Developer for developing electrostatic image, image forming apparatus and image forming method

摘要

A developer, which includes a base toner containing at least a binding resin and a coloring agent; and inorganic fine particles; wherein the base toner satisfies 105<=SF-1<=130 and 120<=SF-2<=180, wherein SF-1=((absolute maximum length of a particle of the base toner)<2>/area of the particle of the base toner)x(pi/4)x100, wherein SF-2=(peripheral length of the particle of the base toner)<2>/(area of the base toner)x(¼pi)x100, wherein the inorganic fine particles have an average particle diameter that ranges between 30 nm to 160 nm.