Patent ID: 6852461

Claim:
A developing agent containing toner particles, said toner particle containing a binder resin and a coloring agent, said binder resin containing a first polyester resin having a softening point Sp 1 and a glass transition point Tg 1 , in which a difference between Tg 1 and Sp 1 falls within a range of between 30° C. and 50° C., a second polyester resin having a softening point Sp 2 higher than said softening point Sp 1 and a glass transition point Tg 2 in which a difference between Tg 2 and Sp 2 falls within a range of between 0.1° C. and 10° C. and having crystalline characteristics, a first wax having a melting point Mp 1 higher than said softening point Sp 2 , and a second wax having a melting point Mp 2 lower than said softening point Sp 2 .