| 摘要 |
Disclosed is a developing agent for use in an image forming apparatus which includes a toner recycle mechanism. A particulate low-resistance component and silica particles are added to the surfaces of toner particles of the developing agent. The addition amount of low-resistance component with respect to the toner particles is 0.2 to 1.0 wt %. The weight ratio of the low-resistance component in recycled toner to the low-resistance component in developed toner is 1.0 to 1.2. The low-resistance component residual ratio of unused toner after passage through an air classification apparatus is 0.95 to 1.0.
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