GB861985A - Improvements in or relating to the preparation of photographic emulsions - Google Patents

Improvements in or relating to the preparation of photographic emulsions

Info

Publication number
GB861985A
GB861985A GB3652959A GB3652959A GB861985A GB 861985 A GB861985 A GB 861985A GB 3652959 A GB3652959 A GB 3652959A GB 3652959 A GB3652959 A GB 3652959A GB 861985 A GB861985 A GB 861985A
Authority
GB
United Kingdom
Prior art keywords
parent specification
silver halide
oct
emulsions
organic liquid
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
Application number
GB3652959A
Inventor
Alfons Jozef Pauw
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Publication of GB861985A publication Critical patent/GB861985A/en
Expired legal-status Critical Current

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
    • G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
    • 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

Abstract

861,985. Photographic emulsions. GEVAERT PHOTO-PRODUCTEN N.V. Oct. 10, 1957 [Oct. 10, 1956], No. 36529/59. Divided out of 861,984. Addition to 819,039. Class 98(2) A photographic gelatino silver halide emulsion is prepared by forming the silver halide in an aqueous medium in the presence of 2 to 25 parts by weight of gelatin per 100 parts of silver nitrate, the gelatin not exceeding 3 per cent by weight of the water present,. according to the parent Specification, adding sodium cellulose sulphate and then proceeding again according to the parent Specification by pouring the dispersion into an organic liquid miscible with water, washing the precipitate so obtained, and redispersing it in the desired amount of binder. The organic liquid may be methyl acetate, ethyl acetate, methanol, ethanol or mixtures of these. The emulsions may be sensitized with sulphur compounds or with compounds of heavy metals as described in the parent Specification; The examples are similar to those given in the parent Specification, except that sodium cellulose sulphate is added to the silver halide suspension before precipitation with acetone. Specification 789,823 also is referred to.
GB3652959A 1956-06-19 1956-10-10 Improvements in or relating to the preparation of photographic emulsions Expired GB861985A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1891456A GB819039A (en) 1956-06-19 1956-06-19 Preparation of photographic emulsions
GB3084756A GB861984A (en) 1956-06-19 1956-10-10 Preparation of photographic emulsions

Publications (1)

Publication Number Publication Date
GB861985A true GB861985A (en) 1961-03-01

Family

ID=26253685

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1891456A Expired GB819039A (en) 1956-06-19 1956-06-19 Preparation of photographic emulsions
GB3652959A Expired GB861985A (en) 1956-06-19 1956-10-10 Improvements in or relating to the preparation of photographic emulsions
GB3084756A Expired GB861984A (en) 1956-06-19 1956-10-10 Preparation of photographic emulsions

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1891456A Expired GB819039A (en) 1956-06-19 1956-06-19 Preparation of photographic emulsions

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3084756A Expired GB861984A (en) 1956-06-19 1956-10-10 Preparation of photographic emulsions

Country Status (4)

Country Link
BE (2) BE561484A (en)
DE (2) DE1049229B (en)
FR (1) FR1177365A (en)
GB (3) GB819039A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242051A (en) * 1958-12-22 1966-03-22 Ncr Co Coating by phase separation
BE592432A (en) * 1959-07-07
BE604859A (en) * 1960-06-10
US3186846A (en) * 1960-06-10 1965-06-01 Polaroid Corp Process for producing silver halide emulsions containing gelatin derivatives
DE1134885B (en) * 1960-09-30 1962-08-16 Adox Fotowerke Dr C Schleussne Process for the preparation of photographic silver halide emulsions by flocculation
BE613181A (en) * 1961-01-27
BE603491A (en) * 1961-05-08
US3271158A (en) * 1963-08-09 1966-09-06 Eastman Kodak Co Photographic silver halide emulsions having high wet density retention
US3411911A (en) * 1965-05-10 1968-11-19 Eastman Kodak Co Novel photographic materials containing water insoluble interpolymers
EP0514675B1 (en) 1991-04-22 1999-12-08 Fuji Photo Film Co., Ltd. Silver halide photographic materials and method for processing the same
EP0563708B1 (en) 1992-03-19 2000-06-21 Fuji Photo Film Co., Ltd. Process for preparing a silver halide photographic emulsion
DE69516054T2 (en) 1994-07-18 2000-10-26 Konishiroku Photo Ind Silver halide photographic element and its processing method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565418A (en) * 1947-08-13 1951-08-21 Eastman Kodak Co Method of preparing photographic silver halide emulsions

Also Published As

Publication number Publication date
BE561484A (en)
GB861984A (en) 1961-03-01
GB819039A (en) 1959-08-26
FR1177365A (en) 1959-04-23
BE558500A (en)
DE1049229B (en) 1959-01-22
DE1053308B (en) 1959-03-19

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