Patent ID: 7422833

Claim:
A toner comprising a binder resin, a colorant and a charge control resin for positive and/or negative charge, wherein the number of colorant particles having a length of at least 0.2 μm in area of 100μm×100 μm of a toner sheet having a thickness of 20 μm is at most 50 wherein the toner sheet is obtained by placing the toner on a slide-glass, placing a cover-glass on top of the thus-placed toner, heating them to 170° C. by using a hot-plate to melt the toner, and pressing the cover-glass to adjust a thickness of the melted toner to 20 μm as observed by a thickness meter, and, wherein the charge control resin for positive and/or negative charge are/is a polymer having a substitution group containing monovinyl monomer unit.