摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic toner which is capable of suppressing the scattering of the toner to the periphery of a letter, fogging, the acceleration of roughness, the occurrence of a photosensitive member flaw, and the scattering of the magnetic toner in a machine even when it is used in a large-capacity process cartridge with an increased process speed or an increased toner loading weight in an developing unit and in addition is excellent in fine-line reproducibility, and can achieve a low toner consumption. SOLUTION: The magnetic toner including at least: a binder resin; and a magnetic body, in which, when magnetization at a magnetic field strength of 397.9 kA/m and a coercive force of the magnetic toner are denoted byσs (Am<SP>2</SP>/kg) and Hc (kA/m), respectively, a magnetic field strength at which the magnetic toner shows a magnetization value equal to 95% ofσs 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). COPYRIGHT: (C)2007,JPO&INPIT
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