Toner and method of producing toner

A method of producing a toner, comprising:

• granulating a monomer composition containing a polymerizable monomer, a colorant, and an addition reactive resin having a double bond in an aqueous medium;
• and
• polymerizing the monomer composition to produce toner base particles, wherein:
• the toner contains toner particles having the toner base particles containing at least a binder resin and the colorant;
• when viscosities of the toner particles measured at 100° C. and 110° C. by a flow tester heat-up method are represented by η100 (Pa·s) and η110 (Pa·s), respectively, an average variation in viscosity AηT represented by the following equation (1) satisfies a relationship of 0≧AηT−0.064:
• AηT=(log(η110)−log(η100))/(110−100) (1);
• and
• η100 is 15,000 to 40,000 Pa·s, and wherein
• the addition reactive resin has signals in a range of 4.6 to 4.9 ppm and in a range of 5.0 to 5.2 ppm in a 1H-NMR chart in a nuclear magnetic resonance measuring device.