Mechanism of liquid development of electrophotography was studied by use of a comparatively simple system wherein polyester film with copper evaporated on the back side was used as Electrofax layer and two kinds of dispersions as developers; one was a dispersion of Aerosol OT and carbon black in
n-Hexane (A-type) and the other a dispersion of methacrylate polymer and carbon black in
n-Hexane (M-type).
From this study it was suggested that liquid development is mainly carried out through electrophoresis and that other factors, such as dielectric polarization and wetting, should be taken into consideration when the mechanism of liquid development is discussed.
Furthermore, development characteristics of weakly negative toner and space charge of toner and particle size of toner were investigated.
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