GB1377407A - Process for the production of a stain resistant photographic silver halide emulsion - Google Patents

Process for the production of a stain resistant photographic silver halide emulsion

Info

Publication number
GB1377407A
GB1377407A GB4013672A GB4013672A GB1377407A GB 1377407 A GB1377407 A GB 1377407A GB 4013672 A GB4013672 A GB 4013672A GB 4013672 A GB4013672 A GB 4013672A GB 1377407 A GB1377407 A GB 1377407A
Authority
GB
United Kingdom
Prior art keywords
silver
silver halide
added
halide emulsion
chloride
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
GB4013672A
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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
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 Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of GB1377407A publication Critical patent/GB1377407A/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
    • G03C1/015—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
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/035—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein characterised by the crystal form or composition, e.g. mixed grain

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

1377407 Silver halide emulsion AGFAGEVAERT AG 30 Aug 1972 [3 Sept 1971] 40136/72 Heading G2C In the production of a silver halide emulsion by the precipitation of silver halide in the presence of a protective colloid, physical ripening, washing, and chemical ripening, silver chloride is added to or is formed in the emulsion between washing and chemical ripening, the silver chloride being added in the form of a preformed emulsion or formed in situ (alkali metal chloride and silver nitrate solutions being added). The amount of silver chloride added may be 2-10 mol % of the total silver halide. The added silver chloride may be produced using an excess of 1À2-2 times the stoichiometric amount. The original silver halide emulsion may contain silver chloride and/or bromide and 0-10% of silver iodide. The colloid may be gelatine, carboxymethylcellulose, polyvinyl alcohol, polyvinyl pyrrolidone, alginic acid, or a salt, ester or amide of alginic acid.
GB4013672A 1971-09-03 1972-08-30 Process for the production of a stain resistant photographic silver halide emulsion Expired GB1377407A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2144127A DE2144127C3 (en) 1971-09-03 1971-09-03 Process for preparing a silver halide photographic emulsion

Publications (1)

Publication Number Publication Date
GB1377407A true GB1377407A (en) 1974-12-18

Family

ID=5818554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4013672A Expired GB1377407A (en) 1971-09-03 1972-08-30 Process for the production of a stain resistant photographic silver halide emulsion

Country Status (5)

Country Link
US (1) US3804629A (en)
BE (1) BE787868A (en)
DE (1) DE2144127C3 (en)
FR (1) FR2151106B3 (en)
GB (1) GB1377407A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019917A2 (en) * 1979-06-01 1980-12-10 Konica Corporation Photographic silver halide emulsion comprising epitaxial composite silver halide crystals, silver iodobromide emulsion and process for preparing the same
GB2132372A (en) * 1982-12-20 1984-07-04 Eastman Kodak Co Controlled site epitaxial sensitization of limited iodine silver halide emulsions

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS511116A (en) * 1974-06-21 1976-01-07 Mitsubishi Paper Mills Ltd HAROGEN KAGINSHASHINNYUZAINO SEIZOHO
US4142900A (en) * 1977-02-18 1979-03-06 Eastman Kodak Company Converted-halide photographic emulsions and elements having composite silver halide crystals
US4094684A (en) * 1977-02-18 1978-06-13 Eastman Kodak Company Photographic emulsions and elements containing agel crystals forming epitaxial junctions with AgI crystals
US4435501A (en) 1981-11-12 1984-03-06 Eastman Kodak Company Controlled site epitaxial sensitization
CA1280312C (en) 1985-09-03 1991-02-19 Joe Edward Maskasky Emulsions and photographic elements containing ruffled silver halide grains
US4643966A (en) * 1985-09-03 1987-02-17 Eastman Kodak Company Emulsions and photographic elements containing ruffled silver halide grains
GB9603658D0 (en) * 1996-02-21 1996-04-17 Minnesota Mining & Mfg Photographic materials with improved image tone

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1214083B (en) * 1964-08-14 1966-04-07 Agfa Gevaert Ag Photographic light-sensitive material comprising at least one silver salt emulsion light-sensitive layer
US3600180A (en) * 1968-11-04 1971-08-17 Eastman Kodak Co Method of making a blend of fogged,direct positive silver halide emulsions of different grain sizes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019917A2 (en) * 1979-06-01 1980-12-10 Konica Corporation Photographic silver halide emulsion comprising epitaxial composite silver halide crystals, silver iodobromide emulsion and process for preparing the same
EP0019917A3 (en) * 1979-06-01 1981-05-27 Konishiroku Photo Industry Co. Ltd. Photographic silver halide emulsion comprising epitaxial composite silver halide crystals, silver iodobromide emulsion and process for preparing the same
GB2132372A (en) * 1982-12-20 1984-07-04 Eastman Kodak Co Controlled site epitaxial sensitization of limited iodine silver halide emulsions

Also Published As

Publication number Publication date
FR2151106B3 (en) 1975-10-03
BE787868A (en) 1973-02-23
DE2144127A1 (en) 1973-03-08
FR2151106A1 (en) 1973-04-13
US3804629A (en) 1974-04-16
DE2144127B2 (en) 1979-10-31
DE2144127C3 (en) 1983-12-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee