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
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB635841A (en) | Improvements in photographic silver halide emulsions | |
GB1244818A (en) | Process for production of a silver halide photographic emulsion | |
GB1025651A (en) | Preparation of photographic silver halide emulsions | |
GB1452302A (en) | Direct positive silver halide elements | |
US3703584A (en) | Process of sensitizing converted-type silver halide emulsions with noble-metal salts | |
GB819039A (en) | Preparation of photographic emulsions | |
ATE40887T1 (en) | PHOTOGRAPHIC MATERIALS CONTAINING CHALCOGENAZOLE, CHALCOGENAZOLINE AND THEIR SALTS. | |
GB1315755A (en) | Preparation of photographic silver halide materials | |
GB1458764A (en) | Photographic emulsions | |
GB701926A (en) | Preparation of photographic emulsions | |
US5275923A (en) | Method of photographic processing and fixer compositions therefor | |
GB1298254A (en) | Mixed silver halide photographic emulsions | |
GB1271025A (en) | Photographic hardening baths | |
GB1535042A (en) | Preparation of photographic silver halide emulsions | |
US2550617A (en) | Fine grain photographic developer containing morpholine | |
DE68915068T2 (en) | Stabilized photographic material. | |
JPS5225632A (en) | Processing agent for silver halide color photographic light sensitive material | |
GB1008694A (en) | Manufacture of silver halide emulsions | |
GB1305773A (en) | ||
US2131742A (en) | Photographic desensitizing | |
US2678883A (en) | Preparation of photographic emulsions | |
GB255846A (en) | A new or improved silver halide emulsion and a process for its manufacture | |
GB1350619A (en) | Silver halide photographic emulsions | |
SU542165A1 (en) | A method of manufacturing halogen-silver photographic emulsions | |
GB1166074A (en) | Photographic Silver Halide Emulsions |