NONMAGNETIC ONE-COMPONENT TONER AND IMAGE FORMING METHOD

摘要

PURPOSE:To prevent the lowering of image density by a reduction of the amt. of a toner transferred to a toner carrier due to the deterioration of the flowability of the toner by specifying the volume average diameter of the toner and the content of particles of a prescribed diameter or below. CONSTITUTION:The volume average diameter of a toner is regulated to 10.0-13.0mum and the content of particles of <=5mum diameter to 1.0-4.0vol.%. The toner may be produced by blending a colorant such as carbon black with a resin binder such as a styrene-n-butyl acrylate copolymer, a releasing agent such as low molecular polypropylene wax and an electric charge controlling agent such as quat. ammonium salt.