| 摘要 |
A magnetic toner includes magnetic toner particles containing at least a binder resin and a magnetic iron oxide. The magnetic iron oxide contains 0.2 to 4.0% by weight of at least one metal element selected from the group consisting of Mn, Zn, Ni, Cu, Co, Cr, Cd, Al, Sn and Mg, and 0.2 to 0.8% by weight of silicon element on the basis of an iron element; the ratio (Bsi/ASi) x 100 of the content BSi of the silicon element present in the magnetic iron oxide up to an iron element solubility of 20% by weight to the total content ASi of the silicon element present in the magnetic iron oxide is 45 to 85%; the ratio (Csi/ASi) x 100 of the content CSi of the silicon element present in the magnetic iron oxide up to an iron element solubility of 10% by weight to the total content ASi is 35 to 70%; and the magnetic toner has a weight average particle diameter of 3.5 to 10.0 mu m, and contains 0 to 30% by volume of magnetic toner particles having a volume particle diameter of 12.7 mu m or more determined from a volume distribution. <IMAGE> |
