Ink development of electrostatic images

Abstract From the Canadian patent

Abstract of the Disclosure, The process disclosed relates to the ink development of an electrostatic image. It includes the steps of forming an electrostatic image on a charge retaining surface, wetting the charge retaining surface with a thin layer of dielectric liquid which is chemically inert toward the surface, inking the charge retaining surface with an electrically conductive liquid ink formulation which is immiscible with the dielectric liquid, inducing at the interface between the ink and the dielectric liquid a charge differential with respect to the electrostatic image on the charge retaining surface, and when the induced charge, density at the dielectric liquid-oil interface …