| 摘要 |
PROBLEM TO BE SOLVED: To provide a carrier powder used for an electrophotographic developer, the power having excellent magnetic characteristics but hardly damaging a photoreceptor, and also to provide an electrophotographic developer containing the carrier powder. SOLUTION: The carrier powder for an electrophotographic developer is prepared to have a circularity of 0.8 to 1.0, a specific surface area CS of 0.17 m<SP>2</SP>/cc to 0.185 m<SP>2</SP>/cc assuming the particle as a sphere, and a surface roughness factor of 2.0 to 2.5. This suppresses a magnetic brush formed on a developing sleeve from hardening. COPYRIGHT: (C)2008,JPO&INPIT
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