Magnetic carrier

A method for producing a magnetic carrier which comprises a magnetic carrier core and a resin covering layer formed on a surface of the magnetic carrier core, wherein

• the resin covering layer contains a resin component and an inorganic fine particle, a content of the inorganic fine particle in the resin covering layer being 1.0 to 10.0 parts by mass based on 100 parts by mass of the resin component in the resin covering layer,
• the inorganic fine particle is a fine particle of at least one oxide selected from the group consisting of MgO and Al2O3,
• the inorganic fine particle having a moisture adsorption rate of 25.0% by mass or less when allowed to stand in an environment of a temperature of 30° C. and a humidity of 80% for 72 hours, an electrical conductivity of 2.0×10−9 to 2.5×10−5 μS/m, and a degree of crystallinity of 60% or less,
• the method comprising the steps of:
• (a) providing a magnetic carrier core;
• (b) providing an inorganic fine particle of at least one oxide selected from the group consisting of MgO and Al2O3, which has a crystallinity of 90% or more;
• (c) subjecting the inorganic fine particles provided in step (b) to a mechanochemical treatment to form an inorganic fine particles having a crystallinity of 60% or less;
• (d) providing a resin solution containing a resin component and the inorganic fine particles resulting from step (c);
• and
• (e) coating a surface of the magnetic carrier core with the resin solution to form the resin covering layer.