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HP class action suit, it was claimed that Hewlett-Packard designed certain inkjet printers and cartridges to shut down on an undisclosed expiration date, and at this point customers were prevented from using the ink that remained in the expired cartridge. HP denied these claims, but agreed to discontinue the use of certain messages, and to make ...
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.
A Hewlett-Packard laser toner cartridge. A toner cartridge, also called laser toner, is the consumable component of a laser printer.Toner cartridges contain toner powder, a fine, dry mixture of plastic particles, carbon, and black or other coloring agents that make the actual image on the paper.