GB518478A - Improved sensitized photographic emulsions - Google Patents

Improved sensitized photographic emulsions

Info

Publication number
GB518478A
GB518478A GB2182838A GB2182838A GB518478A GB 518478 A GB518478 A GB 518478A GB 2182838 A GB2182838 A GB 2182838A GB 2182838 A GB2182838 A GB 2182838A GB 518478 A GB518478 A GB 518478A
Authority
GB
United Kingdom
Prior art keywords
dye bases
prepared
photographic emulsions
alpha
sensitized photographic
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
GB2182838A
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.)
Kodak Ltd
Original Assignee
Kodak 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.)
Filing date
Publication date
Application filed by Kodak Ltd filed Critical Kodak Ltd
Priority to GB2182838A priority Critical patent/GB518478A/en
Publication of GB518478A publication Critical patent/GB518478A/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
    • G03C1/28—Sensitivity-increasing substances together with supersensitising substances
    • G03C1/29—Sensitivity-increasing substances together with supersensitising substances the supersensitising mixture being solely composed of dyes ; Combination of dyes, even if the supersensitising effect is not explicitly disclosed

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)
  • Indole Compounds (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

518,478. Cyanine dye bases. KODAK, Ltd., and DAVEY; E. P. July 22, 1938, No. 21828. Drawings to Specification. [Class 2 (iii)] [Also in Group XX] Cyanine dye bases containing a quinoline nucleus are prepared by reacting a cyclammonium quaternary salt containing an alpha - or #-alkylmercapto group with quinaldine- or lepidine in the presence of pyridine. Carbocyanine dye bases are similarly prepared using an alpha - or 8-acetanilidovinyl derivative. The dye bases may also be prepared by heating the corresponding dyes with a large amount of diethylaniline.
GB2182838A 1938-07-22 1938-07-22 Improved sensitized photographic emulsions Expired GB518478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2182838A GB518478A (en) 1938-07-22 1938-07-22 Improved sensitized photographic emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2182838A GB518478A (en) 1938-07-22 1938-07-22 Improved sensitized photographic emulsions

Publications (1)

Publication Number Publication Date
GB518478A true GB518478A (en) 1940-02-28

Family

ID=10169490

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2182838A Expired GB518478A (en) 1938-07-22 1938-07-22 Improved sensitized photographic emulsions

Country Status (1)

Country Link
GB (1) GB518478A (en)

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