DE426661C - Bleacher for the photographic bromine printing process - Google Patents

Bleacher for the photographic bromine printing process

Info

Publication number
DE426661C
DE426661C DEM90735D DEM0090735D DE426661C DE 426661 C DE426661 C DE 426661C DE M90735 D DEM90735 D DE M90735D DE M0090735 D DEM0090735 D DE M0090735D DE 426661 C DE426661 C DE 426661C
Authority
DE
Germany
Prior art keywords
bromine
photographic
bleacher
printing process
chloride
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
DEM90735D
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE426661C publication Critical patent/DE426661C/en
Expired legal-status Critical Current

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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
    • G03C5/44—Bleaching; Bleach-fixing

Landscapes

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

Description

Bleicher für das photographische Bromöldruckverfahren. Die Bleichpräparate, welche für das Bromöldruckverfahren bestimmt sind, haben die Funktion, gleichzeitig mit der Auflösung des in einem Bromsilberdrucke vorhandenen metallischen Silbers eine Quellung der Gelatänieschicht hervorzurufen, welche dem Silberniederschlage proportional ist. Es gibt nur wenige Lösungsmittel für Silber, welche gleichzeitig die Gerbung im obengedachten Sinne bewirken. Sie - werden aus Kupfersulfat und Kaliumbichromat einerseits, Kaliumbromid oder \ atriumchlorid andererseits zusammengesetzt. Die Bleichpräparate, in welchen Kaliumbromid vorkommt, entfalten ihre Wirkung erst, wenn ihren Lösungen flüssige Salzsäure zugesetzt wird. Jene Bleichpräparate, welche Natriumchlorid enthalten, bleichen zwar auch ohne Salzsäure, jedoch nicht so vollkommen, und ergeben da-@M. starke, störende Niederschläge.Bleaching agents for the photographic bromine oil printing process. The bleaching preparations, which are intended for the bromine pressure process have the function of simultaneously with the dissolution of the metallic silver present in a silver bromide print to cause swelling of the gelatinous layer, which is the precipitate of silver is proportional. There are only a few solvents for silver that work at the same time cause the tanning in the sense mentioned above. They - are made from copper sulfate and potassium dichromate on the one hand, potassium bromide or \ atrium chloride on the other. the Bleaching preparations containing potassium bromide only develop their effect when when liquid hydrochloric acid is added to their solutions. Those bleaching preparations which Contain sodium chloride, bleach even without hydrochloric acid, but not so completely, and result in @ M. heavy, disruptive precipitation.

Gegenstand der Erfindung ist ein Bleichpräparat, welches aus Kupfersulfat und einem Alkalibichromat einerseits, einem Alkalibromid oder einem wasserlöslichen Chlorid andererseits zusammengesetzt ist, aber unter Hinzufügung des Trockenpräparates Betainchloridhydrat. Bei der Auflösung des Präparates spaltet das Betainchloridhydrat freie Salzsäure ab; hierdurch wird bei der Zusammensetzung mit einem Alkalibromid die Bleichfunktion erst ermöglicht. Bei der Zusammensetzung mit einem Alkalichlorid oder einem anderen Chlorid wird die Bleichtätigkeit erhöht und das Entstehen der störenden -Niederschläge vermieden.The invention relates to a bleaching preparation which is made from copper sulfate and an alkali dichromate on the one hand, an alkali bromide or a water-soluble one Chloride, on the other hand, is composed, but with the addition of the dry preparation Betaine chloride hydrate. When the preparation is dissolved, the betaine chloride hydrate splits free hydrochloric acid from; this will result in the composition with an alkali bromide only enables the bleaching function. When composing with an alkali chloride or another chloride, the bleaching activity is increased and the formation of the annoying precipitation avoided.

BeispielsweiseZusammensetzung desBleichpräparates: -Natriumchlorid oder Kaliumbrornid io g, Betainchlorhydrat 172 g, Kupfersulfat 5 g, Kaliumbichromat i g. Beim Gebrauch wird das Präparat in zoo cma Wasser gelöst.For example, the composition of the bleaching preparation: -sodium chloride or potassium bromide 10 g, betaine chlorohydrate 172 g, copper sulfate 5 g, potassium dichromate i g. During use, the preparation is dissolved in zoo cma water.

Dieses Gemisch ergibt einen brauchbaren Bleicher für das Bromöldruck-verfahren in trockener Form, ohne daß seiner Lösung flüssige Salzsäure beigesetzt werden muß.This mixture makes a useful bleach for the bromine pressure process in dry form without the need to add liquid hydrochloric acid to its solution.

Claims (1)

PATENTANSPRUCH: Bleicher für das photographische Bromöldruckverfahren, bestehend aus Kupfersulfat und einem Alkalibichromat, vorzugsweise Kaliumbichromat, und aus einem wasserlöslichen Chlorid, wie Natriumchlorid oder statt -dessen aus Kaliumbromid, gekennzeichnet durch den Zusatz von Betainchlorhydrat.PATENT CLAIM: bleacher for the photographic bromine oil printing process, consisting of copper sulfate and an alkali dichromate, preferably potassium dichromate, and from a water-soluble chloride such as sodium chloride or instead Potassium bromide, characterized by the addition of betaine chlorohydrate.
DEM90735D 1924-12-01 1925-07-29 Bleacher for the photographic bromine printing process Expired DE426661C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT426661X 1924-12-01

Publications (1)

Publication Number Publication Date
DE426661C true DE426661C (en) 1926-03-13

Family

ID=3674035

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM90735D Expired DE426661C (en) 1924-12-01 1925-07-29 Bleacher for the photographic bromine printing process

Country Status (1)

Country Link
DE (1) DE426661C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3234467A1 (en) * 1981-10-29 1983-05-11 DEFA Zentralstelle für Filmtechnik, Wissenschaftlich-technisches Zentrum, DDR 1197 Berlin Quinone-containing solution, in particular photographic bleach bath

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3234467A1 (en) * 1981-10-29 1983-05-11 DEFA Zentralstelle für Filmtechnik, Wissenschaftlich-technisches Zentrum, DDR 1197 Berlin Quinone-containing solution, in particular photographic bleach bath

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