Color photographic element containing elemental silver and heterocyclic thiol in a non-light sensitive layer
AssigneeEastman Kodak Company
InventorsPaul A. Burns, Louis E. Friedrich, Stephen P. Singer, J. R. Vargas
Life of this patent
Estimating the term…
Abstract
Disclosed is a photographic element comprising a non-light sensitive layer containing elemental silver and a heterocyclic thiol compound having a Clog P of at least 2.0 but less than 12.0, provided that the ring system of the compound comprises a --N.dbd.C--S--H group or its tautomer and does not react with an oxidized developer. The invention provides improved minimum densities in imaging layers.
Claims17
A color photographic element comprising at least one red sensitive silver halide emulsion layer containing at least one cyan coupler, at least one green sensitive silver halide emulsion layer having at least one magenta coupler, and at least one blue sensitive silver halide emulsion layer having at least one yellow coupler and a non-light sensitive layer containing elemental silver and a heterocyclic thiol compound having a Clog P of at least 2.0 but less than 12.0, provided that the ring system of the compound comprises a --N.dbd.C--S--H group or its tautomer and does not react with an oxidized developer, and provided that the heterocyclic thiol compound is present as a dispersion in a hydrophobic organic solvent.
Dependencies are inferred from the claim text.