Magnetic single-component developer

摘要

A magnetic single-component developer includes a spherical toner containing at least a magnetic powder and not containing a release agent in a binder resin, and a nonspherical toner containing at least a magnetic powder and a release agent in a binder resin. According to measurements taken from a scanning electron microscope image taken from 100 toner particles in the magnetic single-component developer, the spherical toner has a circularity of 0.980 or more, the nonspherical toner has a circularity of 0.960 or less, and a particle number ratio (A) / (B) of the number (A) of particles of the spherical toner to the number (B) of particles of the nonspherical toner is 3/7 or more and 5/5 or less.