MAGNETIC ONE-COMPONENT DEVELOPER

摘要

PURPOSE: To prevent the falling of fine silica particles on the surfaces of toner matrix particles and to obtain a magnetic one-component developer having satisfactory flowability. CONSTITUTION: This magnetic one-component developer consists essentially of toner matrix particles contg. magnetic powder, a bonding resin and a colorant, 1st fine silica particles fixed on the surfaces of the toner matrix particles and 2nd fine silica particles stuck to the surfaces of the toner matrix particles and/or the 1st fine silica particles. The amt. of the 1st fine silica particles is 17-40wt.% of the total amt. of the 1st and 2nd fine silica particles.