| 摘要 |
PURPOSE:To stabilize the electrifying quantity of the toner in a developer in continuous copying of multiple sheets and to prevent generation of the spent toner by incorporating toner particles, carrier particles and specific pulverous powder as conductive powder into the developer. CONSTITUTION:Toner particles and carrier particles as well as pulverous powder consisting of either of a mixed crystal composed of Ti6O11 and Ti7O13 and/or TiO having <=10mum grain size and <=10OMEGAcm resistivity as conductive powder are incorporated into a developer. Such conductive powder is uniformly dispersed in the developer to prevent the increase in the electrifying quantity of the toner and to decrease considerably generation of the spent toner. Generation of a photographic fog is thus obviated and good durability is obtd. without decreasing image density in continuous copying of multiple sheets. |
