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CHEMICAL TONER POWDER Toner Powder is a powder mixture used in laser printers and photocopiers to form the printed text and images on the paper, in general through a toner cartridge. Toner Powder basically must develop an electrostatic charge through friction with itself and a developer roller, then have the correct level and polarity of charge to be attracted to the image area on the photo-conductor drum, and later transfer from the drum to the paper. One of the major ingredients in modern printer consist of laser toner cartridges for laser printers is filled with magnetite. CARTRIDGE ZONE toners contain iron oxide, others do not. Additives are added to toners so they will perform acceptably over a wide range of temperature and humidity in the printer environment.