DE465458C - Selenium bath tablets for the production of selenium baths for photographic silver pictures - Google Patents
Selenium bath tablets for the production of selenium baths for photographic silver picturesInfo
- Publication number
- DE465458C DE465458C DEG70699D DEG0070699D DE465458C DE 465458 C DE465458 C DE 465458C DE G70699 D DEG70699 D DE G70699D DE G0070699 D DEG0070699 D DE G0070699D DE 465458 C DE465458 C DE 465458C
- Authority
- DE
- Germany
- Prior art keywords
- selenium
- baths
- production
- photographic silver
- bath
- 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
- G03C5/40—Chemically transforming developed images
- G03C5/46—Toning
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
Selentonbad-Tabletten zur Herstellung von Selentonbädern für photographische Silberbilder ach der Patentschrift 403 588 lassen sich Selentonbäder für photographische Silberbilder durch Auflösen von elementarem Selen in wässerigen Baryumsulfidlösungen= bzw. durch Auflösen eines Gemenges von Baryumsulfid und elementarem Selen in Wasser herstellen. Es sind auch Selentonbäder bekannt, denen zur Erhöhung der Viskosität der Lösungen bestimmte Zusatzmittel zugefügt werden, um dadurch zugleich die Haltbarkeit der Tonbadlösungen zu verbessern, wie in der Patentschrift 334 172 angegeben wurde. Diese Selentonbäder nach den Patentschriften 403 588 und 334 172 haben den Nachteil, daß sie nur in für die Verarbeitung zu Tonungszwecken geeigneten Lösungen hergestellt und vertrieben werden können, deren Haltbarkeit - trotz der in der Patentschrift 334 j72 zur Verbesserung der Haltbarkeit angegebenen Erhöhung der Viskosität - nur eine eng begrenzte ist.Selenium bath tablets for producing selenium baths for photographic silver images According to patent specification 403 588, selenium baths for photographic silver images can be produced by dissolving elemental selenium in aqueous barium sulfide solutions or by dissolving a mixture of barium sulfide and elemental selenium in water. Selenium baths are also known to which certain additives are added to increase the viscosity of the solutions in order to improve the durability of the clay bath solutions at the same time, as was indicated in patent 334 172. These selenium baths according to patents 403 588 and 334 172 have the disadvantage that they can only be produced and sold in solutions suitable for processing for toning purposes, the durability of which - despite the increase in viscosity specified in patent 334 j72 to improve durability - is only a very limited one.
Diesen Nachteil der bekannten Selentonbäder vermeidet die vorliegende Erfindung, welcher als leitender Gedanke die Herstellung von Selentonbädern aus Selentonbadpräparaten in der für die Praxis sehr bequemen und beliebten Tablettenform zugrunde liegt. Aus dem einfachen Gemenge von Baryumsulfid und elementarem Selen, das in der Patentschrift 403 588 angegeben ist, lassen sich der geringen Adhäsion dieser Bestandteile wegen geeignete Selentonbad-Tabletten auch durch starken Preßdruck nicht herstellen. Es gelingt dies aber sehr leicht nach Zusatz geeigneter Körper zu diesem Gemenge, wenn diese Körper so gewählt werden, daß sie, ohne den Tonungsprozeß des daraus bereiteten Selentonbades selbst zu beeinflussen, dem Gemenge der Tonbadbestandteile eine wesentlich stärkere Adhäsion zuteilen. Als solche geeignete Zusatzkörper zur Herstellung von Selentonbad-Tabletten aus einem Gemenge von Baryumsulfid und elementarem Selen nach der Patentschrift 403 588 lassen sich beispielsweise Dextrin, Zucker und andere gleichartig wirkende Körper verwenden.The present one avoids this disadvantage of the known selenium baths Invention, which led to the production of selenium baths Selenium bath preparations in the tablet form, which is very convenient and popular in practice underlying. From the simple mixture of barium sulfide and elemental selenium, which is given in the patent specification 403 588, can be the low adhesion Because of these ingredients, suitable selenium bath tablets are also used by strong pressure not manufacture. However, this is very easy to do after adding suitable bodies to this mixture, if these bodies are chosen in such a way that they can be without the toning process to influence the selenium bath itself prepared from it, the mixture of the clay bath components allot a much stronger adhesion. As such suitable additional body for Production of selenium bath tablets from a mixture of barium sulfide and elemental Selenium according to patent specification 403 588 can be, for example, dextrin, sugar and use other similar looking bodies.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG70699D DE465458C (en) | 1927-07-06 | 1927-07-07 | Selenium bath tablets for the production of selenium baths for photographic silver pictures |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG0070699 | 1927-07-06 | ||
DEG70699D DE465458C (en) | 1927-07-06 | 1927-07-07 | Selenium bath tablets for the production of selenium baths for photographic silver pictures |
Publications (1)
Publication Number | Publication Date |
---|---|
DE465458C true DE465458C (en) | 1928-09-18 |
Family
ID=25979058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEG70699D Expired DE465458C (en) | 1927-07-06 | 1927-07-07 | Selenium bath tablets for the production of selenium baths for photographic silver pictures |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE465458C (en) |
-
1927
- 1927-07-07 DE DEG70699D patent/DE465458C/en not_active Expired
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