| 摘要 |
PURPOSE:To obtain an image faithful to a latent image without depending on the condition of a transfer material and, especially, to obtain the high quality image without the omission of transfer by making developer contain magnetic toner containing binding resin and magnetic powder, and specified resin particulates at a specified rate. CONSTITUTION:A conductive transfer roller 2 which abuts on an electrostatic charge image holding body(photosensitive body) 1 is constituted of a core bar 2a and a conductive elastic layer 2b, and bias voltage is impressed on the core bar 2a by a constant voltage power source 3. The electrostatic charge image on the photosensitive body 1 is developed with the developer for an electrostatic charge image so as to form a developed image. The developed image is electrostatically transferred to the surface of the transfer material by allowing the roller 2 to abut on the surface of the photosensitive body 1 through the transfer material. In such a case, the developer containing at least 100 pts.wt. magnetic toner containing the binding resin and the magnetic powder and 0.01-1.0 pts.wt. resin particulates whose surfaces are treated by fatty acid or the derivative of fatty acid and whose average grain size is 0.03-2.0mum is used as the developer for the electrostatic charge image. |
