| 摘要 |
PURPOSE:To suppress charge up of a developer carrying body by adding an electric charge transferable material to a developer. CONSTITUTION:The charge transferable material which can transfer the exces sive charge of a toner is added to the titled developer. An org. photoconductive material (A) is preferably used as such material. Bromoanyl, tetracyanoquino dimethane, etc., are usable as the material A of the toner for negative- chargeable toner and N-ethylcarbazole, polyvinyl acrydine, etc., are usable for the material A for the positive-chargeable toner. Then, the image having the stable image density without having fogging is obtd. without generating the charge up of the developer carrying body. |
