A black toner of toner particles including at least one binder, at least
one black colorant, and a package of external additives is described,
wherein the at least one binder includes a styrene acrylate binder and
wherein the external additives include each of a first silica having an
average particle size of from about 35 to about 45 nm, a second silica
having an average particle size of from about 135 to about 160 nm, and a
titania having an average particle size of from about 35 to about 45 nm.
Also described is a developer that includes the black toner and carrier
particles comprising a core of ferrite coated with a coating comprising a
polymethyl methacrylate polymer and fluoro-copolymer, carbon black and
melamine beads. The black toner and developer are preferably used in a
semiconductive magnetic brush development system.