| abstract |
PROBLEM TO BE SOLVED To solve the problem of the present invention that both the suppression of contamination of a fixing member and low temperature fixing property, which are likely to occur when using a printer which is expected to be used in various usage situations. In a toner containing at least a binder resin, a release agent A, and a release agent B, The release agent A is a tetrafunctional to hexafunctional ester compound having a number average molecular weight of 1300 or more, and the release agent B is a monofunctional or bifunctional ester compound having a number average molecular weight of 1000 or less. In the master curve of the toner at 120 ° C. as the reference temperature, the activation energy obtained from the shift factor aT at that time is defined as Ea (kJ / mol), and the toner is extracted with Soxhlet extraction with tetrahydrofuran (THF). A toner satisfying the following formula (1) when a THF-insoluble component derived from a component of a resin is contained in S%. Ea ≦ 5.0 × S (Formula 1) [Selection figure] None |