Two-component developer for use in dry development of electrostatic pattern

摘要

A two-component developer for use in dry development of electrostatic charge pattern, comprising a mixture of magnetic carrier particles and electroscopic toner particles, characterized in that said magnetic carrier particles have a relaxation time B (msec) satisfying the equation 0<B<20 when they are situated in a dynamic state and said developer has a relaxation time A (msec) satisfying the equation: 0.35B+11<A<0.35B+14 when it is situated in a dynamic state.