Laser printing uses static electricity and a laser to graft an image onto a roller, which then attracts toner to create an exact duplicate of the image. The paper is introduced last and picks up the toner before leaving the printer.
The laser printing process is an advanced process that is much more intensive than inkjet printing, where ink is simply sprayed onto the paper. When an image is sent to a laser printer, a roller starts spinning to build up static electricity. A laser then places the image or text to be printed onto the roll, so that it is electronically grafted onto the roll. The toner is then released and the roller draws the toner into the shape of the image. The paper passes from the roller and ends the laser printing process by picking up the toner.
After the user sets up a document to print, the laser printing process begins by spinning an internal roller. This rotation causes the roller to build up static electricity, which is needed for the later parts of the laser printing process. At this stage, the reel has nothing on it; it’s just an empty piece of equipment. Another way the roller accumulates electricity is through light, because the roller is also photoconductive.
Lasers come into play next, as a laser is responsible for disrupting static electricity and then reacting with toner. The laser contains a negative electrical charge and temporarily grafts the image onto the roller. This negative charge is very important because otherwise the rest of the printing process would not work properly. This image will disappear after the laser print process is complete, allowing the roll to capture another image.
Toner, black and color, is released based on the image to be printed. For example, if a magenta image is printed, the magenta toner will be released. The toner has an opposite, or positive, charge which is attracted to the parts of the roller touched by the laser. This means that an exact duplicate of the printed image is now printed on the roll. In most cases, the toner will come off very easily.
Paper is then introduced as the last step in the laser printing process. The paper gets a negative charge as it passes through the printer, but because the charge is stronger than that on the roller, the toner lifts off the roller and onto the paper. This causes the paper to take up the image and leave the printer. After this, a strong light shines on the platen to erase the grafted image, so that a new image can be grafted onto it for the next print.
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