Toner, method of preparing the toner and apparatus for preparing the toner

摘要

A method of preparing a permanently-charged electret toner, including discharging a solution or dispersion comprising a resin and a colorant through a nozzle vibrating at a constant frequency to form a droplet; applying a direct potential to an electrode facing the nozzle to positively or negatively charge the droplet by an induction phenomenon to form a charged droplet; and drying and solidifying the charged droplet to be permanently charged.