GB1395923A – Process for the manufacture of a silver halide photographic emulsion
– Google Patents
GB1395923A – Process for the manufacture of a silver halide photographic emulsion
– Google Patents
Process for the manufacture of a silver halide photographic emulsion
Info
Publication number
GB1395923A
GB1395923A
GB2556072A
GB2556072A
GB1395923A
GB 1395923 A
GB1395923 A
GB 1395923A
GB 2556072 A
GB2556072 A
GB 2556072A
GB 2556072 A
GB2556072 A
GB 2556072A
GB 1395923 A
GB1395923 A
GB 1395923A
Authority
GB
United Kingdom
Prior art keywords
gelatine
emulsion
silver halide
acid
grains
Prior art date
1971-06-02
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
GB2556072A
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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.)
1971-06-02
Filing date
1972-05-31
Publication date
1975-05-29
1972-05-31
Application filed by Fuji Photo Film Co Ltd
filed
Critical
Fuji Photo Film Co Ltd
1975-05-29
Publication of GB1395923A
publication
Critical
patent/GB1395923A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
G03C1/08—Sensitivity-increasing substances
G03C1/09—Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising
Abstract
1395923 Preparing silver halide emulsions FUJI PHOTO FILM CO Ltd 31 May 1972 [2 June 1971] 25560/72 Heading G2C A method of preparing a silver halide emulsion for flash exposure comprises adding to the emulsion a rhodium compound before or during precipitation of the silver halide grains and an iridium compound before or during precipitation of the grains and/or during physical ripening of the emulsion. The grains are dispersed in an aqueous emulsion of a hydrophilic colloid which may also contain aqueous ammonia. The rhodium compound may be a simple salt such as di- or tri-halide e.g. chloride or bromide, or an octahedral complex salt such as an alkali metal or ammonium hexaholegenorhodate e.g. potassium hexachlororhodate, ammonium hexachlororhodate. The iridium salt may be a simple salt such as a tri- or tetra-halide e.g. Cl or Br, an octahedral complex acid such as hexahalogenoiridic (III) acid or hexahalogenoiridic (IV) acid or the alkali metal or ammonium salts thereof, e.g. potassium hexachloroiridate (IV). The hydrophilic colloid may be a natural organic colloid such as gelatine or a gelatine derivative e.g. phthalic gelatine, maleic gelatine, carboxymethyl gelatine or trimellitic gelatine or a synthetic organic colloid e.g. polyvinyl alcohol, carboxymethyl cellulose or a co-condensate of maleic anhydride, phthalic acid and a polyol.
GB2556072A
1971-06-02
1972-05-31
Process for the manufacture of a silver halide photographic emulsion
Expired
GB1395923A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
JP3838371
1971-06-02
Publications (1)
Publication Number
Publication Date
GB1395923A
true
GB1395923A
(en)
1975-05-29
Family
ID=12523738
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2556072A
Expired
GB1395923A
(en)
1971-06-02
1972-05-31
Process for the manufacture of a silver halide photographic emulsion
Country Status (2)
Country
Link
DE
(1)
DE2226877A1
(en)
GB
(1)
GB1395923A
(en)
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US5252451A
(en)
*
1993-01-12
1993-10-12
Eastman Kodak Company
Photographic emulsions containing internally and externally modified silver halide grains
US5256530A
(en)
*
1993-01-12
1993-10-26
Eastman Kodak Company
Photographic silver halide emulsion containing contrast improving grain surface modifiers
US5385817A
(en)
*
1993-01-12
1995-01-31
Eastman Kodak Company
Photographic emulsions containing internally and externally modified silver halide grains
US5597686A
(en)
*
1993-01-12
1997-01-28
Eastman Kodak Company
Photographic silver halide emulsion containing contrast improving dopants
Families Citing this family (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2296204A1
(en)
*
1974-12-27
1976-07-23
Kodak Pathe
Chemical sensitization of X-ray film – by incorporating iridium – or rhodium salt and a salt of a purine base in the silver halide emulsion
US4997751A
(en)
*
1989-05-12
1991-03-05
Eastman Kodak Company
Silver halide emulsions having improved low intensity reciprocity characteristics and processes of preparing them
DE4118542A1
(en)
*
1991-06-06
1992-12-10
Agfa Gevaert Ag
PHOTOGRAPHIC SILVER HALOGEN EMULSION
DE69103774T2
(en)
*
1991-10-30
1995-04-27
Eastman Kodak Co
Rhodium recovery.
JPH05307220A
(en)
*
1992-04-30
1993-11-19
Mitsubishi Paper Mills Ltd
Silver halide photographic sensitive material
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2717833A
(en)
*
1952-05-12
1955-09-13
Sperry Rand Corp
Direct positive emulsions
GB775197A
(en)
*
1954-10-08
1957-05-22
Ici Ltd
Colour photographic process
US3531289A
(en)
*
1966-12-02
1970-09-29
Eastman Kodak Co
Silver halide photographic emulsions improved by new precipitation methods
1972
1972-05-31
GB
GB2556072A
patent/GB1395923A/en
not_active
Expired
1972-06-02
DE
DE19722226877
patent/DE2226877A1/en
active
Granted
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US5252451A
(en)
*
1993-01-12
1993-10-12
Eastman Kodak Company
Photographic emulsions containing internally and externally modified silver halide grains
US5256530A
(en)
*
1993-01-12
1993-10-26
Eastman Kodak Company
Photographic silver halide emulsion containing contrast improving grain surface modifiers
US5385817A
(en)
*
1993-01-12
1995-01-31
Eastman Kodak Company
Photographic emulsions containing internally and externally modified silver halide grains
US5597686A
(en)
*
1993-01-12
1997-01-28
Eastman Kodak Company
Photographic silver halide emulsion containing contrast improving dopants
Also Published As
Publication number
Publication date
DE2226877C2
(en)
1987-01-22
DE2226877A1
(en)
1972-12-28
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(en)
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Photographic silver salt emulsion for the production of direct positive images
US2369449A
(en)
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(en)
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(en)
1973-02-14
Production of photographic silver images
Legal Events
Date
Code
Title
Description
1975-10-08
PS
Patent sealed
1992-07-01
PE20
Patent expired after termination of 20 years
