TONER FOR TONER RECYCLE SYSTEM, METHOD FOR MANUFACTURING THE SAME AND METHOD FOR TONER RECYCLE DEVELOPMENT

摘要

PROBLEM TO BE SOLVED: To provide a toner which can prevent degradation of image characteristics, contamination of a photoreceptor and image error, and to provide a method for manufacturing the toner and a method for toner recycle development. SOLUTION: The toner for a toner recycle system is prepared by depositing silica containing, by weight, =1.0% particles having =25 μm particle size by 0.4 to 1.0 wt.% to the weight of the toner mother particles on the surface of the toner mother particles, and the apparent density C of the toner is 0.29 to 0.32 g/ml. The toner mother particles are subjected to as first stage of deposition of the silica by using =50 wt.% to 100 wt.% of the whole silica amount to be added and then to a second stage pf deposition of the residual silica. The apparent density A (g/ml) of the toner mother particles not treated by the deposition of silica and the apparent density B of the toner mother particles treated by the deposition of silica in the first stage satisfy the relation of 0.9=B/A=1.0.