DE101640C - - Google Patents
Info
- Publication number
- DE101640C DE101640C DENDAT101640D DE101640DC DE101640C DE 101640 C DE101640 C DE 101640C DE NDAT101640 D DENDAT101640 D DE NDAT101640D DE 101640D C DE101640D C DE 101640DC DE 101640 C DE101640 C DE 101640C
- Authority
- DE
- Germany
- Prior art keywords
- oxidation
- emulsion
- substance
- added
- sodium
- 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.)
- Active
Links
- 239000000839 emulsion Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- WQGWDDDVZFFDIG-UHFFFAOYSA-N Pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 claims description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-L Sulphite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229940079877 Pyrogallol Drugs 0.000 claims description 2
- -1 silver halide Chemical class 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L Sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 235000010265 sodium sulphite Nutrition 0.000 description 3
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N benzohydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- DHMQDGOQFOQNFH-UHFFFAOYSA-N glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N sulfonic acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- PLIKAWJENQZMHA-UHFFFAOYSA-N 4-Aminophenol Chemical compound NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-M Sodium 2-anthraquinonesulfonate Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)[O-])=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-M 0.000 description 1
- UKTDQTGMXUHPIF-UHFFFAOYSA-N [Na].S(O)(O)=O Chemical compound [Na].S(O)(O)=O UKTDQTGMXUHPIF-UHFFFAOYSA-N 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Landscapes
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
KLASSE 57: Photographs. 'CLASS 57: Photographs. '
MAX PETZOLD in CHEMNITZ.MAX PETZOLD in CHEMNITZ.
Patentirt im Deutschen Reiche vom 15. Juni 1898 ab.Patented in the German Empire on June 15, 1898.
Es sind bereits früher Trockenplatten bekannt geworden, welche durch einfaches Baden in alkalischen Lösungen entwickelt wurden. Diese Platten waren in der Weise hergestellt worden, dafs der gufsfertigen Emulsion Entwicklersubstanzen, wie z. B. Pyrogallol, zugesetzt wurden.Drying plates have already become known earlier, which can be obtained by simply bathing in alkaline solutions were developed. These plates were made in the manner that the ready-to-use emulsion contains developer substances, such as B. pyrogallol added became.
Um deren Oxydation zu vermeiden, wurde gleichzeitiger Zusatz von Natriumsulfit vorgeschlagen, doch scheiterte das Verfahren daran, dafs dieses Salz schon unter gewöhnlichen Umständen sehr energisch dem Oxydiren ausgesetzt ist, d. h. sehr leicht zersetzlich ist (s. Photogr. Wochenblatt 1885, S. 327, Spalte 1 unten).In order to avoid their oxidation, the simultaneous addition of sodium sulphite was suggested. but the process failed because this salt was very vigorously exposed to oxidation under ordinary circumstances is, d. H. is very easily decomposed (see Photogr. Wochenblatt 1885, p. 327, column 1 below).
Würde nun diese leichte Oxydation des Natriumsulfits vermieden werden können, so wäre damit auch die Oxydation der Entwicklersubstanz in der Emulsion vermieden. If this slight oxidation of the sodium sulfite could now be avoided, so This would also avoid the oxidation of the developer substance in the emulsion.
Sehr leicht erreicht man dies, wenn man an Stelle des Natriumsulfits Bisulfite verwendet, welche sehr wenig beständig sind und in Sulfite und schweflige Säure zerfallen. Die dabei frei werdende schweflige Säure verhindert die Oxydation des entstehenden Sulfits und der Entwicklungssubstanz zugleich, wodurch andererseits das Silbersalz in der Emulsion vor Reduction bewahrt wird.This can be achieved very easily if bisulfite is used instead of sodium sulfite, which are very little stable and decompose into sulphites and sulphurous acid. The free the sulphurous acid which is produced prevents the oxidation of the sulphite and the Development substance at the same time, whereby on the other hand the silver salt is present in the emulsion Reduction is preserved.
Hierauf gründet sich das vorliegende Verfahren zur Herstellung solcher Emulsionen.The present process for the preparation of such emulsions is based on this.
Für die praktische Ausführung wird folgendes Beispiel vorgeführt.The following example is shown for practical implementation.
Zu 10 1 gufsfertiger Emulsion füge man 300 g Entwicklungssubstanz, z. B. Hydrochinon, Pyrogallussäure, Eikonogen, Paramidophenol, Glycin oder sonst einer für Photographie verwendeten Reductionssubstanz, welche ihrerseits zu 15 pCt. ihres Gewichtes z. B. mit saurem schwefligsaurem Kalium- oder Natrium versetzt ist, vergiefse und lasse trocknen.To 10 l of ready-to-use emulsion add 300 g of developing substance, e.g. B. hydroquinone, Pyrogallic acid, eikonogen, paramidophenol, glycine or any other used for photography Reduction substance, which in turn amounts to 15 pCt. their weight z. B. with sour If potassium or sodium sulphurous acid has been added, cast and let dry.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE101640C true DE101640C (en) |
Family
ID=372324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT101640D Active DE101640C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE101640C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE743624C (en) * | 1941-12-11 | 1943-12-30 | Ig Farbenindustrie Ag | Method for producing a washout relief |
| DE973818C (en) * | 1953-07-18 | 1960-06-15 | Leonar Werke Ag | Process for the production of photographic images by simultaneously developing and fixing or stabilizing exposed halide silver layers by means of a developer substance and a fixing or stabilizing agent and optionally an alkali sulfite and / or an alkali-containing solution |
| DE1167650B (en) * | 1960-08-22 | 1964-04-09 | Polaroid Corp | Multilayer photographic material suitable for multicolor diffusion processes with developer substances in the emulsion layer |
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0
- DE DENDAT101640D patent/DE101640C/de active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE743624C (en) * | 1941-12-11 | 1943-12-30 | Ig Farbenindustrie Ag | Method for producing a washout relief |
| DE973818C (en) * | 1953-07-18 | 1960-06-15 | Leonar Werke Ag | Process for the production of photographic images by simultaneously developing and fixing or stabilizing exposed halide silver layers by means of a developer substance and a fixing or stabilizing agent and optionally an alkali sulfite and / or an alkali-containing solution |
| DE1167650B (en) * | 1960-08-22 | 1964-04-09 | Polaroid Corp | Multilayer photographic material suitable for multicolor diffusion processes with developer substances in the emulsion layer |
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