| abstract |
A developer for developing electrostatic images, comprising a non-magnetic toner, the toner containing 17 - 60 % by number of non-magnetic toner particles of 5 microns or smaller, containing 1 - 30 % by number of non-magnetic toner particles of 8 - 12.7 microns, and containing 2.0 % by volume or less of non-magnetic toner particles of 16 microns or larger; wherein the non-magnetic toner has a volume-average particle size of 4 - 10 microns, and the non-magnetic toner particles of 5 microns or smaller have a particle size distribution satisfying the following formula: nN/V = -0.04N + k, nwherein N denotes % by number of non-magnetic toner particles of 5 microns or smaller, V denotes % by volume of non-magnetic toner particles of 5 microns or smaller, k denotes a positive number of 4.5 - 6.5, and N denotes a positive number of 17 - 60. |