| 摘要 |
A charging device at least includes a first charging member held in contact with an image carrier, a toner image of toner containing toner mother particles and an external additive added thereto being to be formed thereon, a bias showing a polarity same as that of the charged potential of toner being to be applied thereto, a second charging member arranged downstream relative to the first charging member as viewed in the moving direction of the image carrier and in held in contact with the image carrier, a bias showing a polarity opposite to the charged potential of toner being to be applied thereto, a collection member held in contact with the second charging member to collect the toner adhering to the second charging member, a bias being to be applied thereto and a collection member bias control unit for controlling the bias to be applied to the collection member according to image forming conditions information.
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