摘要:
A developing powder for electrophotography comprising toner particles coated with a non-volatile substance such as silicone oil, Teflon oil or liquid paraffin which is liquid at normal temperature. The volume resistivity of said liquid substance is above 1 X 1012 Omega cm. and the viscosity is below 1,000 cs. Less than 10 percent by weight of said liquid substance is applied to the toner particles.