A Study of a New Colour Granularity Formula

A new mathematical formula for colour granularity has recently been proposed by Saunders1. Whereas some previously derived mathematical expressions of colour granularity have proved difficult to apply in practice due to the existence of terms having no real physical correlate, this new formula relates granularity to easily measured film parameters. Using this formula, successful granularity predictions have been made for a series of single-laver colour negative structures in which the coupler silver halide ratio was systematically varied.