GB1147697A - A process for increasing the sensitivity of photographic silver halide-gelatine emulsions - Google Patents

A process for increasing the sensitivity of photographic silver halide-gelatine emulsions

Info

Publication number
GB1147697A
GB1147697A GB5613566A GB5613566A GB1147697A GB 1147697 A GB1147697 A GB 1147697A GB 5613566 A GB5613566 A GB 5613566A GB 5613566 A GB5613566 A GB 5613566A GB 1147697 A GB1147697 A GB 1147697A
Authority
GB
United Kingdom
Prior art keywords
silver halide
alkyl
sensitivity
increasing
hydrogen
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
GB5613566A
Inventor
Lothar Bulling
Jurgen Faust
Mechthild Fischer Siegf Gahler
Joachim Jentzsch
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.)
Filmfabrik Wolfen VEB
Original Assignee
Filmfabrik Wolfen VEB
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 Filmfabrik Wolfen VEB filed Critical Filmfabrik Wolfen VEB
Priority to GB5613566A priority Critical patent/GB1147697A/en
Publication of GB1147697A publication Critical patent/GB1147697A/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
    • G03C1/06—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

1,147,697. Photographic silver halide emulsions. FILMFABRIK WOLFEN, VEB. Dec.15, 1966, No.56135/66. Heading G2C. Photographic gelatino silver halide emulsions are sensitized by adding simultaneously auric trichloride and a compound of one of the formulae:- where X is -S- or -CH(R 3 )-, Y is -C(R 6 )(R 7 )- or -C(CH 2 ) n in which n is 2 to 7, R 1 is hydrogen or alkyl, R 2 and R 3 are each hydrogen, alkyl, -NH 2 or -CONH 2 , R 4 and R 5 are each hydrogen, alkyl, -NH 2 or -CH 2 R 8 , R 6 and R 7 are each alkyl and R 8 is halogen, -NH 2 , -OH, -SH, -NHR, -NR 2 , -OR or -SR in which R is alkyl. The silver halide is preferably silver chloride or silver bromochloride having at least 60 mol. per cent of silver chloride. A specified compound of the above formulae is
GB5613566A 1966-12-15 1966-12-15 A process for increasing the sensitivity of photographic silver halide-gelatine emulsions Expired GB1147697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5613566A GB1147697A (en) 1966-12-15 1966-12-15 A process for increasing the sensitivity of photographic silver halide-gelatine emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5613566A GB1147697A (en) 1966-12-15 1966-12-15 A process for increasing the sensitivity of photographic silver halide-gelatine emulsions

Publications (1)

Publication Number Publication Date
GB1147697A true GB1147697A (en) 1969-04-02

Family

ID=10475821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5613566A Expired GB1147697A (en) 1966-12-15 1966-12-15 A process for increasing the sensitivity of photographic silver halide-gelatine emulsions

Country Status (1)

Country Link
GB (1) GB1147697A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5677119A (en) * 1996-10-29 1997-10-14 Eastman Kodak Company Silver halide photographic elements containing dithiolone 1 oxide compounds
US5716773A (en) * 1995-06-23 1998-02-10 Minnesota Mining And Manufacturing Company Alteration of image tone in black and white photographic materials
US5914226A (en) * 1997-09-11 1999-06-22 Eastman Kodak Company Silver halide emulsions with improved heat stability

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5716773A (en) * 1995-06-23 1998-02-10 Minnesota Mining And Manufacturing Company Alteration of image tone in black and white photographic materials
US5677119A (en) * 1996-10-29 1997-10-14 Eastman Kodak Company Silver halide photographic elements containing dithiolone 1 oxide compounds
US5914226A (en) * 1997-09-11 1999-06-22 Eastman Kodak Company Silver halide emulsions with improved heat stability

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