Patent ID: 7687216

Claim:
A two-component developer comprising: a toner containing a binder resin and a colorant; and a carrier having a carrier core material and a coating layer with which the carrier core material is coated, wherein the colorant is selected from the group consisting of a nigrosine dye, a carmine dye, a basic dye, an acidic dye, an oil dye, an anthraquinone dye, a benzidine based yellow organic pigment, a rhodamine based organic pigment, a phthalocyanine based organic pigment, zinc oxide, titanium oxide, furnace black, acetylene black and thermal black, wherein the carrier contains 5 parts by weight or more and 20 parts by weight or less of the coating layer with respect to 100 parts by weight of the carrier core material, and wherein the coating layer of the carrier contains silicone resin and an acrylic resin, said silicone resin being present in the coating layer at 65% by weight and said acrylic resin being present in the coating layer at 30% by weight based on the total amount of the coating layer, said acrylic resin being a copolymer of alicyclic acrylic monomer and at least one acrylic monomer selected from the group consisting of acrylic acids, acrylic esters, dimethyl aminoethyl acrylate, diethyl aminoethyl acrylate, methacrylic acids, methacrylic esters, dimethyl aminoethyl methacrylate, and diethyl aminoethyl methacrylate, and a dielectric loss (tan δ) of the toner is 4.0×10 −3 ≦tan δ≦15.0×10 −3 .