Patent ID: 8541153

Claim:
A toner for developing an electrostatic image, comprising: a toner particle having at least one of an oxidation polymerizable monomer and a polymer having an ethylenically unsaturated group, and an outer additive containing an oxidation polymerization catalyst in a form of a composite with inorganic particles, wherein the oxidation polymerization catalyst includes an enzyme, wherein a temperature T(10 Mpa) and a temperature T(1 Mpa) satisfies the following expression (1): 20° C.≦ T (1 MPa)− T (10 MPa) (1) wherein, the temperature T(10 Mpa) is a temperature at which a viscosity of the toner under a pressure of 10 Mpa applied with a flow tester becomes 10 4 Pa·s, and the temperature T(1 Mpa) is a temperature at which a viscosity of the toner under a pressure of 1 Mpa applied with a flow tester becomes 10 4 Pa·s.