GB498388A - An improvement in the production of photographic developing paper - Google Patents

An improvement in the production of photographic developing paper

Info

Publication number
GB498388A
GB498388A GB1854437A GB1854437A GB498388A GB 498388 A GB498388 A GB 498388A GB 1854437 A GB1854437 A GB 1854437A GB 1854437 A GB1854437 A GB 1854437A GB 498388 A GB498388 A GB 498388A
Authority
GB
United Kingdom
Prior art keywords
improvement
production
condensing
photographic developing
developing paper
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
GB1854437A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB1854437A priority Critical patent/GB498388A/en
Publication of GB498388A publication Critical patent/GB498388A/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
    • G03C1/10—Organic substances
    • G03C1/12—Methine and polymethine dyes
    • G03C1/14—Methine and polymethine dyes with an odd number of CH groups
    • G03C1/18—Methine and polymethine dyes with an odd number of CH groups with three CH groups

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)
  • Paper (AREA)

Abstract

Oxathiazolino-carbocyanine dyes for sensitization in photography are obtained by a process analogous to that described in Specification 353,863 by condensing a thiazoline and an oxazole in pyridine. The dyestuff 1-ethyl-11-methyl-benzoxothiazolino-carbocyanine iodide is obtained by condensing 2-methylthiazoline methiodide, in pyridine as condensing agent, with the intermediate condensation product of 2-methylbenzoxazole ethiodide and diphenylformamidine. 1-Ethyl-11-methyl-b : b 1-naphthoxothiazolino-carbocyanine iodide, and 1 : 11-diethyl - 6 - methoxy - benzoxothiazolino carbocyanine iodide are obtained in similar manner.
GB1854437A 1937-07-03 1937-07-03 An improvement in the production of photographic developing paper Expired GB498388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1854437A GB498388A (en) 1937-07-03 1937-07-03 An improvement in the production of photographic developing paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1854437A GB498388A (en) 1937-07-03 1937-07-03 An improvement in the production of photographic developing paper

Publications (1)

Publication Number Publication Date
GB498388A true GB498388A (en) 1939-01-03

Family

ID=10114255

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1854437A Expired GB498388A (en) 1937-07-03 1937-07-03 An improvement in the production of photographic developing paper

Country Status (1)

Country Link
GB (1) GB498388A (en)

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