Xerox Corporation

Shigang S Qui

Vladislav Skorokhod

Edward Graham Zwartz

Richard P N Veregin

Karen Ann Moffat

Daryl Walter Vanbesien

Michael D Thompson

Juan A Morales-Tirado

Deepak R Maniar

William H Hollenbaugh, Jr

Emily Louise Moore

Paul Windsor Morehouse, Jr

Thomas C Dombroski

Christopher M Pattison

Jackie B Parker

Mary L Mc Stravick

Rachael L Mc Grath

Maria N V Mc Dougall

Mary B Schlitzer

A toner composition having toner particles comprising a gel latex, a high Tg latex, a wax, and a colorant. The gel latex is present in an amount of from about 3 weight percent to about 30 weight percent of the toner composition, the high Tg latex is present in an amount of from about 50 weight percent to about 95 weight percent of the toner composition, the wax is present in an amount of from about 2 weight percent to about 40 weight percent of the toner composition, and the colorant is present in an amount of from about 1 weight percent to about 25 weight percent of the toner composition.

Toner compositions

A developer includes black toner particles and carrier particles, the black toner particles including at least one binder, at least one black colorant and one or more external additives, wherein the toner particles comprise from about 7 to about 15 pph of the developer, and wherein the toner particles exhibit a triboelectric charge of from about &#x2212;25 to about &#x2212;50 &#x3bc;C/g at toner particle concentrations of about 7 to about 15 pph of the developer. The developer is ideally suited for use in a high speed (greater than 100 prints per minute) semiconductive magnetic brush development apparatus. Preferably, the black toner particles include a styrene acrylate binder, and the external additives include from about 1.3 to about 2.1% by weight of the toner particles of a first silica having an average particle size of from about 35 to about 45 nm, from about 0.5 to about 1.0% by weight of the toner particles of a second silica having an average particle size of from about 135 to about 160 nm, and from about 0.2 to about 0.5% by weight of the toner particles of a titania having an average particle size of from about 35 to about 45 nm, with an external additive toner surface area coverage of from about 25 to about 45%.

Black toner and developer

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Etobicoke, Canada

Shigang S Qui