AT160530B - Process for the reverse development of photosensitive halide silver emulsion layers without intermediate exposure. - Google Patents
Process for the reverse development of photosensitive halide silver emulsion layers without intermediate exposure.Info
- Publication number
- AT160530B AT160530B AT160530DA AT160530B AT 160530 B AT160530 B AT 160530B AT 160530D A AT160530D A AT 160530DA AT 160530 B AT160530 B AT 160530B
- Authority
- AT
- Austria
- Prior art keywords
- emulsion layers
- silver emulsion
- reverse development
- intermediate exposure
- halide silver
- Prior art date
Links
Landscapes
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Umkehrentwicklung lichtempfindlicher Halogensilberemulsionsschichten ohne
Zwischenbelichtung.
EMI1.1
<Desc/Clms Page number 2>
einem sauren Bad einer Silberkeime erzeugenden geruchlosen Schwefelverbindung behandelt und darauf in einem Farbentwickler zum Positiv entwickelt. So können nach dem vorliegenden Verfahren
EMI2.1
entwickelt werden.
Beispiel : Ein mehrschichtiges photographisches Erzeugnis, dessen Schichten diffusionsechte Farbstoffkomponenten, enthalten, wird nach der Belichtung zunächst in einem der üblichen Negativentwiekler, wie beispielsweise Entwickler, die unter dem geschützten Namen"Amidol"oder "Metol"bekannt sind, entwickelt und gelangt dann in ein Zwischenbad aus 1000 cm3 Wasser, 5 cm3 Eisessig und 0. 4 g Thiosinamin. Darauf wird mit einem Farbentwickler, wie N, N-Diäthyl-pphenylendiamin, entwickelt, gewaschen, mit dem Farmerschen Abschwächer das Silberbild herausgelöst und wiederum gewaschen.
PATENT-ANSPRÜCHE :
1. Verfahren zur-Umkehrentwieldung lichtempfindlicher Halogensilberemulsionsschichten, wobei die zweite Entwicklung nach Erzeugung von Entwicklungskeimen durch geruchlos organisehe Schwefelverbindungen erfolgt, dadurch gekennzeichnet, dass diese Schwefelverbindungen in saurer Lösung verwendet werden.
<Desc / Clms Page number 1>
Process for the reverse development of photosensitive halogen silver emulsion layers without
Intermediate exposure.
EMI1.1
<Desc / Clms Page number 2>
treated with an acidic bath of an odorless sulfur compound producing silver nuclei and then developed to positive in a color developer. So can according to the present process
EMI2.1
be developed.
Example: A multilayer photographic product, the layers of which contain non-diffusible dye components, is first developed after exposure in one of the usual negative developers, such as developers, which are known under the protected names "Amidol" or "Metol", and then enters a Intermediate bath of 1000 cm3 water, 5 cm3 glacial acetic acid and 0.4 g thiosinamine. This is followed by developing with a color developer such as N, N-diethyl-pphenylenediamine, washing, removing the silver image with the Farmer's reducer and washing again.
PATENT CLAIMS:
1. Process for reverse development of light-sensitive halogen silver emulsion layers, the second development taking place after development nuclei have been generated by odorless organic sulfur compounds, characterized in that these sulfur compounds are used in acidic solution.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE160530T | 1936-11-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT160530B true AT160530B (en) | 1941-07-10 |
Family
ID=29413211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT160530D AT160530B (en) | 1936-11-10 | Process for the reverse development of photosensitive halide silver emulsion layers without intermediate exposure. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT160530B (en) |
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0
- AT AT160530D patent/AT160530B/en active
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