Patent ID: 8426094
Filing Date: 2013-04-23
Classification: G03G

Abstract:
1. A magnetic toner comprising magnetic toner particles, each of the toner particles containing a binder resin and a magnetic material, and an inorganic fine powder, wherein: (1) the magnetic material is prepared by treating magnetic iron oxide on the surface with a silane compound; (2) when the magnetic iron oxide is dispersed in an aqueous solution of hydrochloric acid and dissolved until the dissolution proportion of the iron element reaches 5% by mass based on the total amount of the iron element contained in the magnetic iron oxide, the amount of silicon eluted by that point of time is 0.05% by mass or more and 0.50% by mass or less based on the magnetic iron oxide; and (3) the magnetic material has a moisture adsorption amount per unit area of 0.30 mg/m