Patent ID: 7160663

Claim:
A toner comprising: (a) toner particles comprising a binder resin, a coloring agent, a releasing agent, and a sulfur-containing resin; and (b) an inorganic fine powder mixed with the toner particles, wherein i) the toner particles contain at least one element selected from the group consisting of magnesium, calcium, barium, zinc, aluminum, and phosphorous and satisfy the relationship: 4 ≦T/S≦ 30 wherein T is from 100 to 1,000 ppm and represents the total content of said element, and S represents the sulfur content in terms of ppm; ii) the weight-average particle diameter (D 4 ) of the toner is in the range of 3 to 10 μm; and iii) the average circularity of the toner is within the range of 0.950 to 0.995.