AT10540B - Process for the production of developers in solid form. - Google Patents
Process for the production of developers in solid form.Info
- Publication number
- AT10540B AT10540B AT10540DA AT10540B AT 10540 B AT10540 B AT 10540B AT 10540D A AT10540D A AT 10540DA AT 10540 B AT10540 B AT 10540B
- Authority
- AT
- Austria
- Prior art keywords
- developers
- solid form
- production
- parts
- sulfite
- Prior art date
Links
- 239000007787 solid Substances 0.000 title claims description 6
- 238000000034 method Methods 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims 1
- 239000003518 caustics Substances 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- JWDYCNIAQWPBHD-UHFFFAOYSA-N 1-(2-methylphenyl)glycerol Chemical compound CC1=CC=CC=C1OCC(O)CO JWDYCNIAQWPBHD-UHFFFAOYSA-N 0.000 description 1
- PLIKAWJENQZMHA-UHFFFAOYSA-N 4-aminophenol Chemical compound NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
<Desc/Clms Page number 1>
Österreichische PATENTSCHRIFT Nr. 1 0540. ACTIEN-GESELLSCHAFT FüR ANILIN-FABRIKATION iN BERLIN.
Verfahren zur Herstellung von Entwicklern in fester Form.
Bekanntlich eignen sich gewisse Dioxybenzole und Amidooxybenzole, sowie gewisse Substitutionsderivate dieser Produkte zum Entwickeln photographischer Bilder in Ag Cl-,
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gcdetnitc Anwendung. Man benutzt die Produkte dabei in wässeriger Lösung bei Gegenwart von kohlensauren oder fixen Alkalien und Sultit. Wenn auch mittelst einzelner Produkte der genannten Körperklasse sich haltbare konzentrierte Lösungen herstellen lassen (Rodinal), so ist doch über gebrauchsfähige feste Entwickler, welche die sämtlichen zum Entwickeln erforderlichen Ingredienzien enthalten und daher ohneweiteres verwendet werden können, bis jetzt nichts bekannt geworden.
Es hat sich nun gezeigt, dass man derartige gebrauchs-
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fein verteiltem entwässertem Alkalisulfit gemengt, und andererseits so viel fixes Alkali in fester Form zugesetzt wird, dass die Pbenolatbildung stattfinden kann. Die so hergestellten Entwickler verdienen deshatb ein besonderes Interesse, weil sie den unmittelbar verwend- baren Entwickler in der konzentrirtosten Form repräsentieren und daher eine geringe Menge solcher fester Entwicklersubstanz für längere Zeit ausreicht. Ausserdem fallen die Ubolstände weg, die mit der Anwendung konzentrierter wasseriger Entwicklel'iisungen unter
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wie vorstehend beschrieben, erhält, man einen gebrauchsfertigen Entwickler aus 5 Teilen Hydrochinon bezw.
Brenzcatechin, 2.') Teilen Sulfit und 4-5 Teilen Ätznatron. IV. 10 Teile Ortol. 50 Teile Sulfit und 7#4 Teile Ätznatron ergeben nach dem vorliegenden Verfahren
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dem oben stehenden Beispiel 1I an Stelle des Ätznatrons calc. Soda verwendet wird. Man gibt daher der Anwendung von fixen Alkalien den Vorzug, nicht nur, weil die gebrauchsfertigen Entwickler dabei in konzentrierterer Form erhalten werden, sondern weil sich auch
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haltbarer sind.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Austrian PATENT NO. 1 0540. ACTIEN-GESELLSCHAFT FOR ANILINE FABRICATION IN BERLIN.
Process for the production of developers in solid form.
It is known that certain dioxybenzenes and amidooxybenzenes, as well as certain substitution derivatives of these products, are suitable for developing photographic images in Ag Cl-,
EMI1.1
gcdetnitc application. The products are used in an aqueous solution in the presence of carbonic or fixed alkalis and sultitol. Even if long-lasting, concentrated solutions can be produced by means of individual products of the body class mentioned (Rodinal), nothing has yet become known about usable solid developers, which contain all the ingredients necessary for development and can therefore be used without further ado.
It has now been shown that such usable
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finely divided dehydrated alkali sulfite, and on the other hand so much fixed alkali is added in solid form that the Pbenolatbildung can take place. The developers produced in this way deserve special interest because they represent the developer that can be used immediately in the most concentrated form and therefore a small amount of such solid developer substance is sufficient for a long time. In addition, there is no need for the volatility associated with the use of concentrated aqueous developments
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as described above, you get a ready-to-use developer from 5 parts of hydroquinone BEZW.
Catechol, 2. ') parts sulfite and 4-5 parts caustic soda. IV. 10 parts of Ortol. 50 parts of sulfite and 7 # 4 parts of caustic soda result in the instant process
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the above example 1I instead of the caustic soda calc. Soda is used. The use of fixed alkalis is therefore preferred, not only because the ready-to-use developers are obtained in a more concentrated form, but because they are also
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are more durable.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1901129587D DE129587C (en) | 1901-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT10540B true AT10540B (en) | 1903-01-26 |
Family
ID=5663153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT10540D AT10540B (en) | 1901-06-10 | 1902-03-08 | Process for the production of developers in solid form. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT10540B (en) |
-
1902
- 1902-03-08 AT AT10540D patent/AT10540B/en active
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