| 摘要 |
PURPOSE:To prevent the formation of a spent toner by stabilizing the extent of electrification of a toner in a developer. CONSTITUTION:This developer contains toner particles, carrier particles and electrically conductive powder having <=10mum particle size and <=10OMEGAcm resistivity. The electrically conductive powder is powder of a pure metal or a metallic compound such as a metallic oxide, preferably SnO2, and the content of the electrically conductive powder is 0.01-1wt% basing on the total amount of the carrier and the toner. The electrically conductive powder in the developer prevents an increase in the extent of electrification of the toner, reduces the formation of a spent toner, and improves the deterioration of the developer due to aging. |
