abstract |
PROBLEM TO BE SOLVED: To provide a toner having excellent stability that can maintain good transferability and cleaning properties over a long period of time, has no fluctuations in image unevenness, has little change in fluidity and chargeability over a long period of time. And an external additive A surface of the toner core comprising an inorganic oxide having a large particle diameter external additive has a particle size of 50 to 500 nm, the weight average particle diameter D 4 of the toner, linear maximum length Dcut the particle size of the cut surface of the toner satisfying 0.8D 4 or more, the shape of toner to be observed in TEM photographs taken at 10,000 times using a transmission electron microscope, that does not intersect the toner core If contact at two points, the average distance between two points has a 0.1 D 4 or more recesses, inorganic oxide the number present in the area formed by the tangent and the recess is determined from any of the ten toner The toner satisfies 1 ≦ N after / N before ≦ 5 in terms of value, where N before stress is applied and N after the stress is applied. [Selection] Figure 1 |