ONE COMPONENT MAGNETIC DEVELOPING AND IMAGE FORMING METHOD

摘要

PURPOSE:To provide an one component magnetic developer capable of forming an image with high resolution and high precision reproducibility. CONSTITUTION:The one component magnet developer is obtained by adding a hydrophobic silicic acid fine powder into toner particles containing at least a binding resin, a magnetic powder and a black titanium oxide and is 4-10mum weight average particle diameter, contains 5-60 pts.wt. magnetic material and 0.2-20 pts.wt. black titanium oxide per 100 pts.wt. binding resin and is 100>=¦Qd¦>= 40muc/g in the absolute value ¦Qd¦ of two component tribo of the magnetic developer per that of iron powder.