NEGATIVELY CHARGEABLE TONER FOR ELECTROSTATIC PHOTOGRAPHY
PURPOSE:To enable a toner to have good negative chargeability even at the time of successively copying of a large amount by using a carbon black having an active hydrogen content of 15.0X10 - 30.0X10mol/g in the surface as a colorant. CONSTITUTION:The toner to be used is prepared by mixing a resin,...
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