Patent ID: 7132207

Claim:
A toner kit comprising a non-magnetic black toner having at least carbon black, and at least three color toners, wherein said black toner has a weight-average particle diameter represented by D 4 b and a one-point method BET specific surface area represented by Sb, and the color toners, other than the black toner, each having a weight-average particle diameter represented by D 4 c and a one-point method BET specific surface area represented by Sc, wherein said black toner and color tenors satisfy the following relations (1) and (2): 0.60≦D4c/D4b ≦0.96, Relation (1): 0.750 Sc/Sb 1.000, Relation (2): and each have an average circularity of from 0.095 to 1.000 and a circularity standard deviation of less than 0.040 as measured with a flow type particle image analyzer.