| 摘要 |
<p>PURPOSE:To attain high image quality without deteriorating the fluidity of a toner by possessing the particle diameter distribution of a toner with two peaks at the upper side and lower side of specific average particle diameter of the toner. CONSTITUTION:The toner having 6mum average diameter is mixed in the ratio of (1:1)-(3:2) so that the particle diameter distribution of the toner has two peaks at the upper side and lower side of 8mum average particle diameter. That is, the toner having high image quality being a merit of the small particle toner together with fluidity being a merit of the large particle toner is obtained. And the amount of an electrification controlling agent added to the small particle toner is regulated to >=2 times of the amount of electrification controlling agent added to the large particle toner. Thus, by increasing the amount of the electrification controlling agent added to the small particle toner, the chargeability of the toner is improved and the lowering of electrifying quantity in the lapse of time is decreased.</p> |
