Lasers
. A Xerox machine (or photocopier) is a device that makes rapid, inexpensive paper copies of documents and visual images. While "Xerox" is technically a registered brand name, the term became a universally used eponym to describe any machine that uses dry xerography to duplicate pages.How it WorksMost traditional photocopiers and laser printers rely on xerography, a dry process that involves:Charging: An electrostatic charge is applied to a light-sensitive photoreceptor.Exposing: Light reflects off the original document and hits the photoreceptor, discharging the areas with text or images and leaving a latent "image" of charge.Developing: Toner (a resinous colored powder) is applied to the photoreceptor and clings to the charged (unlit) areas.Transferring & Fusing: The toner is transferred onto a blank sheet of paper and permanently bonded to it using heat and pressure.Modern EvolutionToday, the definition of a Xerox machine has expanded. While the original mac...