| 摘要 |
PURPOSE:To from images which have a high image density and are free from fogging stably over many times by incorporating a carrier formed by coating magnetic material particles with fluoroplastic, a toner contg. a styrene/acrylic copolymer of <=2 acid value and a carbon black treated with an amino-modified silicone oil into the above developer. CONSTITUTION:This developer contains the carrier formed by coating the magnetic material particles with the fluoroplastic, the toner contg. the styrene/acrylic copolymer of <=2 acid value and the carbon black treated with the amino- modified silicone oil. A release property adequate for the developer 4 is imparted to the developer by the carbon black particles treated with the amino-modified silicone oil. Since the excessive electrostatic charge of the developer 4 is prevented, the physical adhesive strength of the developer 4 onto the surface of the org. photosensitive body is small. The good transfer by an electrostatic transfer means is executed in a transfer stage in this way and the sharp images which have the high image density and are free from the unequal images are surely formed. |
