Abstract: Reinders' redox buffers were used to study the redox properties of sensitivity centers and latent image centers on microcrystals of cubic silver bromide emulsion in this paper. The results showed that: 1) reinders' redox buffers were used to study the redox properties not only for latent image centers but also for sensitivity centers; 2) The redox potential of Ag₂S sensitivity centers was less negative than －220 mV with respect to the saturated calomel electrode in our experiment and the redox potential of latent image centers was between －220 mV and －190 mV; 3) The redox activities of latent image centers were much higher than that of sensitivity centers.

Key words: sulfur sensitization, redox, sensitivity centers, latent image centers