Patent ID: 7323280

Claim:
A toner for developing an electrostatic image comprising toner particles which include a binder resin, a wax and a colorant, wherein the wax has a melting point of between 50 and 150° C., and the wax exists in the toner particles in domains of 2 μm or less mean particle size and wherein (a) the mean circularity of the toner particles as measured by a Flow Particle Image Analyser is at least 0.90; and (b) the shape factor, SF1, of the toner particles is in the range from 130 to 150; and wherein the binder resin is prepared from at least one latex containing a resin having a monomodal molecular weight distribution and at least one latex containing a resin having a bimodal molecular weight distribution, and (c) the ratio SF1/SF2 of the shape factor, SF1, to the shape factor, SF2, is from 1.07 to 1.13.