GB1117743A - Improvements in photographic emulsions and their use - Google Patents

Improvements in photographic emulsions and their use

Info

Publication number
GB1117743A
GB1117743A GB43298/65A GB4329865A GB1117743A GB 1117743 A GB1117743 A GB 1117743A GB 43298/65 A GB43298/65 A GB 43298/65A GB 4329865 A GB4329865 A GB 4329865A GB 1117743 A GB1117743 A GB 1117743A
Authority
GB
United Kingdom
Prior art keywords
aminoselenophenol
amino
refluxing
photographic emulsions
zinc
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
GB43298/65A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1117743A publication Critical patent/GB1117743A/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
    • G03C1/492—Photosoluble emulsions

Abstract

2-Mercaptobenzoselenazole is made by heating o -aminoselenophenol with NaOH and carbon disulphide (Example 1). The zinc salt of o -aminoselenophenol is obtained by reducing 2:21-diaminodiphenyldi-selenide with zinc and HCl (Example 1). 4:5 - Diphenyl - 2 - mercaptoimidazole is made by refluxing benzoin and ammonium thiocyanate (Example 2). 4 - Phenyl- and 4 - (p - nitrophenyl) - 2 - mercaptoimidazoles are made by refluxing potassium thiocyanate with o -amino-acetophenone hydrochloride and o -amino-4-nitroacetophenone hydrochloride respectively (Examples 3 and 4).
GB43298/65A 1964-10-13 1965-10-12 Improvements in photographic emulsions and their use Expired GB1117743A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US403631A US3407068A (en) 1964-10-13 1964-10-13 Photosolubilization
US403660A US3368899A (en) 1964-10-13 1964-10-13 Emulsion layers and elements

Publications (1)

Publication Number Publication Date
GB1117743A true GB1117743A (en) 1968-06-26

Family

ID=27018353

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43298/65A Expired GB1117743A (en) 1964-10-13 1965-10-12 Improvements in photographic emulsions and their use

Country Status (5)

Country Link
US (2) US3368899A (en)
BE (1) BE670824A (en)
DE (1) DE1296514B (en)
FR (1) FR1463068A (en)
GB (1) GB1117743A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647439A (en) * 1968-10-01 1972-03-07 Eastman Kodak Co Photographic element, composition and process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR89467E (en) * 1961-12-08

Also Published As

Publication number Publication date
US3407068A (en) 1968-10-22
US3368899A (en) 1968-02-13
DE1296514B (en) 1969-05-29
BE670824A (en) 1966-04-12
FR1463068A (en) 1966-06-03

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