DE708424C - Manufacture of extremely sensitive photographic emulsions - Google Patents

Manufacture of extremely sensitive photographic emulsions

Info

Publication number
DE708424C
DE708424C DED74638D DED0074638D DE708424C DE 708424 C DE708424 C DE 708424C DE D74638 D DED74638 D DE D74638D DE D0074638 D DED0074638 D DE D0074638D DE 708424 C DE708424 C DE 708424C
Authority
DE
Germany
Prior art keywords
manufacture
sensitive photographic
photographic emulsions
extremely sensitive
emulsions
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
DED74638D
Other languages
German (de)
Inventor
Dr-Ing Ulrich Schmieschek
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.)
Deutsche Versuchsanstalt fuer Luftfahrt eV
Original Assignee
Deutsche Versuchsanstalt fuer Luftfahrt eV
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 Deutsche Versuchsanstalt fuer Luftfahrt eV filed Critical Deutsche Versuchsanstalt fuer Luftfahrt eV
Priority to DED74638D priority Critical patent/DE708424C/en
Application granted granted Critical
Publication of DE708424C publication Critical patent/DE708424C/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
    • G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression

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)

Description

Herstellung höchstempfindlicher photographischer Emulsionen Zusatz zum Patent 708 423 Im Patent 708 423 wurde ein Weg zur Herstellung höchstempfindlicher photographischer Emulsionen beschrieben, der im Prinzip darauf beruht, daß die Emulsionen in Lösungen von Alkalihydroxyden und stabilisierend wirkenden Halogenverbindungen gebadet wurden.Production of highly sensitive photographic emulsions Addition to patent 708 423 In patent 708 423 a method for the production of highly sensitive photographic emulsions was described, which is based in principle on the emulsions being bathed in solutions of alkali hydroxides and stabilizing halogen compounds.

Es hat sich gezeigt, daß die Alkalihalogenide in den Bädern vorteilhafterweise durch organische Stabilisatoren, wie z. B. i. Nitroharnstoff, 2. Succinimid, 3. L-Histidinmonochlorhydrat, .4. Imidazol, 5. Thiomilchsäure, 6. Propionamid ° und weitere ran sich bekannte Stabilisatoren, ersetzt werden können.It has been shown that the alkali halides in the baths are advantageous by organic stabilizers, such as. B. i. Nitrourea, 2nd succinimide, 3rd L-histidine monochlorohydrate, .4. Imidazole, 5. thiolactic acid, 6. propionamide ° and other well-known stabilizers can be replaced.

Der Vorteil der Verwendung der organischen Stabilisatoren 'steht darin, daß insbesondere die Farbenempfindlichkeit derartig behandelter Emulsionen in geringerem Maßte beim Lagern abnimmt als bei Verwendung von Alkalihalogeniden. Beispiel Agfa-Infrarot-Platten 850 (.;Agfa« geschütztes Warenzeichen) werden 5 Minuten lang bei etwa 13° C in .einer 0,03 bis o, i %igen KOH-Lö@s.ung gebadet, darauf bei gleicher Temperatur i o Minuten in destilliertem Wasser gewässert und ;anschließend bei gleicher Temperatur 5 Minuten in o,oi bis o,ooi%igen; wäßrigen Lösungen der genannten organischen Stabilisatoren gebadet. Anschließend werden die Platten entweder sofort getrocknet bzw. nochmalig io Minuten bei ebenfalls etwa 13°C in destilliertem Wasser gebadet und dann erst getrocknet. Sowohl bei normaler Temperatur als auch im erwärmten Luftstrom kann getrocknet werden. Es ist jedoch nicht zweckmäßig, Über eine Trocknungstemp:eratur von. 35°C hinauszugehen.The advantage of using the organic stabilizers is that in particular the color sensitivity of emulsions treated in this way decreases to a lesser extent on storage than when using alkali halides. Example Agfa infrared plates 850 (.; Agfa "registered trademark) are bathed for 5 minutes at about 13 ° C. in a 0.03 to 0.1% strength KOH solution, then at the same temperature io Soaked for minutes in distilled water and then at the same temperature for 5 minutes in o, oi to o, ooi% igen; bathed in aqueous solutions of the organic stabilizers mentioned. The plates are then either dried immediately or bathed again in distilled water for 10 minutes at about 13 ° C. and only then dried. Drying can be carried out both at normal temperature and in a heated air stream. However, it is not advisable to have a drying temperature of. 35 ° C.

Claims (1)

YATRN TAIQSPRUCÜ Herstellung höchstempfindlicher photographischer Emulsionen nach Patent 708 423, dadurch gekennzeichnet, daß die Alkalihalogenide durch an sich bekannte organische Stabilisatoren ersetzt werden.YATRN TAIQSPRUCÜ Manufacture of highly sensitive photographic products Emulsions according to Patent 708 423, characterized in that the alkali halides be replaced by known organic stabilizers.
DED74638D 1937-02-19 1937-02-19 Manufacture of extremely sensitive photographic emulsions Expired DE708424C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED74638D DE708424C (en) 1937-02-19 1937-02-19 Manufacture of extremely sensitive photographic emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED74638D DE708424C (en) 1937-02-19 1937-02-19 Manufacture of extremely sensitive photographic emulsions

Publications (1)

Publication Number Publication Date
DE708424C true DE708424C (en) 1941-07-21

Family

ID=7061716

Family Applications (1)

Application Number Title Priority Date Filing Date
DED74638D Expired DE708424C (en) 1937-02-19 1937-02-19 Manufacture of extremely sensitive photographic emulsions

Country Status (1)

Country Link
DE (1) DE708424C (en)

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