| 摘要 |
<p>Electrostatic developer comprising carrier particles which comprise hard magnetic ferrite material exhibiting a coercivity of at least 300 Oersteds when magnetically saturated, and an induced magnetic moment of at least 20 EMU/gm of carrier in an applied field of 1000 Oersteds, coated with a discontinuous resin layer, characterized in that the ferrite material has a single phase hexagonal crystal structure, and contains 1 to 5 percent by weight of lanthanum.</p> |
