Laser printers work by projecting a unique electrostatic charge against a printing drum. Usually stored in a single cartridge, printer toner is a powder-based print medium made from granulated plastics that allows for greater accuracy and control.
Toner powder is collected and then transferred to paper by the charged printing drum. As a final step, the paper is heated to melt the toner particles and help make sure that your print sets properly.
The drum’s electrostatic charge is imprinted by lasers, hence the term “laser printer.” While laser printing mostly involves black-and-white prints, you can find color options with the four-cartridge configuration.