Method of forming a photographic colour image.

摘要

Method of forming a photographic colour image which comprises imagewise exposing a photographic silver halide colour material and processing it with an alkaline processing solution in the presence of a sulphonhydrazide colour developing agent and a 3-pyridinol colour coupler optionally containing in the 2-position a ballasting group of such size and configuration as to render the coupler non-diffusible in photographic materials thus forming a dye image by reaction of the oxidised colour developing agent and the colour coupler.