| abstract |
Provided is a magnetic toner that can obtain a stable image for a long period of time even in double-sided output regardless of the use environment, is excellent in offset property in high-speed fixing, and can reduce toner consumption. In a magnetic toner containing at least a binder resin and a magnetic substance, (i) the binder resin contains a vinyl resin unit, and (ii) the toner has a weight average particle diameter of 5.0 to 5.0. 9.0 μm, (iii) the toner has a specific gravity of 1.1 to 1.6 g / cm 3 , and (iv) the toner has a saturation magnetization of 20 to 35 Am 2 / kg at a magnetic field of 796 kA / m. (V) The dielectric constant of the toner at 100 kHz and 40 ° C. is 15 to 40 (pF / m), and (vi) the frequency dependence of the dielectric loss tangent (tan δ) of the toner at 40 ° C. is 0.7 ≦ (Tan δ 100K −tan δ 2K ) / tan δ 2K ≦ 1.7 is satisfied. [Selection figure] None |