| 摘要 |
<p>PURPOSE:To provide a carrier capable of giving a high quality image having high image quality, high definition and high image density over a long period of time, hardly lowering image density or causing blurring even when a color original having a large image area is continuously copied, ensuring rapid start up of triboelectric charge between a toner and the carrier and having low dependency of triboelectric charge on the environment. CONSTITUTION:This electrophotographic carrier has 15-45mum 50% average particle diameter (D50) and contains 1-20% carrier particles having <=22mum, <=3% carrier particles having <=16mum, 2-15% carrier particles having >=62mum and <=2% carrier particles having >=88pm. The specific surface area S1 of this carrier measured by an air permeation method and the specific surface area S2 calculated by the equation satisfy 1.2<=S1/S2<=2.0.</p> |
