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  2. Laser printing - Wikipedia

    en.wikipedia.org/wiki/Laser_printing

    A HP color laser printer with its cartridge drawer open showing the four toner cartridges inside. Color laser printers use colored toner (dry ink), typically cyan, magenta, yellow, and black . While monochrome printers only use one laser scanner assembly, color printers often have two or more, often one for each of the four colors.

  3. HP LaserJet 4 - Wikipedia

    en.wikipedia.org/wiki/HP_LaserJet_4

    The HP LaserJet 4 (abbreviated sometimes to LJ4 or HP4) is a group of monochrome laser printers produced in the early to mid-1990s as part of the LaserJet series by Hewlett-Packard (HP). The 4 series has various models, including the standard LaserJet 4 for business use, the 4L for personal use and the 4P for small businesses. [1]

  4. HP LaserJet 4000 series - Wikipedia

    en.wikipedia.org/wiki/HP_LaserJet_4000_series

    A HP LaserJet 4000n printer. The LaserJet 4000/4050 and their respective variants were the first printers released in the 4000 series. The LaserJet 4000 series printers print letter paper at 17 pages per minute, and can be set to print at 600 dpi or 1200 dpi, although when set to print at true 1200 dpi, the printer runs at reduced speed.

  5. Xerox 2700 - Wikipedia

    en.wikipedia.org/wiki/Xerox_2700

    The Xerox 2700 is a discontinued monochrome laser printer from Xerox Corporation. The 2700 was announced in March, 1982, and can print up to 12 pages per minute (PPM), one-sided, on standard A4 or Letter cut-sheet paper. It occupies 5 square feet (0.46 m 2) of floor space, and cost $18,995 (equivalent to $59,972 in 2023).

  6. Printer tracking dots - Wikipedia

    en.wikipedia.org/wiki/Printer_tracking_dots

    Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...

  7. Printer (computing) - Wikipedia

    en.wikipedia.org/wiki/Printer_(computing)

    Printer steganography is a type of steganography – "hiding data within data" [30] – produced by color printers, including Brother, Canon, Dell, Epson, HP, IBM, Konica Minolta, Kyocera, Lanier, Lexmark, Ricoh, Toshiba and Xerox [31] brand color laser printers, where tiny yellow dots are added to each page. The dots are barely visible and ...