Ink cartridges or inkjet cartridges is a replaceable component of an inkjet printer that contains the ink (and sometimes the print head itself) that is spread on paper during printing.
The single biggest complaint that customers have against manufacturers of ink-jet printers and all-in-ones is the cost of consumables. While hardware prices continue to drop, the costs of ink ,paper and ink cartridges stay pretty much the same and, each year, can well add up to a good proportion of the purchase price of a machine. Ink cartridges are typically expensive, sometimes a substantial fraction of the cost of the printer. To save money, many people use compatible ink cartridges from a vendor other than the printer manufacturer.