US Patent 7183032 Toner for electrostatic image development

A toner for electrostatic image development, containing a resin binder containing a polyester, a colorant, and a releasing agent containing an ester wax and a petroleum wax; and a process for preparing a toner for electrostatic image development, including the step of melt-kneading raw materials for the above toner, wherein the melt-kneading step is carried out with an open-roller type kneader. The toner for electrostatic image development is used for the development of a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.