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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 ...
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.
HP introduced the mass-market laser printer, the LaserJet series II, in March 1987. The LaserJet II was designed as a laser printer with correct order page output as opposed to being leveraged from the Canon PC-20 personal copier. [6] The LaserJet II used PCL4, improved features, more memory and fonts for a market price of $2,695. [6]
The laser printer was invented at Xerox PARC in the 1970s. Laser printers were introduced for the office and then home markets in subsequent years by IBM, Canon, Xerox, Apple, Hewlett-Packard and many others. Over the decades, quality and speed have increased as prices have decreased, and the once cutting-edge printing devices are now ubiquitous.
The Xerox Phaser 7700 Series of color laser printers use the VxWorks Operating System on its 20GB PATA IDE Hard Drive. The 7700 Series is a wide format duplex-capable laser printer capable of printing up to 12x18 page sizes. The average 8.5x11 Letter size speed is 23 pages per minute. ()
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 ...