HP OfficeJet Pro 8730 User Guide - Page 105
Some color ink is used even when printing with black cartridge only, Check the estimated ink levels
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NOTE: This printer is not designed to use continuous ink systems. To resume printing, remove continuous ink system and install original HP (or compatible) cartridges. NOTE: This printer is designed for ink cartridges to be used until they are empty. Refilling cartridges prior to depletion might cause your printer to fail. If this happens, insert a new cartridge (either genuine HP or compatible) to continue printing. Related topics ● Check the estimated ink levels Some color ink is used even when printing with black cartridge only Ink is used in a number of ways throughout the inkjet printing process. In general, ink in a cartridge is used for printing documents, photographs and other such materials. Some ink, however, must be used to maintain the health of the printhead; some ink is residual; and some ink evaporates. For more information on ink usage, visit www.hp.com/go/learnaboutsupplies and click HP Ink. (You might need to select your country/region using the Select Country button on the page.) Check the estimated ink levels You can check the estimated ink levels from the printer software or from the printer control panel. To check the estimated ink levels from the printer control panel ▲ From the printer control panel, touch or swipe down the tab at the top of the screen to open the Dashboard, and then touch (Ink) to check the estimated ink levels. NOTE: Ink level alerts and indicators provide estimates for planning purposes only. When you receive a lowink alert, consider having a replacement cartridge available to avoid possible printing delays. You do not have to replace the cartridges until prompted to do so. NOTE: If you have installed a refilled or remanufactured cartridge, or a cartridge that has been used in another printer, the ink level indicator might be inaccurate or unavailable. NOTE: Ink from the cartridges is used in the printing process in a number of different ways, including in the initialization process, which prepares the printer and cartridges for printing, and in printhead servicing, which keeps print nozzles clear and ink flowing smoothly. In addition, some residual ink is left in the cartridge after it is used. For more information, see www.hp.com/go/inkusage . Replace the cartridges NOTE: For information on recycling used ink supplies, see HP inkjet supplies recycling program. If you do not already have replacement cartridges for the printer, see Order ink cartridges. NOTE: At this time, some portions of the HP web site are available in English only. NOTE: Not all cartridges are available in all countries/regions. ENWW Some color ink is used even when printing with black cartridge only 95