Patent ID: 7144666
Filing Date: 2006-12-05
Classification: G03G

Abstract:
1. A toner comprising: toner particles containing a binder resin and a colorant; and a first external additive including large silica particles in an amount of 0.1 to 3.0 wt % relative to the toner particles and having an average particle size of 20 to 200 nm; a second external additive including small silica particles in an amount of 0.1 to 3.0 wt % relative to the toner particles and having an average particle size of 5 to 20 nm; a third external additive including 0.1 to 2.0 wt % of hydrophobic titanium dioxide microparticles relative to the weight of the toner particles, with a resistance of 10 a fourth external additive including at least one of 0.1 to 2.0 wt % of conductive titanium dioxide particles relative to the weight of the toner particles with a resistance of 1 to 10