DE419428C - 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
DE419428C
DE419428C DEST38191D DEST038191D DE419428C DE 419428 C DE419428 C DE 419428C DE ST38191 D DEST38191 D DE ST38191D DE ST038191 D DEST038191 D DE ST038191D DE 419428 C DE419428 C DE 419428C
Authority
DE
Germany
Prior art keywords
selenium
bath
production
copying papers
photographic silver
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
DEST38191D
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 DEST38191D priority Critical patent/DE419428C/en
Application granted granted Critical
Publication of DE419428C publication Critical patent/DE419428C/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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)

Description

Verfahren zur Herstellung eines Selentonbades für photographische silberhaltige Entwicklungs- und Kopierpapiere. Verfahren zur Herstellung eines Selentonbades für photographische silberhaltige Entwicklungs- und Kopierpapiere. Die Erfindung betrifft die Herstellung eines Tonbades mit metalloidem Selen.Process for the preparation of a selenium bath for photographic use silver-containing developing and copying papers. Process for the production of a selenium bath for photographic developing and copying papers containing silver. The invention concerns the production of a clay bath with metalloid selenium.

Es ist bekannt, daß durch Lösen von Selen in Natriumsulfit eine brauchbare Tonungslüssigkeit für Entwicklungs- und Kopierpapiere entsteht. Die Löslichkei: des Selens in Sulfiten ist jedodli gering, und an eine weitere Verdünnung des an sich schon langsam arbeitenden Toners kann nach Ansicht des Erfinders nicht gedacht werden.It is known that by dissolving selenium in sodium sulfite a useful Toning liquid for developing and copying papers is created. The solubility: the selenium in sulphites is little, however, and a further dilution of the an According to the inventor, toner that is already working slowly cannot be thought of will.

Es wurde nun beobachtet, daß man erheblich stärkere Tonbäder mit Selen dadurch erhalten kann, wenn man das kolloide oder amorphe Selen des Handels mit Soda und Natriuanhydrosulfit kocht.It has now been observed that considerably stronger clay baths with selenium are used can be obtained by using the colloidal or amorphous selenium of the trade Soda and sodium hydrosulfite boil.

Man kocht also das Selen mit einer starken Sodalösu;ng und gibt in die kochende oder heiße Lösung Natriumhydrosulfit, bis alles Selen sieh zu einer grünbraunen Flüssigkeit gelöst hat.So you boil the selenium with a strong soda solution and give in the boiling or hot sodium hydrosulfite solution until all of the selenium looks to one green-brown liquid has dissolved.

Es ist hervorzuheben, daß durch das Kochen des Hydrosulfi:s bzw. Einbringen in eine heiße Sololösung eine Umsetzung stattfindet, die nicht darin bestehen kann, daß nur Sulfit und Thiosulfat entsteht, denn in der gemischten Lösung dieser beiden Salze löst sieh das Selen selbst beim Kochen nur ganz unbeträchtlich, und es entsteht eine rötlich klare Lösung, wenn vom Bodensatz abfiltriert wird. Auch löst Sulfit bzw. Thiosulfat oder das Gemisch beider nicht so spontan wie heiße Hydrosulfit-Sodalösung, was wiederum, neben der ganz spezifischen Farbe des neuen Präparates, für ein durchaus selbständiges Verfahren spricht.It should be emphasized that by boiling the hydrosulfi: s or introducing a conversion takes place in a hot solo solution that cannot consist of that only sulphite and thiosulphate arise, because in the mixed solution of these two The selenium itself only dissolves salts insignificantly when it is cooked, and it is formed a reddish clear solution if the sediment is filtered off. Sulphite also dissolves or thiosulphate or a mixture of both not as spontaneous as hot hydrosulphite soda solution, which in turn, in addition to the very specific color of the new preparation, for an absolutely independent procedure speaks.

Viel weniger gut löst sich Selen in kalter Hydrosulfit- und Hydrosulfit-Sodalösung. Tonbäder aus Natriumselenosulfat, unterschwefligsaurem Salz und einem mindestens das Zehnfache betragenden Gehalt an Nat:riumhydrosulfit sind bekannt.Selenium dissolves much less well in cold hydrosulfite and hydrosulfite soda solution. Clay baths made from sodium selenosulphate, hyposulphurous salt and at least one ten times the content of sodium hydrosulphite are known.

Claims (1)

PATENT-ANSrRUCH Verfahren der Herstellung eines Selentonbades für photographische silberhaltige Entwicklungs- und Auskopierpapiere, dadurch gekennzeichnet, d;aß man Selen durch Kochen in wäßriger Lösung von Soda unter Zugsatz von Hydrosulfitsalz in Lösung bringt.PATENT APPLICATION Process for the production of a selenium bath for Photographic silver-containing developing and copying papers, characterized in that d; Selenium was eaten by boiling in an aqueous solution of soda with the addition of hydrosulphite salt brings into solution.
DEST38191D 1924-07-16 1924-07-17 Process for the production of a selenium bath for photographic silver-containing developing and copying papers Expired DE419428C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEST38191D DE419428C (en) 1924-07-16 1924-07-17 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
DEST038191 1924-07-16
DEST38191D DE419428C (en) 1924-07-16 1924-07-17 Process for the production of a selenium bath for photographic silver-containing developing and copying papers

Publications (1)

Publication Number Publication Date
DE419428C true DE419428C (en) 1925-09-29

Family

ID=25994539

Family Applications (1)

Application Number Title Priority Date Filing Date
DEST38191D Expired DE419428C (en) 1924-07-16 1924-07-17 Process for the production of a selenium bath for photographic silver-containing developing and copying papers

Country Status (1)

Country Link
DE (1) DE419428C (en)

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