Laser printers are becoming increasingly popular among home and business users due to their ability to print faster than an inkjet printer. Laser printers might be more expensive, but the cost of maintenance is lower than inkjet printers.
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In color laser printers, the developing process is repeated four times, once for each color (cyan, magenta, yellow, black).
With inkjet printers, the liquid ink is absorbed into the paper once it hits the paper. But toner is a powdery substance so there is nothing holding it to the paper but the electric charge. To set the image to the paper, the paper is passed through the fuser. With the heat and pressure of the fuser, the toner is "melted" into the fibers of the paper.
To prepare for the next page, soft plastic blades wipe off any excess toner left on the drum. The drum then passes through the discharge lamp to "erase" any electrical charge left on the drum. To begin the process again, the drum is recharged by the corona wire.