| 摘要 |
The objective of the present invention is to provide a developing roller that can form a toner image with high quality. The present invention relates to a developing roller comprising: a supporting shaft, and at least one resin layer formed on a peripheral face of the supporting shaft, the resin layer containing carbon black in which a number average Feret's diameter is in a range from 5 to 300 nm and primary particles account for 5% or more on a number basis, and the carbon black being dispersed in a base resin material thereof.
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