ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER

摘要

PROBLEM TO BE SOLVED: To provide electrostatic charge image developing toners suitable for a two-component magnetic brush development system which is large in a development gap by providing the toners with good electrostatic charge stability, high image quality and durability in combination. SOLUTION: The electrostatic charge image developing toners to be used for the two-component magnetic brush development system of >=0.8mm in the development gap consist of a compsn. contg. at least coloring agents and charge control agent in a binder resin. The toners have a rheology characteristic of|Δtanδ|=|tanσ(ω-7deg)-tanσ(ω-0.7deg)|<=1.3 in the relation between a tangent loss (tanδ) to a distortion (ω).