| abstract |
(57) Abstract: [PROBLEMS] To provide a two-component developer that uses a Li-Mn-based ferrite carrier containing no harmful element to obtain a high-quality image. SOLUTION: In a two-component developer comprising a magnetic carrier, a toner containing a binder resin and a colorant, Li 2 O 5 to 15%, MnO 8 to 30%, Fe in molar ratio. 2 O 3 having a basic composition of 60 to 90%, a coating layer made of a resin material is formed on the surface, and D. C. Li-Mn ferrite carrier formed to have a volume resistivity of 10 5 to 10 13 Ω · cm in an electric field of 200 V / cm, an average particle size of 5 to 15 μm, and a triboelectric charge amount of 5 to 60 μc / g in absolute value. And the toner formed on. |