| 摘要 |
PURPOSE:To prevent fogging and to uniformize image quality by treating a colorant with a metal salt of carboxylic acid having a melting point of 70-250 deg.C to incorporate the metal salt in the surfaces of the colorant particles. CONSTITUTION:The colorant of the toner composed of a resin and the colorant to be used for developing an electrostatic charge image is treated with a metal salt of carboxylic acid having a melting point of 70-250 deg.C, preferably, 100-200 deg.C to incorporate the metal salt in the surfaces of the colorant particles in an amount of 0.5-20wt%, preferably, 1-15wt%. The colorant, preferably, such as carbon black, is used in an amount of 1-25wt%, preferably, 2-15wt% of the resin, thus permitting the obtained toner to be prevented from fogging or the like, uniform in image quality, improved in retentivity of copying density and the like, and high in durability even at the time of repeated uses. |
