DE333687C - Photographic developer - Google Patents
Photographic developerInfo
- Publication number
- DE333687C DE333687C DE1920333687D DE333687DA DE333687C DE 333687 C DE333687 C DE 333687C DE 1920333687 D DE1920333687 D DE 1920333687D DE 333687D A DE333687D A DE 333687DA DE 333687 C DE333687 C DE 333687C
- Authority
- DE
- Germany
- Prior art keywords
- photographic developer
- developer
- sulfonic acids
- amido
- compounds
- 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
- G03C5/30—Developers
- G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
Bei Ausdehnung der Untersuchungen über den Einfluß der Seitenketten der Sulfosäuren der Amido- und Diamidophenole auf ihre photographischen Entwicklereigenschaften auf die Sulfosäuren der Amido- und Diamidokresole wurde gefunden, daß diese Verbindungen in ihren ätzalkalischen Lösungen dieselben hervorragenden Entwicklereigenschaften besitzen, wie ihre Stammsubstanzen, die in dem Patent 328617 genannt sind. Vor allem ist auch bei diesen Verbindungen bemerkenswert das große, noch bei keiner anderen Entwicklersubstanz beobachtete Ausgleichsvermögen bei den verschiedensten Belichtungsunterschieden, so daß Fehlresultate innerhalb der in der Praxis vorkommenden Belichtungsfehler so gut wie ausgeschlossen sind. Da die Gegenwart der Methylgruppe im Kern der Verbindungen eine geringe Verzögerung der Entwicklungsgeschwindigkeit bedingt, so arbeiten diese Verbindungen besonders weich, wobei bei der Möglichkeit einer langen schleier freien Entwicklung in den Schatten besonders viel herausgeholt werden kann, ohne daß die Lichter zu kreidig werden. Die im Patent 327111 und in dem Hauptpatent 328617 hervorgehobenen neuen Eigenschaften und Vorzüge der neuen Entwicklersubstanzen gelten auch in vollem Maße für die Sulfosäuren der Amido- und Diamidokresole.With extension of the investigations on the influence of the side chains of the sulfonic acids of the amido and diamidophenols on their photographic developer properties The sulfonic acids of the amido and diamidocresols have been found to be these compounds the same excellent developer properties in their caustic alkaline solutions like their parent substances mentioned in the patent 328617. before In all these connections, too, the great thing is noteworthy, and not yet in any other Developer substance observed equilibrium with the most varied of exposure differences, so that incorrect results within the exposure errors that occur in practice are as good as impossible are. Because the presence of the methyl group in the core of the compounds is a slight delay Due to the speed of development, these compounds work particularly well soft, with the possibility of a long veil-free development in The shadow can be extracted a lot without making the lights too chalky will. The new ones highlighted in patent 327111 and main patent 328617 Properties and advantages of the new developer substances also apply in full to the sulfonic acids of the amido and Diamidocresols.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE327111T | 1918-10-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE333687C true DE333687C (en) | 1921-05-12 |
Family
ID=5676192
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1918327111D Expired DE327111C (en) | 1918-10-23 | 1918-10-23 | Photographic developer |
DE1918328617D Expired DE328617C (en) | 1918-10-23 | 1918-12-09 | Photographic developer |
DE1920333687D Expired DE333687C (en) | 1918-10-23 | 1920-04-17 | Photographic developer |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1918327111D Expired DE327111C (en) | 1918-10-23 | 1918-10-23 | Photographic developer |
DE1918328617D Expired DE328617C (en) | 1918-10-23 | 1918-12-09 | Photographic developer |
Country Status (3)
Country | Link |
---|---|
DE (3) | DE327111C (en) |
FR (1) | FR525794A (en) |
GB (1) | GB154198A (en) |
-
1918
- 1918-10-23 DE DE1918327111D patent/DE327111C/en not_active Expired
- 1918-12-09 DE DE1918328617D patent/DE328617C/en not_active Expired
-
1920
- 1920-04-17 DE DE1920333687D patent/DE333687C/en not_active Expired
- 1920-10-11 FR FR525794D patent/FR525794A/en not_active Expired
- 1920-11-22 GB GB32883/20A patent/GB154198A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB154198A (en) | 1922-05-22 |
DE327111C (en) | 1921-02-07 |
FR525794A (en) | 1921-09-27 |
DE328617C (en) | 1921-02-07 |
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