![]() You'll find two types of printers for sale. Mono mode, if available, may be able to be used indefinitely to save on colour ink usage if the colour cartridges are not empty. However, this may be allowed only for a limited time, as printing without ink can suck air and grit into the empty cartridge and risk damaging the print heads. Inkjet models may also allow you to temporarily print using black-only (mono) mode even when a colour cartridge is empty. ![]() ![]() Check with your printer's instruction manual first, as the function varies from brand to brand and model to model. Laser printers with a dedicated "mono mode" will usually allow you to continue to print until black toner runs out. This is because many colour printers mix in a little colour ink/toner even to print black text (which makes the black look 'richer'). Most colour printers will stop working when one of the ink/toner cartridges runs out, even if you just want to print with black only (sometimes called 'mono' mode).
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