abstract 2
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- 229910001961 silver nitrate Inorganic materials 0.000 abstract 2
- 239000001828 Gelatine Substances 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 229920000159 gelatin Polymers 0.000 abstract 1
- 235000019322 gelatine Nutrition 0.000 abstract 1
- 229910052736 halogen Inorganic materials 0.000 abstract 1
- 150000002367 halogens Chemical class 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 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 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- NBOMNTLFRHMDEZ-UHFFFAOYSA-N thiosalicylic acid Chemical compound OC(=O)C1=CC=CC=C1S NBOMNTLFRHMDEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229940103494 thiosalicylic acid Drugs 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
- G03C1/49—Print-out and photodevelopable emulsions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
1,025,651. Photographic silver halide emulsions. KODAK Ltd. Jan. 7,1963 [Jan. 5,1962], No. 524/62. Heading G2C. In a method of making a photographic silver halide emulsion wherein an aqueous solution of a silver salt and an aqueous halide solution are simultaneously added to an aqueous medium which contains, or has added to it during the above addition, a water-soluble thiocyanate, the concentrations of the water-soluble salts, their times of addition and the temperature of the aqueous medium are controlled so that a coarse grained emulsion having a mean grain projective area between 0. 6 and 2. 5 Á<SP>2</SP> is produced. The time of addition may be from 20-60 mins., and the concentration of the thiocyanate in the aqueous medium may be from 0. 75-7. 5 mole % of the total silver halide formed, or, if added with the halide solution, up to 20 mole % of the total silver halide formed. The aqueous medium is preferably maintained at 65-85C. In the examples, a solution of 39g. of silver nitrate in 200 ml. of water and a solution of 28. 6 g (or 29.1 g) of potassium bromide in 200 ml. of water are simultaneously added to 113 (or 115) ml of water containing gelatine, sulphuric acid and a small amount of KBr or NaCI at 72C. over a period of 40 minutes. 3g. of KCNS are present in the aqueous medium or 6 g. in the KBr solution. A water-soluble lead salt also may be added to the aqueous medium, for example by inclusion in the silver nitrate solution. A halogen acceptor such as thiosalicylic acid may be added to the emulsions after the precipitation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB524/62A GB1025651A (en) | 1962-01-05 | 1962-01-05 | Preparation of photographic silver halide emulsions |
| US221428A US3260605A (en) | 1962-01-05 | 1962-09-05 | Method for preparing light-sensitive silver halide emulsions suitable for print-out recording materials |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB524/62A GB1025651A (en) | 1962-01-05 | 1962-01-05 | Preparation of photographic silver halide emulsions |
| US221428A US3260605A (en) | 1962-01-05 | 1962-09-05 | Method for preparing light-sensitive silver halide emulsions suitable for print-out recording materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1025651A true GB1025651A (en) | 1966-04-14 |
Family
ID=26235991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB524/62A Expired GB1025651A (en) | 1962-01-05 | 1962-01-05 | Preparation of photographic silver halide emulsions |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3260605A (en) |
| GB (1) | GB1025651A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332887A (en) * | 1980-10-06 | 1982-06-01 | Polaroid Corporation | Method for preparing photosensitive silver halide emulsions |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3418125A (en) * | 1964-08-20 | 1968-12-24 | Eastman Kodak Co | Process for preparing direct-positive images with photodevelopable directprint silver halide compositions |
| GB1160955A (en) * | 1965-10-11 | 1969-08-13 | Agfa Gevaert Nv | New Light-Developable Photographic Material and Recording Process |
| US3507657A (en) * | 1965-11-10 | 1970-04-21 | Eastman Kodak Co | Light-developable direct-print silver halide emulsions |
| US3320069A (en) * | 1966-03-18 | 1967-05-16 | Eastman Kodak Co | Sulfur group sensitized emulsions |
| US3519427A (en) * | 1967-03-10 | 1970-07-07 | Eastman Kodak Co | Light-sensitive silver-halide emulsions suitable for maximum-resolution materials |
| US3725073A (en) * | 1967-05-25 | 1973-04-03 | Xerox Corp | Light developable,direct writing,silver halide emulsions containing gold,iodine,lead and copper |
| BE754323A (en) * | 1969-08-04 | 1971-01-18 | Fuji Photo Film Co Ltd | PROCESS FOR THE MANUFACTURE OF SENSITIVE ELECTROPHOTOGRAPHIC EQUIPMENT |
| US7288279B2 (en) * | 2001-12-21 | 2007-10-30 | Michael Foods Of Delaware, Inc. | Formulated fried egg product |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2401051A (en) * | 1939-09-26 | 1946-05-28 | Photo Positive Corp | Photographic emulsions and methods |
| BE471336A (en) * | 1946-04-13 | |||
| BE484329A (en) * | 1947-11-19 | |||
| US2960405A (en) * | 1956-11-21 | 1960-11-15 | Gen Aniline & Film Corp | Peptizing silver-halides with modified casein |
| US3033682A (en) * | 1959-05-22 | 1962-05-08 | Du Pont | Radiation-sensitive emulsions, elements, and processes for making same |
-
1962
- 1962-01-05 GB GB524/62A patent/GB1025651A/en not_active Expired
- 1962-09-05 US US221428A patent/US3260605A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332887A (en) * | 1980-10-06 | 1982-06-01 | Polaroid Corporation | Method for preparing photosensitive silver halide emulsions |
Also Published As
| Publication number | Publication date |
|---|---|
| US3260605A (en) | 1966-07-12 |
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