| 摘要 |
<p>PURPOSE:To provide a magnetic toner suitable for magnetic image/character identification with which magnetic picture images having enough signal intensity, picture density and excellent printing durability are obtd. CONSTITUTION:The magnetic toner contains at least a binder resin and magnetic fine particles as the essential components. The residual magnetization sigmarm of the magnetic fine powder, residual magnetization sigmart of the toner, and the proportion of the amt. of the magnetic fine powder Wwt.% to the toner satisfies the relations of 4.2<sigmart<=7, 7<=sigmarm<=24, and 30<=W<=70. The magnetic toner contains a polyethylene resin having 1000-10000 number average mol.wt. as an essential component.</p> |
