| 摘要 |
An electrophotographic developer is provided that attains improvement in reliability by improvement in cleaning property and reduction in wear of a photoreceptor in a well-balanced manner without impairing high transfer efficiency and high image quality of a spherical toner. The electrophotographic developer contains a toner and a carrier, the toner containing spherical colored particles having an average shape factor (ML2/A) of about from 100 to 135 and irregular-shaped non-colored particles having a volume average particle diameter of about from 1 to 10 mum, a charge distribution of the developer having a peak value Q/Ma ascribable to the spherical colored particles and a peak value Q/Mb ascribable to the irregular-shaped non-colored particles, and the peak value Q/Ma and the peak value Q/Mb satisfying both the following formulae (1) and (2):<paragraph lvl="0"><in-line-formula>20 muC/g<=|Q/Ma|<=85 muC/g (1)</in-line-formula><paragraph lvl="0"><in-line-formula>-0.7Q/Ma<=Q/Mb<=0.5Q/Ma (2)</in-line-formula>
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