Patent ID: 7288354
Filing Date: 2007-10-30
Classification: G03G

Abstract:
1. A toner comprising toner particles which comprise toner base particles containing at least a binder resin, a magnetic material and inorganic fine particles, wherein; said toner base particles having a circle-equivalent diameter of from 3 μm or more to 400 μm or less as measured with a flow type particle image analyzer have an average circularity of from 0.935 or more to less than 0.970; said toner base particles have an average surface roughness of from 5.0 nm or more to less than 35.0 nm as measured with a scanning probe microscope; and said binder resin contains at least a vinyl resin having a carboxyl group and a vinyl resin having as partial structure a linkage formed by the reaction of a carboxyl group with an epoxy group.