| abstract |
In accordance with this invention a heat-developable photographic color diffusion transfer element is provided, where this element comprises a dimensionally stable support and one or more layers comprising radiation sensitive silver halide, an organic silver salt oxidizing agent, a reducing agent, a methine-dye releasing compound, and a binder, wherein said methine-dye is heat diffusible in said element, and wherein said methine-dye releasing compound is of the structure Cp-L-M (I) where Cp is a coupler radical substituted in the coupling position with a divalent linking group, L; M is a methine-dye radical exhibiting selective absorption in the visible spectrum; and where the -L-M group couples off upon reaction of said coupler radical with the oxidation product of a primary amine developing agent, and where said methine-dye radical M is released from said -L-M group subsequent to the coupling off of said -L-M group. |