DE433259C - Process for the production of daylight developers for photographic plates and the like like - Google Patents

Process for the production of daylight developers for photographic plates and the like like

Info

Publication number
DE433259C
DE433259C DEB120613D DEB0120613D DE433259C DE 433259 C DE433259 C DE 433259C DE B120613 D DEB120613 D DE B120613D DE B0120613 D DEB0120613 D DE B0120613D DE 433259 C DE433259 C DE 433259C
Authority
DE
Germany
Prior art keywords
daylight
production
developers
sodium
photographic plates
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
DEB120613D
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.)
KARL BINDER DR
Original Assignee
KARL BINDER DR
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 KARL BINDER DR filed Critical KARL BINDER DR
Priority to DEB120613D priority Critical patent/DE433259C/en
Priority to FR600801D priority patent/FR600801A/en
Application granted granted Critical
Publication of DE433259C publication Critical patent/DE433259C/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
    • G03C5/29—Development processes or agents therefor
    • G03C5/30—Developers
    • G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring
    • 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
    • G03C5/29—Development processes or agents therefor
    • G03C5/30—Developers

Landscapes

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

Description

Verfahren zur Herstellung von Tageslichtentwicklern für photographische Platten u. dgl. Die nach dem Verfahren des Hauptpatents 43o986 entwickelten Platten haben den Nachteil, daß -sie nach dem Fixieren eine schwach bräunlich bis rötlich-bräunlich gefärbte Schicht aufweisen. Diese ist insofern nachteilig, als sie eine etwas längere Kopierdauer zur Herstellung von Positiven bedingt.Process for the production of daylight developers for photographic applications Plates and the like The plates developed by the method of main patent 43o986 have the disadvantage that they have a slightly brownish to reddish-brownish color after fixing have colored layer. This is disadvantageous in that it is a somewhat longer one Copying time for the production of positives is conditional.

Dieser Übelstand wird nun gemäß vorliegender Erfindung dadurch-beseitigt, daß dem nach dem Hauptpatent hergestellten Tagesiichtentwickler ein wasserlösliches Sulfit zugesetzt wird. Durch diesen Zusatz wird der genannte Übelstand in vollkommener Weise beseitigt. Die Plattenschicht wird trotzdem in jeder Beziehung normal, wie sie beispielsweise auch in normaler Zeit kopiert.According to the present invention, this deficiency is now eliminated by that the day light developer produced according to the main patent is a water-soluble one Sulphite is added. With this addition, the above-mentioned evil becomes more complete Way eliminated. The plate layer will still be normal in every respect, like for example, they also copied in normal time.

Das Verfahren sei durch folgendes Ausführungsbeispiel erläutert.The method is explained by the following exemplary embodiment.

Zur Herstellung des Entwicklers werden die zu entwickelnden Platten, z. B. Hauff-Ultra-Rapid-Platten, nach der Belichtung bei rotem Lichte oder in einem dunklen Raume oder unter einem absolut lichtdichten Tuche in den genannten Entwickler gebracht, worauf sogleich das elektrische Licht eingeschaltet oder dem Tageslicht der Zutritt gestattet werden kann. Nach zwei Minuten kann die Platte zur Beobachtung des Entwicklungsfortschrittes sowohl bei elektrischem hellen wie auch bei Tageslicht aus dem Bade herausgenommen werden. Nach erfolgter Entwicklung der Platte wird dieselbe mit Wasser abgespült und in einem Fixierbad von folgender Zusammensetzung fixiert: 25 g Natriumthiosulfat, 5 g Natriumbisulfit, 70 g destilliertes Wasser. Damit ist die Platte fertig entwickelt.To produce the developer, the plates to be developed, e.g. B. Hauff Ultra Rapid plates, after exposure to red light or in a dark room or under an absolutely light-tight cloth in the developer mentioned, whereupon the electric light can be switched on or daylight can be allowed access. After two minutes, the plate can be taken out of the bath to observe the development progress in both electric light and daylight. After the plate has been developed, it is rinsed with water and fixed in a fixing bath with the following composition: 25 g sodium thiosulphate, 5 g sodium bisulphite, 70 g distilled water. The plate is now fully developed.

Claims (3)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung von Tageslichtentwicklern für photographische Platten nach Patent 430986, dadurch gekennzeichnet, daß dem Entwickler ein wasserlösliches Sulfit zugesetzt wird. PATENT CLAIMS: i. Process for the production of daylight developers for photographic plates according to Patent 430986, characterized in that a water-soluble sulfite is added to the developer. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß als wasserlösliches Sulfit Natriumsulfit benutzt wird. 2. The method according to claim i, characterized in that sodium sulfite is used as the water-soluble sulfite will. 3. Verfahren nach Ansprüchen i und 2, dadurch gekennzeichnet, daß dem Entwickler folgende Zusammensetzung gegeben wird: 2 g Tribrenzcatechin-ferrisaures Kalium, 5 g Natr iumsulfit, krist., Zoo g destilliertes Wasser, io ccm zehnprozentige Kaliumhydroxydlösung. .1 .. Verfahren nach Ansprüchen i bis 3, dadurch gekennzeichnet, daß ein Fixierbad von folgender Zusammensetzung Verwendung findet: 25 g Natriumthiosulfat, 5 g Natriumbisulfit, 7o g destilliertes Wasser.3. The method according to claims i and 2, characterized in that the developer the following composition is given: 2 g tribrenzcatechol-ferric acid potassium, 5 g sodium sulphite, crystalline, zoo g distilled water, 10 cc ten percent potassium hydroxide solution. .1 .. Process according to Claims i to 3, characterized in that a fixing bath of the following composition is used: 25 g sodium thiosulphate, 5 g sodium bisulphite, 70 g of distilled water.
DEB120613D 1925-07-02 1925-07-02 Process for the production of daylight developers for photographic plates and the like like Expired DE433259C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEB120613D DE433259C (en) 1925-07-02 1925-07-02 Process for the production of daylight developers for photographic plates and the like like
FR600801D FR600801A (en) 1925-07-02 1925-07-15 Process for preparing developers for daylight development of photographic plates or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB120613D DE433259C (en) 1925-07-02 1925-07-02 Process for the production of daylight developers for photographic plates and the like like

Publications (1)

Publication Number Publication Date
DE433259C true DE433259C (en) 1926-08-25

Family

ID=6995323

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB120613D Expired DE433259C (en) 1925-07-02 1925-07-02 Process for the production of daylight developers for photographic plates and the like like

Country Status (2)

Country Link
DE (1) DE433259C (en)
FR (1) FR600801A (en)

Also Published As

Publication number Publication date
FR600801A (en) 1926-02-16

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