Three-part concentrated photographic color developing kit and methods of use

A three-part color developing kit includes (I) a first concentrated aqueous solution having a pH of from 11 to 13.5 and comprising at least 0.25 mol/l of sulfite ions, at least 2.5 x 10 mol/l of iodide ions, at least 0.05 mol/l of bromide ions, and at least 0.5 mol/l of a buffer having a pKa of from...

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Bibliographische Detailangaben
Hauptverfasser:	HAYE, SHIRLEYANNE ELIZABETH, HUSTON, JANET MARIE
Format:	Patent
Sprache:	eng ; fre ; 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 three-part color developing kit includes (I) a first concentrated aqueous solution having a pH of from 11 to 13.5 and comprising at least 0.25 mol/l of sulfite ions, at least 2.5 x 10 mol/l of iodide ions, at least 0.05 mol/l of bromide ions, and at least 0.5 mol/l of a buffer having a pKa of from 11 to 13.5, (II) a second concentrated aqueous solution having a pH of from 3 to 6 and comprising at least 1 g/l of a vinyl pyrrolidone polymer, and at least 0.05 mol/l of an organic antioxidant, and a third concentrated aqueous solution having a pH of from 1 to 3 and comprising at least 0.05 mol/l of a color developing agent, and at least 0.005 mol/l of sulfite ions.