Patent ID: 6479204
Filing Date: 2002-11-12
Classification: G03G

Abstract:
A magnetic toner with a negative polarity for developing latent electrostatic images, comprising toner particles, each toner particle comprising a binder resin, a magnetic powder, and a charge control agent, the surface of said magnetic toner satisfying the relationship of:2Ã—10âˆ’7&lE;C/Sw&lE;10Ã—10âˆ’7, provided C&lE;8Ã—10âˆ’3, wherein C is an amount (g/g) of said charge control agent dissolved in a solvent comprising water and methanol per unit amount (g) of said toner particles, and Sw is a specific surface area (cm2/cm3) of said toner particles determined from a weight-average particle diameter of said toner particles.