ELECTROSTATOGRAPHIC DEVELOPMENT WITH FERRITE DEVELOPER MATERIALS

摘要

An electrostatographic imaging process comprising forming an electrostatic latent image on a surface and developing said image by contacting it with a developer mixture of finely-divided toner particles electrostatically clinging to the surfaces of carrier beads comprising nickel-zinc ferrite beads or manganese-zinc ferrite beads characterized as being substantially dense and uniform in size and shape with maximum roundness and sphericity and having substantially uniform electrostatographic properties such as triboelectricity, magnetic permeability, and electrical conductivity, whereby at least a portion of the toner particles are attracted to and deposited on said surface in conformance to said latent image.