Patent ID: 9235151
Filing Date: 2016-01-12
CPC Classification: G03G

Claim Text:
1. A magnetic toner comprising: magnetic toner particles comprising a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein; the inorganic fine particles present on the surface of the magnetic toner particles comprise silica fine particles and at least one of alumina fine particles and titania fine particles, wherein; when a coverage ratio A (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles each of which has a particle diameter of from at least 5 nm to not more than 50 nm and a coverage ratio B (%) is a coverage ratio of the magnetic toner particles' surface by the inorganic fine particles each of which has a particle diameter of from at least 5 nm to not more than 50 nm and is fixed to the magnetic toner particles' surface, the magnetic toner has a coverage ratio A of at least 45.0% and not more than 70.0% and a ratio [coverage ratio B/coverage ratio A] of the coverage ratio B to the coverage ratio A of at least 0.50 and not more than 0.85, and wherein at least one of the alumina fine particles and the titania fine particles each of which has a particle diameter of from at least 100 nm to not more than 800 nm is present on the surface of magnetic toner particles at from at least 1 particle to not more than 150 particles, as the total number of the alumina fine particles and the titania fine particles, per magnetic toner particle.