THE CHASMAN GRANULARITY MODEL APPLIED TO COLOR NEGATIVE PHOTOGRAPHIC MATERIALS INCORPORATING SILVER DEVELOPMENT MODIFYING COUPLERS

A modified version of the Chasman equation linking dye granularity to underlying developed silver granularity of a colour negative photograp hic material has been studied. It was found that this mathematical rel ationship can successfully predict absolute dye granularity for photog raphic materials incorporating either development inhibitor or acceler ator releasing coupler. It was also shown that an algebraic modificati on to the equation tested can lead to a significant reduction in the e rrors in calculating dye granularity.