A toner manufacturing method includes grinding and classification to produce a toner containing a binder resin and a colorant with a weight mean particle size of 5 microns to 12 microns and sharp particle density distribution. The toner has a specific circularity, relationship between cut ratio and weight...http://www.google.de/patents/US6586151?utm_source=gb-gplus-sharePatent US6586151 - Toner, process for producing toner image forming method and apparatus unit
