Patent ID: 9372424
Filing Date: 2016-06-21
CPC Classification: G03G

Claim Text:
1. A magnetic toner comprising: magnetic toner particles, each of which contains silica fine particles, wherein the magnetic toner has a thermal conductivity in the range of 0.230 to 0.270 W/(m·K), primary particles of the silica fine particles have a number-average particle diameter (D1) in the range of 5 to 20 nm, the coverage X1 of the magnetic toner surface by the silica fine particles ranges from 40% to 75% by area, as determined using an X-ray photoelectron spectrometer (ESCA), and the diffusion index represented by the following formula 1 satisfies the following formula 2: wherein X2 denotes the theoretical coverage of the magnetic toner surface by the silica fine particles.