Toner and two-component developer

A method for producing a toner which comprises toner particles each containing at least a binder resin and a wax, and an external additive, comprising:

• melt kneading a binder resin, a wax, and a polymer having a structure obtained by reacting a vinyl-based resin component and a hydrocarbon compound;
• cooling the molten kneaded product;
• pulverizing the cooled product coarsely and pulverizing the coarsely pulverized product with a mechanical type pulverizer;
• treating the surface of the resultant fine pulverized product with hot air, and then cooling the surface-treated product with cold air to provide toner particles, wherein a temperature of the hot air is 100° C. or higher and 450° C. or lower, a temperature of the cold air is −50° C. or higher and 10° C. or lower, and the cold air has an absolute moisture content of 5 g/m3 or less;
• and
• adding the external additive to the toner particles, wherein the surface of the toner particles have an average surface roughness (Ra) measured with a scanning probe microscope of 2.0 nm or more and 25.0 nm or less;
• wherein the toner has a surface tension index I for a 45-vol % aqueous solution of methanol measured by a capillary suction time method and calculated from the following equation (1) of 5.0×10-3 N/m or more and 1.0×10-1 N/m or less:
• I=Pα/(A×B×106) Eq. (1)
• where I represents the surface tension index (N/m) of the toner, Pa represents a capillary pressure (N/m2) of the toner for the 45-vol % aqueous solution of methanol, A represents a specific surface area (m2/g) of the toner, and B represents a true density (g/cm3) of the toner.