Two-component developer, two-component developer holding container, and electrophotographic image formation apparatus equipped with the container

摘要

A two-component developer includes a magnetic carrier including magnetic carrier particles with an average particle diameter of 35 mu m to 100 mu m, and a toner including toner particles with a weight-average particle diameter of 6.0 mu m to 11.5 mu m, to which at least one additive is externally added thereto in an amount of 0.3 to 1.5 wt.% to the toner, the toner particles including (a) toner particles with a particle diameter of 5 mu m or less with a content ratio of 15% or less by number, and (b) toner particles with such a particle diameter that is two times or greater than the weight-average particle diameter of the toner particles with a content ratio of 5% or less by volume, the toner particles satisfying a relationship of 0.60 </= D25/D75 </= 0.85 as defined in the specification. A container in which the two-component developer is contained, and an electrophotographic image formation apparatus in which the container is incorporated are proposed.