| 摘要 |
A toner includes toner particles and an inorganic fine powder mixed with the toner particles. The toner particles contain a binder resin, a coloring agent, a releasing agent, and a sulfur-containing resin. The toner particles contain at least one element selected from the group consisting of magnesium, calcium, barium, zinc, aluminum, and phosphorus and satisfy the relationship: <?in-line-formulae description="In-line Formulae" end="lead"?>4<=T/S<=30<?in-line-formulae description="In-line Formulae" end="tail"?> wherein T represents the total content of the element in ppm, and S represents the content of sulfur in ppm. The weight-average particle diameter (D 4 ) of the toner is in the range of 3 to 10 mum. The average circularity of the toner is within the range of 0.950 to 0.995.
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