Patent ID: 6544704
Filing Date: 2003-04-08
Classification: G03G

Abstract:
A two-component developer comprising:a toner which contains at least a resin and a colorant and to which an external additive is added; and a carrier; wherein said toner has a number average molecular weight not greater than 3,000, and comprises molecules having a molecular weight not greater than 1,000 in an amount of not less than 40 number %, and wherein said carrier satisfies the following relationship (1): 3,000,000&lE;&sgr;1000Ã—Dc3&lE;20,000,000â€ƒâ€ƒ(1) wherein &sgr;1000 represents a magnetization in emu/g of said carrier at 1,000 oersted; wherein Dc represents a volume average particle diameter in &mgr;m of said carrier; and wherein the volume average particle diameter of said carrier is not larger than 65 &mgr;m.