PROCESS FOR PREPARING METAL SALTS, PHOTOGRAPHIC MATERIALS AND THEIR USE FOR THE PRODUCTION OF PHOTOGRAPHIC IMAGES

Metal salts which are sparingly soluble, in particular silver halides, are prepared by mixing at least one solution A which contains at least one cation of the metal salt, with at least one solution B which contains at least one anion of the metal salt, by running at least one of these solutions int...

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Bibliographic Details
Main Authors VON RINTELEN, HARALD, SALECK, WILHELM, TEITSCHEID, HEINZ
Format Patent
LanguageEnglish
French
Published 16.08.1983
Edition3
Subjects
AUXILIARY PROCESSES IN PHOTOGRAPHY
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
CINEMATOGRAPHY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
ELECTROGRAPHY
HOLOGRAPHY
INORGANIC CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PHYSICS
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:Metal salts which are sparingly soluble, in particular silver halides, are prepared by mixing at least one solution A which contains at least one cation of the metal salt, with at least one solution B which contains at least one anion of the metal salt, by running at least one of these solutions into a reaction vessel where solutions A and B are mixed, characterised in that this solution is run in for at least part of the precipitation process in such a way that the concentration of the inflowing solution continuously changes. The invention provides for a short precipitation time and makes it possible to work in concentrated solutions.
Bibliography:Application Number: CA19800352616