Photographic silver halide color materials
AssigneeEastman Kodak Company
InventorsDavid Clarke, Paul L. Stanley
Life of this patent
Estimating the term…
Loading patent…
AssigneeEastman Kodak Company
InventorsDavid Clarke, Paul L. Stanley
Estimating the term…
A method of forming a photographic colour image which comprises imagewise exposing a photographic silver halide colour material and processing it with an alkaline developer solution in the presence of a sulphonhydrazide developer and a heteroarylacetonitrile colour coupler thus forming a dye image by reaction of oxidised colour developing agent and the colour coupler. A colour photographic material is also provided having at least two colour-forming units sensitive to different regions of the spectrum, each having a silver halide emulsion layer, characterised in that the material contains in or adjacent said layer, a ballasted photographic colour coupler and a ballasted sulphonhydrazide colour developing agent incorporated therein in droplets of a high boiling solvent and in which the colour coupler is a heteroarylacetonitrile.
A method of forming a photographic colour image which comprises imagewise exposing a photographic silver halide colour material and processing it with an alkaline developer solution in the presence of a sulphonhydrazide developer and a heteroarylacetonitrile colour coupler thus forming a dye image by reaction of oxidised sulphonhvdrazide developer and the colour coupler, the heteroarylacetonitrile colour coupler having the general formula:
A colour photographic material comprising at least two colour-forming units sensitive to different regions of the spectrum each comprising a silver halide emulsion layer characterised in that the material contains in or adjacent said layer, a ballasted photographic colour coupler and a ballasted sulphonhydrazide colour developing agent incorporated therein in droplets of a high boiling solvent and wherein the colour coupler is a heteroarylacetonitrile of the general formula (2) below, such that upon imagewise exposure of the material and processing of the element in an alkaline solution a dye image is formed by reaction of the oxidised suphonhydrazide developing agent and the colour coupler:
Dependencies are inferred from the claim text.