A toner cartridge in a laser printer is a consumable part that contains toner powder, a fine mixture of plastic, carbon and pigment particles used to create the image on the paper. Laser printers use this powder instead of liquid ink, transferring it to paper via an electrostatically charged drum and fusing it on with heat.
LaserJet is a line of laser printers sold by HP Inc. (originally Hewlett-Packard) since 1984. The LaserJet was the world's first commercially successful laser printer. The toner cartridge contains a powder that gives laser printers great precision and control at higher speeds
