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GB1016824A - Photographic silver halide emulsions of increased sensitivity - Google Patents

Photographic silver halide emulsions of increased sensitivity

Info

Publication number
GB1016824A
GB1016824A GB31253/62A GB3125362A GB1016824A GB 1016824 A GB1016824 A GB 1016824A GB 31253/62 A GB31253/62 A GB 31253/62A GB 3125362 A GB3125362 A GB 3125362A GB 1016824 A GB1016824 A GB 1016824A
Authority
GB
United Kingdom
Prior art keywords
silver halide
increased sensitivity
halide emulsions
photographic silver
dithia
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
GB31253/62A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak 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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1016824A publication Critical patent/GB1016824A/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
    • G03C1/42—Developers or their precursors
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,17 - di - (N - Ethylcarbamyl) - 6,12 - dithia-9 - oxa - heptadecane is prepared by reacting 6-bromocaproic acid and bis-(b -mercaptoethyl) ether in sodium alcoholate and acidifying the product to give 1,17-dicarboxy-6,12-dithia-9-oxa-heptadecane. This is reacted with ethylamine in the presence of oxalyl chloride to give the desired product.
GB31253/62A 1961-08-17 1962-08-15 Photographic silver halide emulsions of increased sensitivity Expired GB1016824A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US132011A US3192046A (en) 1961-08-17 1961-08-17 Photographic silver halide emulsions sensitized with thioether and developer combinations

Publications (1)

Publication Number Publication Date
GB1016824A true GB1016824A (en) 1966-01-12

Family

ID=22452022

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31253/62A Expired GB1016824A (en) 1961-08-17 1962-08-15 Photographic silver halide emulsions of increased sensitivity

Country Status (4)

Country Link
US (1) US3192046A (en)
BE (1) BE621460A (en)
DE (1) DE1155327B (en)
GB (1) GB1016824A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300307A (en) * 1963-01-18 1967-01-24 Eastman Kodak Co Photographic developer composition
US3243294A (en) * 1963-11-06 1966-03-29 Eastman Kodak Co Photographic direct-positive color process
US3453109A (en) * 1966-06-24 1969-07-01 Eastman Kodak Co Forming a relief by developing and hardening an exposed unhardened silver halide emulsion in the exposed areas with 3-pyrazolidones having hydroxymethyl substitution in the 4-position
US3531289A (en) * 1966-12-02 1970-09-29 Eastman Kodak Co Silver halide photographic emulsions improved by new precipitation methods
US3632341A (en) * 1970-03-13 1972-01-04 Itek Corp Photographic developer
JPS59188641A (en) 1983-04-11 1984-10-26 Fuji Photo Film Co Ltd Silver halide photographic emulsion
US5252449A (en) * 1992-09-25 1993-10-12 E. I. Du Pont De Nemours And Company Photographic silver halide emulsions with improved bright room tolerance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB845928A (en) * 1957-10-25 1960-08-24 Ilford Ltd Improvements in or relating to photographic emulsions
US3046129A (en) * 1958-12-12 1962-07-24 Eastman Kodak Co Sensitization of photographic silver halide emulsions containing colorforming compounds with polymeric thioethers

Also Published As

Publication number Publication date
DE1155327B (en) 1963-10-03
US3192046A (en) 1965-06-29
BE621460A (en)

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