Development method with controlled toner density

摘要

A target specified range of a toner density is correctly set so that a toner density is consistently appropriately controlled. If a specified range within which a measured toner density TD (%) should fall is set based on an expression (2) below using a volume average diameter Dcav_vol (mum) of a magnetic carrier and a volume average diameter Dtav_vol (mum) of a toner, the target specified range can be correctly set, thereby making it possible to consistently appropriately control the toner density. <?in-line-formulae description="In-line Formulae" end="lead"?>TD<={gammat.Vt/Nt/(gammac.Vc)}x100 (2)<?in-line-formulae description="In-line Formulae" end="tail"?>