| abstract |
(57) [Problem] To provide a toner having a high charge development speed and a good developing property over a long period of time in a high-speed machine even in a high-temperature and high-humidity environment. A toner containing at least a binder resin, a colorant, and an organometallic compound, wherein the organometallic compound is an azo iron compound that can be generated from a specific monoazo compound, and the binder resin of the toner is Has an acid value of 0.5 to 30 mg KOH / g and a hydroxyl value of 1 to 50 mg KOH / g, acid value (Av) and hydroxyl value (OH v) It is characterized by having a polyester resin whose ratio satisfies the following relationship: 0.05 ≦ Av / OHv ≦ 2.0. |