DE422297C - Process for the production of a selenium bath for photographic silver-containing developing and copying papers - Google Patents

Process for the production of a selenium bath for photographic silver-containing developing and copying papers

Info

Publication number
DE422297C
DE422297C DEST39378D DEST039378D DE422297C DE 422297 C DE422297 C DE 422297C DE ST39378 D DEST39378 D DE ST39378D DE ST039378 D DEST039378 D DE ST039378D DE 422297 C DE422297 C DE 422297C
Authority
DE
Germany
Prior art keywords
selenium
bath
production
photographic silver
copying papers
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
DEST39378D
Other languages
German (de)
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.)
Leonar Werke Arndt & Loewengar
Original Assignee
Leonar Werke Arndt & Loewengar
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 Leonar Werke Arndt & Loewengar filed Critical Leonar Werke Arndt & Loewengar
Priority to DEST39378D priority Critical patent/DE422297C/en
Application granted granted Critical
Publication of DE422297C publication Critical patent/DE422297C/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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/40—Chemically transforming developed images
    • G03C5/46—Toning

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Description

Verfahren zur Herstellung eines Selentonbades für photographische silberhaltige Entwicklungs- und Kopierpapiere.Process for the preparation of a selenium bath for photographic use silver-containing developing and copying papers.

Zusatz zum Patent 419428. Nach dem Hauptpatent 4I9428 wird die Herstellung des Selentonbades bei Anwesenheit von Soda in der wässerigen Selenaufschwemmung ausgeführt, und zwar mit Vorteil bei erhöhter Temperatur.Addition to patent 419428. After the main patent 4I9428 the production the selenium bath in the presence of soda in the aqueous selenium suspension carried out, and with advantage at an elevated temperature.

Es hat sich gezeigt, daß mit demselben und teils noch besseren Erfolgen auch andere alkalisch reagierende Stoffe Verwendung finden können, z. B. Natriumsulfit, Ammoniak, organische Ammoniumbasen und auch Alkalien wie Atznatron und Ätzkalilösungen. Sehr günstige Tonwirkungen können durch geeignete Mischungen der alkalischen Bestandteile erzielt werden. Dabei ist es gleich-. -gültig, ob die alkalischen Reagenzien der Selenaufschwemmung oder der Hydrosulfitlösung oder beiden Lösungen zugesetzt werden.It has been shown that with the same and sometimes even better results other alkaline substances can also be used, e.g. B. sodium sulfite, Ammonia, organic ammonium bases and also alkalis such as caustic soda and caustic potash solutions. Very beneficial clay effects can be achieved by suitable mixtures of the alkaline components be achieved. It is the same. -valid whether the alkaline reagents of the Selenium suspension or the hydrosulfite solution or both solutions can be added.

Claims (1)

PATENTANSPRUCH: Ausführung des Verfahrens der Herstellung eines Selentonbades nach Patent 419428, dadurch gekennzeichnet, daß man das Selen in Hydrosulfitlösung in Gegenwart anderer alkalisch reagierender Stoffe als Soda in Lösung bringt. PATENT CLAIM: Execution of the process for the production of a selenium bath according to patent 419428, characterized in that the selenium is dissolved in hydrosulphite solution in the presence of other alkaline substances than soda.
DEST39378D 1924-11-10 1924-11-11 Process for the production of a selenium bath for photographic silver-containing developing and copying papers Expired DE422297C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEST39378D DE422297C (en) 1924-11-10 1924-11-11 Process for the production of a selenium bath for photographic silver-containing developing and copying papers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEST039378 1924-11-10
DEST39378D DE422297C (en) 1924-11-10 1924-11-11 Process for the production of a selenium bath for photographic silver-containing developing and copying papers

Publications (1)

Publication Number Publication Date
DE422297C true DE422297C (en) 1925-11-27

Family

ID=25994555

Family Applications (1)

Application Number Title Priority Date Filing Date
DEST39378D Expired DE422297C (en) 1924-11-10 1924-11-11 Process for the production of a selenium bath for photographic silver-containing developing and copying papers

Country Status (1)

Country Link
DE (1) DE422297C (en)

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