Patent ID: 7294443

Claim:
A method for manufacturing a toner composition comprising toner particles and a charge controlling agent, comprising: preparing toner particles comprising a binder resin and a colorant; and mixing the toner particles with a charge controlling agent using a mixer having a rotor to form the toner composition, wherein the toner composition has a spherical degree of from 0.96 to 0.99, and wherein the toner composition satisfies the following relationship: 10 ≦M/T ≦1,000 wherein M represents a quantity of an element on a surface of the toner particles in units of % by weight, wherein the element is included only in the charge controlling agent, and is one of elements of second to fifth periodical elements in the long form periodic table, other than carbon, oxygen and rare gas elements; and T represents a quantity of the element in the toner composition in units of % by weight.