Patent ID: 7678524

Claim:
A magnetic toner comprising at least: a binder resin; and a magnetic body having thereon a high-density coating layer of at least one of SiO 2 , TiO 2 or Al 2 O 3 , wherein the magnetic body comprises spherical particles, and wherein, when magnetization at a magnetic field strength of 397.9 kA/m and a coercive force of the magnetic toner are denoted by σs (Am 2 /kg) and Hc (kA/m), respectively, a magnetic field strength at which the magnetic toner shows a magnetization value equal to 95% of σs is denoted by H95% (kA/m), and a number average particle size of the magnetic body is denoted by d (μm), H95%, Hc, and d satisfy the following expressions 151<H95%<200 (1) 7.1<Hc<12 (2) 40 <Hc/d< 150 (3)