INKJET PRINTERS EXPEL ink droplets from hundreds of tiny jets, or nozzles, on to a medium, such as paper, to print an image. Each droplet corresponds to a single pixel (picture element). Black-and-white printers use only black ink, while color printers overprint combinations of the printing colors (cyan, yellow, magenta, and black) to create a full color range. The printhead containing the nozzles moves sideways across the paper, creating a line of pixels, before the paper moves slightly forward so the next line can be printed. Two basic methods are used to eject ink: thermal, in which ink is heated to form an expanding bubble that expels a droplet from the nozzle, and piezoelectric, in which an electric current expands a crystal causing it to push out the ink droplet. The printer shown here can print digital photographs directly from a memory card.
Inkjet printer
in
THE MODERN WORLD
published on 8:33 AM
INKJET PRINTERS EXPEL ink droplets from hundreds of tiny jets, or nozzles, on to a medium, such as paper, to print an image. Each droplet corresponds to a single pixel (picture element). Black-and-white printers use only black ink, while color printers overprint combinations of the printing colors (cyan, yellow, magenta, and black) to create a full color range. The printhead containing the nozzles moves sideways across the paper, creating a line of pixels, before the paper moves slightly forward so the next line can be printed. Two basic methods are used to eject ink: thermal, in which ink is heated to form an expanding bubble that expels a droplet from the nozzle, and piezoelectric, in which an electric current expands a crystal causing it to push out the ink droplet. The printer shown here can print digital photographs directly from a memory card.
