Toner and fixing method

A fixing method using a fixing device comprising a heat roller and a pressure roller pressed to the heat roller, comprising:

• preparing a recording medium on which a toner image is formed;
• and
• passing the recording member through a nipping section between the heat roller and the pressure roller pressed to the heat roller,
• wherein a toner for forming a toner image on the recording member has binder resin and a coloring agent and in a viscoelasticity curve of the toner in which an axis of ordinate indicates storage modulus G′ and an axis of abscissa indicates temperature T, temperature Tp giving maximum value G′max of the storage modulus G′ is 55 to 65° C. and among calculated values S obtained by a formula indicated below at each temperature, temperature Ts giving minimum value Smin is 50° C. or higher (when Smin is the same at two or more different temperatures, a temperature closest to Tp is set to Ts).
• [Formula]
• S
• =
• G
• T2
• ′
• -
• G
• 40
• ′
• T2
• -
• 40
• -
• G
• T1
• ′
• -
• G
• 40
• ′
• T1
• -
• 40
• where
• T1=optional measurement temperature (° C.),
• T2=next measurement temperature of T1, T1<T2 (° C.),
• G′40=storage modulus of toner measured at 40° C. (Pa),
• G′T1=value of G′ measured at T1° C. (Pa), and
• G′T2=value of G′ measured at T2° C. (Pa).