ENTWICKLER FUER DIE ENTWICKLUNG VON ELEKTROSTATISCHEN LADUNGSBILDERN

摘要

A developer for developing electrostatic latent images, comprising a mixture of toner and fine powder of silicic acid wherein the mixture has a ratio of B/A of 0.9 or larger provided that the mixture contains A wt. % thereof of the silicic acid fine powder, and contains B wt. % thereof of the silicic acid fine powder after the mixture has been passed through a 200 mesh-sieve. The developer may be produced by mixing the toner and fine powder silicic acid using a multi-stage mixer equipped with rotary mixing vanes.