Toner and method for producing toner

A method for producing a toner comprising a toner particle comprising a binder resin, comprising the step of:

• surface-treating the toner particle with hot air to obtain a heat-treated toner particle;
• the binder resin comprising a first resin and a second resin;
• the first resin being a crystalline resin;
• the second resin being an amorphous resin;
• and
• a matrix-domain structure composed of a matrix comprising the first resin and domains comprising the second resin is present when a cross section of the toner particle is observed with a transmission electron microscope, with an area ratio occupied by the matrix in a total area of the matrix and the domains being 35 to 70 area %, wherein
• a ratio [hydrocarbon group index (Ge)]/[hydrocarbon group index (DIA)] after washing the toner with hexane is 1.10 or more,
• the hydrocarbon group index (Ge) is a value of A (Ge)/B (Ge) where A (Ge) is a maximum absorption peak intensity in a range of 2800 to 2900 cm−1 corresponding to a stretching vibration of C—H and B (Ge) is a maximum absorption peak intensity in a range of 1500 to 1800 cm−1 corresponding to a stretching vibration of C═O in an FT-IR spectrum obtained by using Ge as an ATR crystal and performing measurements by an ATR method under condition of an infrared light incident angle being 45°, and
• the hydrocarbon group index (DIA) is a value of A (DIA)/B (DIA) where A (DIA) is a maximum absorption peak intensity in a range of 2800 to 2900 cm−1 corresponding to the stretching vibration of C—H and B (DIA) is a maximum absorption peak intensity in a range of 1500 to 1800 cm−1 corresponding to the stretching vibration of C═O in an FT-IR spectrum obtained by using diamond as an ATR crystal and performing measurements by the ATR method under condition of the infrared light incident angle being 45°.