Toner is a powder commonly used in photocopiers and Laser printers to draw images and text onto paper. The early forms of toner were just carbon powder. Modern toners mix carbon with a thermoplastic and other materials.
In early machines, the user had to pour the toner into a reservoir on the machine itself. Current machines feed from a sealed cartridge which is normally a proprietary design. Although manufacturers try to make the process complicated, empty cartridges are sometimes refilled by third-party vendors.Toner particles are melted by the heat of the fuser, and bind to the paper.
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