Patent ID: 6340549
Filing Date: 2002-01-22
Classification: G03G

Abstract:
A toner for the development of an electrostatic image comprising:toner particles containing a binder resin and a colorant, and additive, said additive being agglomerated particles, wherein said agglomerated particles are made of (i) a particulate resin alone, (ii) a particulate lubricant alone or (iii) at least two particulate materials selected from the group consisting of particulate resin, particulate lubricant and inorganic particulate material, and have a shape factor of 130 or more as represented by the following equation and a volume-average particle diameter of from 0.5 &mgr;m to 10 &mgr;m: Shape factor=(ML2/A)Ã—(&pgr;/4)Ã—100 wherein ML represents the absolute maximum length of agglomerated particles, and A represents the projected area of agglomerated particles.