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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 ...
Description that the additional yield values have been determined using the procedure defined in ISO/IEC 24711 using the test page defined in ISO/IEC 19752. The value obtained was using a continuous printing procedure.
The HP DeskJet 520 introduced resolution enhancement technology, or REt, to HP inkjet printers. It was also HP's last black-and-white-only inkjet printer. The HP DeskJet 500, 510, 520, 500C, 550C, and 560C were all replaced by the HP DeskJet 540 (3 ppm B&W, 1.5 minutes per page color). A one-pen inkjet printer, color was optional.
HP categories of printers as of November 2014 are: Black and white laser printers; Color laser printers; Laser multifunction printers; Inkjet all-in-one printers; Specialty Photo inkjet printers; Business ink printers; Color inkjet printers; HP Designjet large format printers; HP Indigo Digital Presses; HP Inkjet Digital Web Press; HP latex ...
It offered 10 ppm, an HP Instant-on fuser, 600 dpi with HP REt boosting output effectively to 1200 dpi, a 2.5-cent cost per page, and a 7,000-page monthly duty cycle. In 2002, the 8150 was discontinued and was replaced by the 9000 series, which produced 50 pages per minute and used an internal duplexer.
RGB printers have three, red, green, and blue, but may also have a "true black". Some ink jet printers may have additional cartridges, for example light cyan and light magenta in addition to the others, but this is rarely found in page printers. Multi-function devices provide additional functions such as copying, scanning, or Fax. Media ...
In July 1977, Hewlett-Packard introduced the 2648A graphics terminal, a 2645A derivative which added 720×360 black-and-white raster graphics in a separate graphics page that could overlay the main text memory. [16] This was joined in May 1978 by the 2647A programmable graphics terminal, which included its own BASIC interpreter. [17]
Color printers usually have a higher cost per page than monochrome printers, even if printing monochrome-only pages. Liquid electrophotography (LEP) is a similar process used in HP Indigo presses that uses electrostatically charged ink instead of toner, and using a heated transfer roller instead of a fuser, that melts the charged ink particles ...