摘要 |
PURPOSE: To provide a two-component noncontact developing device capable of stably obtaining an image with high resolution and developability at a lower developing bias voltage. CONSTITUTION: In the noncontact developing device carrying a two-component developer D to a developing area A by a developing sleeve 81 and provided with a control electrode 84 constituted in such a manner that an electrode part 84a capable of applying a voltage, which is fixed on an insulating member 83 abutted on the developer layer D is disposed in the developing area A of the developing sleeve 81 or the upstream part from the area A, when the quantity of the developer carried to the area A is defined as Dws (g/cm<2> ), 0.005<Dws<0.07 is obtained and when the height (μm) of the napping of the developer in the area A, at the time of abutting on the control electrode 84 is defined as h1 and the height (μm) of the napping of the developer in the area A, at the time of detaching the control electrode 84 is defined as h2 , 0.3<h1 /h2 <1 is obtained. |