| 摘要 |
Disclosed is a developing agent which permits preventing occurrence of offset and spent toner, which permits obtaining a picture image having a sufficiently high image density, which can be used in a fixing device that does not include an oil supply mechanism. The developing agent comprises a coloring agent, a binder containing a polyester resin as a main component, a charge controller consisting of a zirconium complex compound of a salicylic acid derivative, silica subjected to a hydrophobic treatment, and titanium oxide.
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