ELECTROPHOTOGRAPHIC TONER

摘要

PURPOSE:To keep the grain size distribution wide and the resolution high for a two-constituent developing nonmagnetic toner. CONSTITUTION:This nonmagnetic toner having the volume average grain size of 4-14mum (preferably 6-12mum) is a mixture of a small-grain size toner having a volume average grain size of (the volume average grain size)X(0.2 to 0.9) (preferably 0.4 to 0.8) and a large-grain size toner having a volume average grain size of (the volume average grain size)X(1.1 to 1.5) (preferably 1.2 to 1.4). The charged quantity for unit weight of the small-grain size toner is made 0.7 to 1.5 times (preferably 0.9 to 1.1 times) that of the large-grain size toner.