A Kinetic Model of Dye Formation in Colour Photographic Systems Containing Incorporated Couplers

Abstract

A model of dye formation in colour photographic systems based on the competitionl kinetics in oxidative coupling chemistry is presented and used to elucidate the relative impact of coupler equivalency and reactivity on the fundamental photographic parameter dye yield. The model is designed to use data obtained from photographic coatings, and can assist in determining which photographic systems would benefit from “high reactivity” coupler dispersions as well as in determining whether observed or projected increases (or decreases) in dye yield are due to equivalency or to reactivity.