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
Application number
Other languages
German (de)
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date 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 date listed.)
Publication date
Application granted granted Critical
Publication of AT160530B publication Critical patent/AT160530B/en

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  • 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)

2. Anwendung des Verfahrens nach Anspruch 1 zur Umkehrentwic1dung von Farbstoffbildner enthaltenden Halogensilberemulsionssehichten, die gegebenenfalls auf einer oder beiden Seiten eines Schichtträgers angeordnet sein können. 2. Use of the method according to claim 1 for the reverse development of halogen silver emulsion layers containing dye formers, which optionally can be arranged on one or both sides of a layer support.
AT160530D 1936-11-10 Process for the reverse development of photosensitive halide silver emulsion layers without intermediate exposure. AT160530B (en)

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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