Drum-based desktop output devices constitute a class of hardware known as page printers, so called because they apply an entire page of content to paper in one pass. Unlike inkjets, which use a printhead that moves back and forth across a sheet as it inches through the printer, gradually forming an image on the page, printers with drums emit fully formed pages.
Although all page printers use drums, not all drum-based printers use toner. Both classes of page-imaging hardware are mainstays of business computing. Laser printers apply statically charged toner to a coated metal drum, creating a page image that transfers to a sheet of paper.
A heating element called a fuser melts the toner onto the surface of the paper to form a bond that resists liquids, abrasion and UV rays.
As its name implies , a monochrome laser printer's output uses only one color of toner, so it requires only one drum.
Unlike the pages it helps produce, a laser device's drum degrades with exposure to light. Color laser printers use four different toners -- cyan, magenta, yellow and black -- to produce output that can resemble press printing. One of the fundamental differences between inkjet printers and laser printers is how they operate.
Although they both produce crisp, clean text and images, how they do this is very different. Inkjet printers use small nozzles that emit ink droplets directly onto the paper. Laser printers use toner powder instead of dye or pigment-based ink. Laser printers produce electrostatically charged dots on a light-sensitive drum which attracts toner powder.
The toner is transferred to the paper and fixed by a heating process. Laser printers deliver crisp black and white and brilliant color prints. Looking for the best gift? Check out our Holiday Gift Guide! Shop now. Buy Genuine Brother Refurbished Products.
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