Color photographic material with homophthalimide thioether development inhibitor
AssigneeAgfa-Gevaert
InventorsHeinrich Odenwalder, Erwin Ranz, Walter Puschel, Hans Vetter
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Abstract
A color photographic material having a silver halide emulsion layer and containing a thioether compound which is reactable on chromogenic development thereby releasing a diffusible substance which inhibits the development of the silver halide. The thioether compound is a homophthalimide containing a removable mercapto group containing moiety in the 4-position and its nitrogen in the 2-position atom being a tertiary nitrogen.
Claims6
A light-sensitive color photographic material with at least one silver halide emulsion layer, containing at least one dye image producing compound and containing a development inhibitor releasing homophthalimide thioether compound capable of reacting with the oxidation product of an aromatic primary amino silver halide developing agent to form a releasable mercaptan capable of inhibiting photographic development the said homophthalimide thioether compounds are substituted with the sulfur of the thioether group in the 4-position and the nitrogen atom of the imido group in the 2-position of the homophthalimide is a tertiary nitrogen atom substituted with an alkyl, aryl, heterocyclic or an acylamino group.
Dependencies are inferred from the claim text.