MAGNETIC DEVELOPER

摘要

A dry magnetic developer for use in electrophotography consists essentially of particles of a composition comprising a binder resin and a powdery magnetic material dispersed in the binder resin, wherein the magnetic material is composed of non-pulverizing agglomerates having a number average particle size of 1 to 10 microns, and which have been formed by granulating and sintering fine cubic particles of magnetite or another ferrite having a number average particle size of 0.1 to 1 micron.