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Electrophoresis in liquid development of electrophotographic images

Liquid immersion development of electrostatic images involves the electrophoretic motion of charged toners and counter-ions in a spatially non-uniform and time-varying electric field originating from the imagewise charge on the photoreceptor. This paper summarizes the recent coordinated theoretical and experimental investigation of electrophoresis under a condition closely simulating the actual development process. The roles of chase density and mobility in the development process are elucidated by the theory of space-charge-limited transport. Their values are determined by a novel characterization technique, and are shown to be consistent with the prediction from the electrical double-layer model.