THE RELATIONSHIP BETWEEN COUPLING KINETICS AND THE NOISE PROPERTIES OF COLOR NEGATIVE FILMS .1. BASIC COLOR NEGATIVE FILM RESPONSE CHARACTERISTICS

A new approach to modelling colour film granularity, which combines th e kinetic theory of dye cloud formation with existing granularity theo ries through the dye yield curve, is introduced. Good agreement betwee n measured and calculated RMS-granularities was found for a set of sin gle layer coatings containing a monodisperse emulsion and various coup lers at four concentrations each. Investigations of the overall perfor mance of the layers in terms of the signal-to-noise ratio showed that the maximum value of this quantity did not depend on coupler concentra tion, reactivity and equivalency.