DE465373C - Photographic attenuators consisting of blood liquor salt and rhodanammonium - Google Patents
Photographic attenuators consisting of blood liquor salt and rhodanammoniumInfo
- Publication number
- DE465373C DE465373C DEH115294D DEH0115294D DE465373C DE 465373 C DE465373 C DE 465373C DE H115294 D DEH115294 D DE H115294D DE H0115294 D DEH0115294 D DE H0115294D DE 465373 C DE465373 C DE 465373C
- Authority
- DE
- Germany
- Prior art keywords
- rhodanammonium
- photographic
- attenuators
- liquor salt
- blood liquor
- 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
- 239000008280 blood Substances 0.000 title claims description 6
- 210000004369 blood Anatomy 0.000 title claims description 6
- 150000003839 salts Chemical class 0.000 title claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 101150104118 ANS1 gene Proteins 0.000 claims 1
- 101100510736 Actinidia chinensis var. chinensis LDOX gene Proteins 0.000 claims 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical class [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims 1
- 239000003518 caustics Substances 0.000 claims 1
- YAGKRVSRTSUGEY-UHFFFAOYSA-N ferricyanide Chemical compound [Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] YAGKRVSRTSUGEY-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 2
- NJYFRQQXXXRJHK-UHFFFAOYSA-N (4-aminophenyl) thiocyanate Chemical compound NC1=CC=C(SC#N)C=C1 NJYFRQQXXXRJHK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- -1 halogen silver compounds Chemical class 0.000 description 1
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 description 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229940100890 silver compound Drugs 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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
- G03C5/42—Reducing; Intensifying
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
Photographische Abschwächer, aus Blutlaugensalz und Rhodanammonium bestehend Unter den bekannten Abschwächern für photographische Platten ist auch ein solcher, aus rotem Blutlaugensalz und Rhodanammonium bestehend, vorgeschlagen bzw. benutzt worden. In dieser Form wirkt derselbe jedoch nicht gleichmäßig; auch ist de eintretende Blaufärbung lästig, obgleich ein solcher Abschwächer gegenüber dem gleichartigen Farmerschen Abschwächer den Vorteil größerer Haltbarkeit hat. Die vorbeschriebene Erfindung beseitigt die Mängel des vorbeschriebenen Rhodanammonium-Blutlaugensalz-Abschwächers durch Zusatz von Bromkali einerseits, wodurch eine regelmäßige Wirkung erzielt wird, und durch Zusatz von Ammoniak anderseits, wodurch die Blaufärbung vermieden wird. Bekanntlich ist Bromsilber in Rhodanammonium am stärksten löslich, erheblich mehr wie andere Halogensilberverbindungen oder Ferricyansilber. Der Zusatz von Bromkali bewirkt !eine sofortige Umsetzung des gebildeten Ferricyansalzes zu Bromsilber, dessen leichte Löslichkeit in Rhodanammonium alsdann zur geschilderten regelmäßigen Einwirkung des Abschwächers beihilft. Bekanntlich wirken Ferricyansalze aufeinander durch Bildung von Berlinerblau ein. Dies ist die Ursache, warum der vorbeschriebene Abschwächer bei der Benutzung bzw. längerem Stehen sich stark dunkel färbt und so das Arbeiten erschwert. Die vorliegende Erfindung vermeidet die Dunkelfärbung durch Zusatz von Ammoniak, wodurch anscheinend bewirkt wird, daß die Bildung von Berlinderblau vermieden wird. Jedenfalls bleibt der Abschwäch.er ungefärbt bzw. zeigt nur die bekannte gelbliche Rhodanfärbung. Der Zusatz von. Ammoniak hat aber weitere Vorteile, insbesondere den, daß durch ihn die Bildung von Blausäure bzw. Cyankali vermieden. wird. Dies tritt sonst bei dem erwähnten Abschwächer ein, wenn er längere Zeit steht, wodurch er -in Giftigkeit erheblich zunimmt und durch den bekannten Cyange.-ruch in. der Verarbeitung lästig fällt.Photographic attenuators, made from blood liquor salt and rhodanammonium Among the known attenuators for photographic plates is also such a solution, consisting of red blood liquor salt and rhodanammonium, has been proposed or been used. In this form, however, it does not work uniformly; even the blue discoloration which occurs is bothersome, although such a weakening effect is opposite the similar Farmer's attenuator has the advantage of greater durability. The above-described invention overcomes the shortcomings of the above-described rhodanammonium blood liquor salt attenuator by adding potassium bromide on the one hand, whereby a regular effect is achieved, and by adding ammonia on the other hand, which avoids the blue coloration. It is well known that silver bromide is most soluble in rhodanammonium, considerably more like other halogen silver compounds or ferricyanide silver. The addition of potassium bromide causes! an immediate conversion of the ferricyanide salt formed into bromide silver, its easy solubility in rhodanammonium then becomes the regular one described Action of the attenuator aids. It is well known that ferricyanide salts interact by forming Berlin blue. This is the reason why the above Attenuator when using or standing for a long time turns very dark and so on makes work difficult. The present invention avoids the darkening through Addition of ammonia, which apparently causes the formation of Berlinder blue is avoided. In any case, the attenuator remains uncolored or only shows the well-known yellowish rhodan color. The addition of. But ammonia has other advantages, in particular that it avoids the formation of hydrogen cyanide or potassium cyanide. will. Otherwise this occurs with the mentioned attenuator if it stands for a long time, as a result of which it increases considerably in toxicity and due to the well-known cyange smell in. processing is a nuisance.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH115294D DE465373C (en) | 1928-02-14 | 1928-02-15 | Photographic attenuators consisting of blood liquor salt and rhodanammonium |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH0115294 | 1928-02-14 | ||
| DEH115294D DE465373C (en) | 1928-02-14 | 1928-02-15 | Photographic attenuators consisting of blood liquor salt and rhodanammonium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE465373C true DE465373C (en) | 1928-09-15 |
Family
ID=25980889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEH115294D Expired DE465373C (en) | 1928-02-14 | 1928-02-15 | Photographic attenuators consisting of blood liquor salt and rhodanammonium |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE465373C (en) |
-
1928
- 1928-02-15 DE DEH115294D patent/DE465373C/en not_active Expired
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