DE865259C - Photographic developer - Google Patents
Photographic developerInfo
- Publication number
- DE865259C DE865259C DEP2023A DEP0002023A DE865259C DE 865259 C DE865259 C DE 865259C DE P2023 A DEP2023 A DE P2023A DE P0002023 A DEP0002023 A DE P0002023A DE 865259 C DE865259 C DE 865259C
- Authority
- DE
- Germany
- Prior art keywords
- developer
- developing
- photographic developer
- electrolysis
- substance
- 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
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
- G03C5/31—Regeneration; Replenishers
Description
Photographischer Entwickler Gegenstand der Erfindung ist ein Entwickler für belichtetes Halogensilber, der neben der zum Entwickeln erforderlichen carbocyclischen Entwicklungssubstanz auch noch an sich nicht entwickelnde Ausgangsprodukte für ihre elektrolytische Darstellung und nötigenfalls die sonst zum photographischen Entwickeln üblichen Elektrolyte, wie Sulfite, Bromkali u. dgl., enthält.Photographic developer The invention provides a developer for exposed halogen silver, the carbocyclic silver required for developing Development substance also still to non-developing starting products for their electrolytic representation and, if necessary, that otherwise for photographic development the usual electrolytes such as sulfites, potassium bromide and the like.
Das Neue des Entwicklers besteht darin, daß neben der entwickelnden Substanz auch noch diejenigen Stoffe in ihm enthalten sind, aus denen die entwickelnde Substanz durch Elektrolyse entsteht, so daß ein solcher Entwickler jederzeit regeneriert werden kann, ohne daß das Entwicklungsvermögen durch. in ihm enthaltene Begleitstoffe irgendwie beeinträchtigt wird und die Zusammensetzung geändert werden muß.The novelty of the developer consists in the fact that in addition to the developing Substance also contains those substances from which the developing one is contained Substance is created by electrolysis, so that such a developer regenerates at any time can be without the development ability by. accompanying substances contained in it is affected somehow and the composition must be changed.
So enthält ein Entwickler nach der neuen Erfindung beispielsweise eine konzentrierte Lösung von p-Nitrophenol (etwa o,13 molar) und Ätznatron in Gegenwart von etwas Sulfit. Aus diesen Elektrolyten bildet sich bei der Elektrolyse vermutlich u. a. eine Sulfosäure des a-Amino-ß-naphthols, der hohes Entwicklungsvermögen zukommt. Ist die entwickelnde Substanz verbraucht, so bedarf es nur der weiteren Elektrolyse des Entwicklers, um-- ihm wieder ein Reduktionsvermögen. zu geben, das bei der Entwicklung den gleichen 7-Wert gewährleistet.For example, a developer according to the new invention contains a concentrated solution of p-nitrophenol (about 0.13 molar) and caustic soda in the presence of some sulfite. These electrolytes are presumably formed during electrolysis i.a. a sulfonic acid of α-amino-β-naphthol, which has high developability. If the developing substance is used up, it only needs further electrolysis of the developer, to - give him a power of reduction again. admit, which guarantees the same 7 value during development.
a-Amino-ß-naphtholsulfosäure, die in dem gewählten Beispiel vermutlich als entwickelnde Substanz anzusprechen ist, ist der einschlägigen Technik seit langer Zeit als photographisch brauchbarer Entwickler an sich bekannt. Neu ist demgegenüber aber der Gedanke, als Entwickler nicht das entwickelnde Produkt allein zu verwenden, sondern dieses bei Anwesenheit seiner Vorprodukte anzuwenden, um so jederzeit die Möglichkeit zu haben, das Entwicklungsvermögen des fertigen Entwicklers durch einfache Elektrolyse auf der jeweils gewünschten Höhe zu halten:α-Amino-ß-naphtholsulfonic acid, which in the example chosen presumably to be addressed as developing substance has been the relevant technology for a long time Time known per se as a photographically useful developer. What is new on the other hand but the thought of not using the developing product alone as a developer, but to use this in the presence of its preliminary products, so that at any time the To have the ability to develop the development capabilities of the finished developer through simple To keep electrolysis at the desired level:
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2023A DE865259C (en) | 1949-03-01 | 1949-03-01 | Photographic developer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2023A DE865259C (en) | 1949-03-01 | 1949-03-01 | Photographic developer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE865259C true DE865259C (en) | 1953-02-02 |
Family
ID=7357669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEP2023A Expired DE865259C (en) | 1949-03-01 | 1949-03-01 | Photographic developer |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE865259C (en) |
-
1949
- 1949-03-01 DE DEP2023A patent/DE865259C/en not_active Expired
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