TWO-COMPONENT DEVELOPER

摘要

A two-component developer including at least a toner and a carrier. The toner includes a coloring particle prepared by agglutinating and fusing a resin particle having colorants and a resin particle having wax, and 0.2 - 2.0 wt.% hydrophobic silica and 0.01 - 1.0 wt.% a hydrotalcite-like compound as external additives. A shape coefficient of the toner is 0.93 - 0.99. The carrier includes at least a magnetic particle coated with a silicone resin layer, with a volume average particle diameter of 20 - 100 µm. The two-component developer has no disadvantages of conventional two-component developers composed of toner and a silicone resin carrier made by polymerization but with long-term triboelectric charging performance and long-term high-quality image development ability.