VERFAHREN ZUR HERSTELLUNG VON PHOTOGRAPHISCHEN GELATINE-SILBERHALOGENIDEMULSIONEN

A method is disclosed of preparing washed chemically sensitized silver halide emulsions according to which washing occurs by coagulation based on the use of acid-coagulable gelatin derivatives, wherein between coagulation washing and chemical sensitization the pH of the emulsion is raised to a value...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	FLORENS, RAYMOND LEOPOLD., EDEGEM, (BELGIEN)
Format:	Patent
Sprache:	ger
Schlagworte:	AUXILIARY PROCESSES IN PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS
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Beschreibung
Zusammenfassung:	A method is disclosed of preparing washed chemically sensitized silver halide emulsions according to which washing occurs by coagulation based on the use of acid-coagulable gelatin derivatives, wherein between coagulation washing and chemical sensitization the pH of the emulsion is raised to a value above 8. By this pH raise it is possible to increase the speed, gradation and maximum density.