AT87809B - Process for making photographic images with yellow arsenic. - Google Patents
Process for making photographic images with yellow arsenic.Info
- Publication number
- AT87809B AT87809B AT87809DA AT87809B AT 87809 B AT87809 B AT 87809B AT 87809D A AT87809D A AT 87809DA AT 87809 B AT87809 B AT 87809B
- Authority
- AT
- Austria
- Prior art keywords
- yellow
- arsenic
- photographic images
- making photographic
- yellow arsenic
- Prior art date
Links
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 5
- 229910052785 arsenic Inorganic materials 0.000 title description 10
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 9
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 150000003378 silver Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 206010034960 Photophobia Diseases 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000010685 fatty oil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- -1 silver halides Chemical class 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Silicon Compounds (AREA)
Description
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Verfahren zur Herstellung photographischer Bilder mit gelbem Arsen.
Die Erfindung beruht auf der bekannten Lichtempfindlichkeit der gelben Modifikation des Arsenmetalls und kennzeichnet sich durch die Verwendung dieses Stoffes zur Herstellung von Lichtbildern.
Nebst der grossen Lichtempfindlichkeit der Silbersalze zeigt das gelbe Arsen diese Eigen- schaft in hervorragendem Masse. Dasselbe erreicht zwar die Sensibilität der Silberhalogenide nicht, ist aber so beträchtlich, dass selbst im gelben Lichte, gegen das die Silbersalze ziemlich beständig sind, die Umwandlung in das gewöhnliche "Schwarze Arsen" in wenigen Minuten erfolgt.
Die Eigenschaften des gelben Arsens wurden von mehreren Forschern angegeben. So haben Erdmann und Unruh eine gute Herstellungsweise eingeführt, die sich auch im grossen
Massstabe verwirklichen lässt.
Das reine Arsenmetall wird aus Aluminiumgefässen im Kohlendioxydgasstrom herausdestilliert und der Dampf bei plötzlicher Abschreckung durch stark gekühlte Kohlensäure in Schwefelkohlenstoff geleitet. In demselben löst es sich dabei auf.
Nach den Angaben von Stock und Siebert wird es hergestellt, indem man eine Kathode, bestehend aus gleichen Teilen Arsen und Antimon unter Lichtabschluss (rotes Licht) sowie Verwendung von Kohle als Anode in einer mit Kohlenstoffdisulfid gefüllten Schale, die mit Eis gekühlt wird, zerstäubt. Dabei werden IIO Volt Stromspannung verwendet.
Die Kristalle sind optisch isotrop. Die Lösungen des gelben Arsens können konzentriert und gekocht werden, ohne dass Zersetzung eintritt.
Direktes Sonnenlicht bewirkt die Umwandlung in die schwarze Modifikation in weniger als einer Minute. Das gelbe Arsen nach Stock und Siebert ist noch mehr lichtempfindlich als das von Erdmann, da es feiner kristallisiert. Im Acetylen-und Magnesiumlicht ist die Einwirkung langsamer, noch mehr im Auergaslicht. Photographische Lampen mit gelben Scheiben bewirken die Umwandlung in fünf bis sechs Minuten. Die Temperatursverhältnisse sind dabei gleichbleibend. Im Spektrum beginnt die Zersetzung zuerst im ultravioletten Teile und setzt sich nach dem gelben fort. Die Lösungen sind im Dunkeln lange haltbar. In Berührung mit Metallen zer- setzen sie sich bald.
Gelbes Arsen löst sich leicht in Schwefelkohlenstoff weniger in Benzol, in Glycerin, fetten Ölen usw.
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Glasplatten oder Papier aufgetragen und im trockenen Zustand in der Kamera belichtet, so entsteht ein sofort sichtbares negatives Bild. Die Entwicklung und Fixierung geschieht durch ein Benzolbad, welches das noch unzersetzte gelbe Arsen vollständig auflöst. Hierauf wird in bekannter Art kopiert und das Fixieren wiederholt. Sensibilatoren, wie Eosin, beschleunigen die Zersetzung sehr.
Ein solches photographisches Verfahren würde sich besonders bei Sonnenlandschaften, stark belichteter Gegenstände eignen und wäre durch seine Einfachheit zweckmässig. Auch für Lichtpauseverfahren wäre es sehr anwendbar.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for making photographic images with yellow arsenic.
The invention is based on the known photosensitivity of the yellow modification of the arsenic metal and is characterized by the use of this substance for the production of photographs.
In addition to the great light sensitivity of the silver salts, the yellow arsenic shows this property to an excellent degree. Although the same does not reach the sensitivity of the silver halides, it is so considerable that even in the yellow light, against which the silver salts are fairly resistant, the conversion into the usual "black arsenic" takes place in a few minutes.
The properties of yellow arsenic have been given by several researchers. So Erdmann and Unruh have introduced a good production method, which also applies to the large
Realizing standards.
The pure arsenic metal is distilled out of aluminum vessels in a stream of carbon dioxide gas and, when suddenly quenched, the steam is led into carbon disulfide by strongly cooled carbon dioxide. It dissolves in the same.
According to Stock and Siebert, it is produced by atomizing a cathode consisting of equal parts of arsenic and antimony in the dark (red light) and using carbon as the anode in a bowl filled with carbon disulfide that is cooled with ice. Here, IIO volts are used.
The crystals are optically isotropic. The yellow arsenic solutions can be concentrated and boiled without decomposition occurring.
Direct sunlight causes the conversion to the black modification in less than a minute. The yellow arsenic according to Stock and Siebert is even more sensitive to light than that of Erdmann, since it crystallizes more finely. The action is slower in acetylene and magnesium light, even more so in Auergas light. Photographic lamps with yellow disks effect the conversion in five to six minutes. The temperature conditions are constant. In the spectrum, the decomposition begins first in the ultraviolet part and continues after the yellow. The solutions have a long shelf life in the dark. They soon decompose in contact with metals.
Yellow arsenic dissolves easily in carbon disulfide less in benzene, glycerin, fatty oils, etc.
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When applied to glass plates or paper and exposed in the camera when dry, an immediately visible negative image is created. A benzene bath is used for development and fixation, which completely dissolves the yellow arsenic, which has not yet been decomposed. It is then copied in the known manner and the fixing is repeated. Sensitizers, like eosin, greatly accelerate the decomposition.
Such a photographic process would be particularly suitable for sunny landscapes, strongly exposed objects and would be expedient due to its simplicity. It would also be very applicable for blueprint procedures.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87809T | 1920-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT87809B true AT87809B (en) | 1922-03-27 |
Family
ID=3608455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT87809D AT87809B (en) | 1920-09-20 | 1920-09-20 | Process for making photographic images with yellow arsenic. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT87809B (en) |
-
1920
- 1920-09-20 AT AT87809D patent/AT87809B/en active
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