Method for developing photographic materials
Abstract
Abstract PHOTOGRAPHIC DEVELOPING METHODS ARE DESCRIBED WHEREIN AN EXPOSED SILVER HALIDE EMULSION LAYER OF A PHOTOGRAPHIC MATERIAL IS DEVELOPED WITH AN AQUEOUS ALKALINE COMPOSITION IN THE PRESENCE OF A N,N-DIALKYLHYDROXYLAMINE DEVELOPING AGENT AND A QUATERNARY AMMONIUM COMPOUND HAVING THE FORMULA $-(CH2)2-(OCH2CH2)N-1-R$X- WHEREIN $ STANDS FOR A QUATERNARY AMMONIUM GROUP EITHER CYCLIC OR ACYCLIC, R STANDS FOR AN ALKYL GROUP CONPRISING FROM 7 TO 20 CATOMS OR FOR THE GROUP Q(+)-(CH2)X-(O-(CH2)2)(N-1)-R X(-) X- IS AN ANION N STANDS FOR AN INTEGER FROM 1 TO 250, N BEING AT LEAST 2 WHEN R STANDS FOR ALKYL, AND X STANDS FOR 2 WHEN N IS DIFFERENT FROM U AND FOR AN INTERGER FROM 2 TO 16 WHEN N=1. THE DEVELOPMENT IS ACCELERATED WITHOUT ADVERSE EFFECTS.
Inventors
- 👤 Jozef Frans Willems
Bibliographic Details
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