Two-component development systems using magnetic carriers and tribocharged toner particles are well established in electrophotography for high-quality development of electrostatic latent images at high speed. Two main approaches are used for these systems: development utilizing fixed magnets within a rotating developer roller, or development with a moving magnetic field, usually produced by a developer roller with a rotating magnetic core as well as a rotating outer surface or shell. The magnetic field from the rotating magnetic core provides a large amount of kinetic energy to the carrier and the toner particles moving toward the electrostatic latent image. Development to completion has been obtained with a rotating magnetic core development system. Completion is characterized by proportionality between the cube of the toner-charge-to-mass ratio, Q/m, and the voltage to completion, Vc, which is the difference between the developer bias and the voltage of the developed image.