Gelatin hardening method and photographic materials prepared with the aid thereof

Gelatin hardening method and photographic materials prepared with the aid thereof

At least some of the secondary alcohol groups of polysaccharides having pyranose units are oxidized to aldehyde groups for example by means of solutions of water-soluble salts of periodic acid, said polysaccharides being alginic acid, sodium alginate, gum arabic, xylan or pectic acid.ALSO:Gelatin is...

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Bibliographische Detailangaben
Hauptverfasser: VRANCKEN MARCEL NICOLAS, LEMMERLING JOSE THERESE
Format: Patent
Sprache:eng
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:At least some of the secondary alcohol groups of polysaccharides having pyranose units are oxidized to aldehyde groups for example by means of solutions of water-soluble salts of periodic acid, said polysaccharides being alginic acid, sodium alginate, gum arabic, xylan or pectic acid.ALSO:Gelatin is hardened by means of a polysaccharide comprising pyranose units in which some of the secondary alcohol groups have been oxidized to aldehyde groups, said polysaccharide being alginic or pectic acid or a salt thereof, gum arabic or xylan.