Photographic proteinaceous layers comprising dextran derivatives
AssigneeAgfa-Gevaert
InventorsJoan T. Vermeersch, Daniel Timmerman, Hubert Vandenabeele, Jacques L. Vervecken
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Abstract
The present invention provides a method of hardening a proteinaceous layer of a photographic silver halide element by incorporating a modified dextran in said proteinaceous layer, said modified dextran being the reaction product of dextran and an alkyl haloformate, a substituted alkyl haloformate, an aryl haloformate, or a substituted aryl haloformate. The invention also provides a photographic element comprising a said reaction product in at least one proteinaceous silver halide emulsion layer and/or in another proteinaceous layer coated thereon.
Claims12
Method of hardening a proteinaceous layer of a photographic silver halide element by incorporating a modified dextran in said proteinaceous layer, wherein said modified dextran is a reaction product of dextran and at least one reagent selected from the group consisting of an alkyl haloformate, a substituted alkyl haloformate, an aryl haloformate, and a substituted aryl haloformate.
Photographic element comprising in at least one proteinaceous silver halide emulsion layer and/or in another proteinaceous layer coated thereon a modified dextran, wherein said modified dextran is a reaction product of dextran and at least one reagent selected from the group consisting of an alkyl haloformate, a substituted alkyl haloformate, an aryl haloformate, and a substituted aryl haloformate.
Dependencies are inferred from the claim text.