AT94344B - Photographic developer. - Google Patents
Photographic developer.Info
- Publication number
- AT94344B AT94344B AT94344DA AT94344B AT 94344 B AT94344 B AT 94344B AT 94344D A AT94344D A AT 94344DA AT 94344 B AT94344 B AT 94344B
- Authority
- AT
- Austria
- Prior art keywords
- photographic developer
- developer
- development
- solution
- working
- Prior art date
Links
- 238000000034 method Methods 0.000 claims 1
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000011550 stock solution Substances 0.000 description 3
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
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Photo graphischer Entwickler.
EMI1.1
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lösung eine schwarze bis braune Farbe, was namentlich für Diapositive und Gaslichtaufnahmen eine besonders geschätzte Eigenschaft ist. Die neuen Entwickler lassen sich durch Zusatz von Bromkalium in weitgehender Weise abstimmen. Sie färben die Hände nicht, zeigen alle Vorteile des so beliebten Pyrogallolentwicklers ohne seine Nachteile und verdienen so mit Recht die Bezeichnung von Universalentwickler.
Beispiele :
Man stellt sich eine doppelt bis dreifach konzentrierte Vorratslösung von salzsaurer Amidosalizylsäure nach folgenden Mengenverhältnissen her :
Salzsaure Paramidosalizylsäure. ...................... 100 g,
Sulfit, wasserfrei ..................... 500 g, Fünffache Normallauge ....................... 210 cm3,
Wasser 4790 em3 und erhält auf diese Weise 5-1 einer unbegrenzt haltbaren Vorratslösung (L). Zur Entwicklung wird diese Vorratslosung (L) mit dem gleichen bis doppelten Volumen Wasser verdünnt und je nach Bedarf
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3. Für normale Belichtung, rasch arbeitend :
L. 50 ems ; aq 50 cm3 @ I/n Na O H 7 cm3.
4. Für knappe Belichtung, ranch arbeitend :
L. 50 ems ; aq 50 cm3; I/n Na O H 8 cm3.
5. Für Vergrösserungen, normal arbeitend :
L. 50 em3 @ aq 50 cm3 ; I/n Na 0 H 10 cm".
6. Für Vergrösserungen, rasch arbeitend :
L. 50 cm3; aq 50 cm3 ; I/n Na 0 H 12 ern3.
Je nach Bedarf können die Mengenverhältnisse noch weiter geändert und besonderen Zwecken angepasst werden. So erhält man bei stärkerer Verdünnung langsamere Entwicklung und braune Töne.
Da sich bei öfterer Entwicklung die Lauge durch allmähliche Neutralisierung in ihrer Wirkung erschöpft, so muss sie von Zeit ZU Zeit erneuert zugesetzt werden, wodurch die Entwicklungslösung wieder ihre alte Kraft erhält.
PATENT-ANSPRÜCHE :
1. Verwendung der-Alkalisalze von Para- und Orthoamidosalizylsäure sowie von Ortho-paraDiamidosalizylsäuren als photographische Entwickler in ätzalkalischer Lösung.
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Photo graphic developer.
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solution has a black to brown color, which is a particularly valued property for slides and gas light recordings. The new developers can be largely adjusted by adding potassium bromide. They do not stain the hands, show all the advantages of the popular pyrogallol developer without its disadvantages and thus rightly deserve the name of universal developer.
Examples:
A double to triple concentrated stock solution of hydrochloric acid amidosalicylic acid is prepared in the following proportions:
Hydrochloric acid paramidosalicylic acid. ...................... 100 g,
Sulphite, anhydrous ..................... 500 g, five times normal liquor ..................... .. 210 cm3,
Water 4790 em3 and in this way receives 5-1 of an indefinitely stable stock solution (L). For development, this stock solution (L) is diluted with the same to twice the volume of water and as required
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3. For normal exposure, working quickly:
L. 50 ems; aq 50 cm3 @ I / n Na O H 7 cm3.
4. For tight exposure, working ranch:
L. 50 ems; aq 50 cm3; I / n Na O H 8 cm3.
5. For enlargements, working normally:
L. 50 em3 @ aq 50 cm3; I / n Na 0 H 10 cm ".
6. For enlargements, working quickly:
L. 50 cm3; aq 50 cm3; I / n Na 0 H 12 ern3.
Depending on requirements, the proportions can be changed even further and adapted to special purposes. With more dilution, you get slower development and brown tones.
Since the lye is exhausted in its effect through gradual neutralization with frequent development, it must be renewed from time to time, whereby the development solution regains its old strength.
PATENT CLAIMS:
1. Use of the alkali salts of para- and ortho-amido-salicylic acid and of ortho-para-diamidosalicylic acids as photographic developers in a caustic solution.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT94345D AT94345B (en) | 1918-12-09 | 1922-09-22 | Photographic developer. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE94344X | 1918-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT94344B true AT94344B (en) | 1923-09-25 |
Family
ID=5645048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT94344D AT94344B (en) | 1918-10-23 | 1920-10-14 | Photographic developer. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT94344B (en) |
-
1920
- 1920-10-14 AT AT94344D patent/AT94344B/en active
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