Thermal solvents for dye diffusion in image separation systems

摘要

A photographic chromogenic and substantially dry dye-diffusion-transfer element is disclosed, wherein said element is activated by heat and comprises contacting dye-receiver and dye-donor layers and further comprises a layer which contains a thermal solvent according to formula (I) wherein Z1, Z2, Z3, Z4, and Z5 are substituents, the Hammet sigma parameters of Z2, Z3, and Z4 sum to at least -0.28 and less than 1.53; the calculated logP for I is greater than 3 and less than 10.