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Toner is a fine powdered substance used in laser printing and photocopying. Unlike ink, which is a liquid, toner is made from tiny particles that, when heated, bond to paper to create a printed image or text. The toner powder is generally made up of plastic polymers, carbon, iron oxide, and various other materials. The precise formulation of these elements ensures the powder has the right electrical properties to be attracted to a drum or belt in the printer.