LIQUID DEVELOPER INCLUDING CHARGE CONTROL AGENT FOR ELECTROSTATOGRAPHY

摘要

A liquid developer for electrostatography comprising a silicone fluid, marker particles and a charge control agent which is soluble in the silicone fluid. The charge control agent may be an organo-metallic compound such as an organo titanate selected from tetra-2-ethyl hexyl titanate, tetra-n-butyl titanate and tetra isopropyl titanate. The organo-metallic compound may be present in a range of from 0.01 to 10 % by weight of the toner particles, with a preferred range of 0.1 to 2 % by weight. A colourant may also be included.