Transfer type magnetic toner particle

Abstract

Abstract PURPOSE:To improve development and transfer characteristics, by setting the magnetic characteristics, electric resistance, charge quantity and particle size distribution of a transfer type magnetic toner, to a specific range. CONSTITUTION:This transfer type magnetic toner has the following characteristics, that is to say, (1) saturated magnetization is 25-260emu/g, and coercive force is 150-350 oersteds, (2) >=1X10<14>OMEGA in a DC electric field of 10,000V/cm, (3) charge quantity of >=151muC/g, and (4) weight or volume mean particle diameter is within a range of 5-25mum, and the toner has particle size containing 3- 50% in the number of particles of <=5mum. Development is executed satisfactorily by a megnetic brush developing method by (1), the transfer characteristics can be improved and stabilized against humidity by (2), the development and the transfer characteristics can be improved by (3), and generation of ground fog can be prevented by (4).

Inventors

• 👤 Koji Noguchi
• 👤 浩司 野口
• 👤 Masumi Asanae
• 👤 朝苗　益実

Bibliographic Details