Abstract
Xerography and AgX photography, each representing physical and chemical imaging processes, are compared as for their fundamental aspects.
Three factors, sensitivity distribution of individual grain, grain-size spread and optical filter effect, all contributing to the expansion of exposure range of AgX photography, work less or none in the case of Xerography which can have another factor due to the dependency of discharge rate on field strength.
Analysis reveals that a single imaging cycle of Xerography corresponds to a single－grain layer in the silver halide emulsion coating and that the most prominent strength of Xerography resides in the high degree of system reversibility.
