In a toner kit having i) a non-magnetic black toner having at least carbon
black and ii) color toners, the black toner has a weight-average particle
diameter represented by D4b and a one-point method BET specific surface
area represented by Sb, and the color toners, other than the-black toner,
each have a weight-average particle diameter represented by D4c and a
one-point method BET specific surface area represented by Sc, where the
black toner and color toners satisfy the following relations (1) and (2):
0.60.ltoreq.D4.c/D4b.ltoreq.0.96,: Relation (1)
0.750.ltoreq.Sc/Sb.ltoreq.1.000;: Relation (2) and each have an average
circularity of from 0.950 to 1.000 and a circularity standard deviation
of less than 0.040 as measured with a flow type particle image analyzer.