Patent ID: 8084174

Claim:
A toner, comprising: toner particles each containing at least a binder resin, a wax, and a magnetic iron oxide; and inorganic fine particles, wherein: (1) the magnetic iron oxide contains at least a Ti element, an Al element, an Si element, and an Fe element; (2) a content of the Ti element in the magnetic iron oxide is 0.30 to 5.00 mass % with respect to an entirety of the magnetic iron oxide; (3) a content of the Al element in the magnetic iron oxide is 0.10 to 3.00 mass % with respect to the entirety of the magnetic iron oxide; (4) an Al element amount eluted when the magnetic iron oxide is loaded into an alkaline aqueous solution and the Al element in the magnetic iron oxide is eluted with the alkaline aqueous solution is 50.0% to 95.0% of a total Al element amount in the magnetic iron oxide; (5) when an Fe element amount in a solution completely dissolving the magnetic iron oxide from which an Al element has been eluted with the alkaline aqueous solution in the section (4) is defined as a total Fe element amount, a sum of an Al element amount in a solution prepared by dissolving the magnetic iron oxide from which an Al element has been eluted with the alkaline aqueous solution in the section (4) in an acidic solution so that an Fe element amount therein reaches 10 mass % of the total Fe element amount (the solution being hereinafter referred to as a solution with an Fe element dissolution ratio of 10 mass %) and the Al element amount eluted in the section (4), accounts for 95.0% to 100.0% of the total Al element amount in the magnetic iron oxide; and (6) a ratio of a Ti element amount to the Al element amount (Ti element amount/Al element amount) in the solution with an Fe element dissolution ratio of 10 mass % is 2.0 to 30.0, and wherein the toner has a dielectric loss tangent calculated from its complex dielectric constant measured at a temperature of 140° C. a frequency of 10 kHz of 1.0×10 −3 to 5.0×10 −1 .