| 摘要 |
PURPOSE:To prevent the black lines, black spots, voids, etc., generated by sticking of carriers onto a photosensitive body by forming a triboelectrification series of fine powder particle>toner particles>carrier particles or the carrier particles>toner particles>fine powder particles. CONSTITUTION:The triboelectrification series of the developer contg. the carrier particles and the toner particles is formed of the fine powder particle>toner particles>carrier or the carrier particles>toner particles>fine powder particles. The resin-coated carrier has preferably a spherical shape for the purpose of uniform coating of the fine powder particles. The triboelectric chargeability of the respective particles can be set by selecting the particles of the triboelectric charge quantity by a method for measuring the triboelectric charge quantity, by which the above-mentioned triboelectrification series is attained. The black flaws, black spots, voids, etc., generated by sticking of the carrier particles onto the photosensitive body are prevented in this way. |
