Patent ID: 7288353
Filing Date: 2007-10-30
Classification: G03G

Abstract:
1. A toner comprising: toner particles comprising: an inorganic particulate material disposed on a surface of the toner particles, wherein the toner particles have a surface roughness of between 1 and 30 nm, a standard deviation of the surface roughness of between 10 and 90 nm and include 1 to 20 convexities per 1 μm having a height not less than 10 nm, and include a convexity having a vertical interval not less than 10 nm between a bottom of a concavity and a top of the convexity between 1 and 20 pieces/μm in number, wherein the toner has an average circularity of between 0.93 and 1.00, and wherein the toner has a shape factor of between 100 and 140 and a ratio of the surface roughness to the shape factor of between 0.007 and 0.30.