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The performance of a printer cartridge needs to be measured by parameters like: [6] mechanism of printing (toner and ink-jet) which impacts the resolution and print-rate, print quality, the percentage of useful pages (standard required e.g. business use) printed by the cartridge. page yield (number of pages printed per cartridge)
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]
The message is encountered when printing on older HP LaserJet printers such as the LaserJet II, III, and 4 series. It means that the printer is trying to print a document that needs "Letter size" (8½ × 11 in.) paper when no such paper is available. [3] Early LaserJet models used a two-character display for all status messages. This printer is ...
All printer suppliers produce their own type of ink cartridges. Cartridges for different printers are often incompatible — either physically or electrically. Some manufacturers incorporate the printer's head into the cartridge (examples include HP, Dell, and Lexmark), while others such as Epson keep the print head a part of the printer itself.
Manufacturers of printers or devices that use colour ink jet technology are meant to abide by this standard when testing for, and labeling the estimated yields of their products. The testing focused on sampling yields generated from typical business consumer printing applications.
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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 used to print the document.
Laser head from HP LaserJet 5L printer. Most HP LaserJet printers employ xerographic laser-marking engines sourced from the Japanese company Canon.Due to a tight turnaround schedule on the first LaserJet, HP elected to use the controller already developed by Canon for the CX engine in the first LaserJet. [6]