Patent ID: 6183925
Filing Date: 2001-02-06
Classification: G03G

Abstract:
A two-component developer for developing electrostatic latent images comprising:(a) carrier particles comprising a first binder resin and first magnetic particles which are dispersed in the first binder resin, the first magnetic particles being present in an amount in the range of from 350 to 900 parts by weight based on 100 parts by weight of the first binder resin, the first binder resin having a viscosity in the range of from 10.sup.5 to 10.sup.7 poise at 100.degree. C., the first magnetic particles being selected from the group consisting of ferrite particles and magnetite particles, the ferrite particles being of the formula (MO).sub.x.multidot.Fe.sub.2 O.sub.3 in which M is a metal atom selected from the group consisting of Mg, Co, Ni, Cu, Zn and Mn, and X is an integer selected from 1, 2 and 3; and(b) toner particles comprising a second binder resin, a colorant and from 0.5 to 6 parts by weight of second magnetic particles based on 100 parts by weight of the second binder resin, the second magnetic particles being selected from the group consisting of ferrite particles and magnetite particles, the ferrite particles being of the formula (MO).sub.x.multidot.Fe.sub.2 O.sub.3 in which M is a metal atom selected from the group consisting of Mg, Co, Ni, Cu, Zn and Mn, and X is an integer selected from 1, 2 and 3.