| abstract |
In a toner reclaim type image forming apparatus, when a low image density image is repeatedly formed and then a high image density image is formed on the next day after repeated image formation on both sides of a recording medium. Provided is an electrostatic charge image developer that suppresses the occurrence of streak-like image defects. A toner particle comprising a polyester resin and a styrene (meth) acrylic resin, comprising a sea part containing the polyester resin and an island part containing the styrene (meth) acrylic resin on the surface of the toner particle, A toner particle having a sea-island structure in which an exposure rate of a styrene (meth) acrylic resin is 5 atom% or more and 20 atom% or less, a toner having an external additive, a fluidity in a temperature of 25 ° C. and a humidity of 50% An electrostatic charge image developer having a bulk density satisfying the formula: 65.0 ≦ fluidity × bulk density ≦ 72.5. [Selection] Figure 1 |