| abstract |
(57) [Problem] To provide a toner which is hardly influenced by the environment, has stable charging performance, has no fog, has a high image density even when used for a long time, and has excellent image reproducibility. It is in. SOLUTION: The toner has toner particles containing at least a binder resin and iron oxide, and i) iron to the content (A) of a carbon element present on the toner surface measured by X-ray photoelectron spectroscopy. Element content (B) ratio (B / A) is less than 0.001, ii) the projected area equivalent diameter of the toner is C, and the minimum value of the distance between the iron oxide and the toner surface in cross-sectional observation of the toner using a transmission electron microscope (TEM) is D. Wherein the toner satisfying the relationship of D / C ≦ 0.02 is 50% by number or more, and iii) the average circularity of the toner is 0.970 or more. |