Bilderzeugungsverfahren und Anwendung eines spezifischen Entwicklers in einem Bilderzeugungsgerät

摘要

In the image forming machine of the invention, a two-component type developer has a spherical magnetic powder dispersion type carrier, which has a weight average particle diameter of from 15 to 60 mu m. The external additive is present in the form of primary or secondary particles on the toner particle, and comprises inorganic oxide fine particles A having a shape factor SF-1 of from 100 to 130, and non-spherical inorganic oxide fine particles B, having a shape factor SF-1 larger than 150 and having been obtained by combining a plurality of particles.