| 摘要 |
PURPOSE:To obtain image densities which are sufficiently satisfactory while a developer has a high relative electrostatic charge quantity and less splashes toners by respectively specifying the grain size of carriers, the grain size of the toners, the dynamic resistance value of the carriers, and the specific electrostatic charge quantity. CONSTITUTION:The average grain size of the carrier is <=70 mum, the average grain size of the toners is <=14 mum, and the average grain size ratio of the toners/the carriers is <=1/5. The dynamic resistance value of the carriers is <=1.0 X 10<8>OMEGA and the specific electrostatic charge quantity is >=30 muC/g. Since the specific electrostatic charge quantity is >=30 muC/g in such a manner, there is no splashing of the toners. The high-density images are obtd. even if the specific electrostatic charge quantity is high if the dynamic resistance of the carriers is <=1.0 X 10<8>OMEGA. The developing capacity is improve if the average grain size of the carriers and the average grain size of the toners are respectively <=70 mum and <=14 mum and the average grain size ratio of the toners/the carriers is <=1/5. |
