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An ink cartridge is a changeable component of an ink jet printer. It contains the ink that is spread on paper during printing and sometimes the print-head itself. Each ink cartridge contains one or more partitioned ink reservoirs and certain manufacturers also add electronic contacts and a chip that communicates with the printer.

The printing depends on the smooth flow of ink, which can be hindered if the ink begins to dry at the print head, as can happen when an ink level becomes low. Dried ink can be cleaned from a cartridge print head by rubbing gently with isopropyl alcohol on a swab or folded paper towel.

Often, ink cartridges are extremely expensive, so many people started to use compatible ink cartridges produced by a company other than the printer manufacturer. Depending on the company, compatible ink cartridges can sometimes be of the same quality as original cartridges and save you some money. Some people have made some modifications to the printer to allow the use of continuous ink systems. In these cases, the ink comes from external ink tanks. Another alternative is to use aftermarket inks to refill your own cartridge or take it to a local refiller.

Consumers are often surprised at the price of replacing their printer cartridges, especially when compared with that of purchasing a brand new printer. The major printer manufacturers, Hewlett Packard, Lexmark, Dell, Canon, Epson and Brother often break even or loose money selling printers, and expect to recoup their losses by selling expensive cartridges over the life span of the printer. Since much of the printer manufacturer’s profits are made up of ink and toner cartridge sales, some of these companies have taken various actions against aftermarket cartridges. Sometimes, even legal action was taken.

Many printer owners choose to refill their cartridges or buy remanufactured cartridges from third parties over buying new cartridges. This saves them a lot of money (they only have to buy the ink and a few other small raw materials) and gets them almost the same quality. A whole industry has grown up around ink cartridge refilling. Customers can find several qualities and types of refilling. However, some are safe and successful while other types can destroy the printer or produce low quality prints. Some of the options are to take the empty cartridges to refillers or remanufacturers, or buy store branded ink.

Another option is for the consumer to refill the cartridges. Instructions for most cartridges are available on the web, as well as sources who sell “bulk ink” in pints, quarts, and even gallons. This can be extremely cost effective if the consumer is a heavy user of cartridges. One pint (473 ml) is sufficient ink to fill approximately 15 to 17 large cartridges of a typical 27 ml capacity. At the price of an original cartridge, you can buy at least one pint of ink.

Brother, Canon, Dell, HP, and Lexmark cartridges ink cartridges are very easy to refill manually. By using a simple syringe, you can fill some of them. All you need is ink. However, Epson cartridges are usually hard to refill and need a chip resetter. This tool resets the counter chip inside the cartridge. Refilling process can be messy as it involves handling ink directly. Some experience is needed to make the process as clean as possible.

Laser/toner cartridges sold as “compatible” are usually re-filled cartridges, although many third-party newly manufactured cartridges exist. Inkjet cartridges sold as “compatible” are newly manufactured cartridges. Inkjet cartridges sold as “remanufactured” are cartridges that have been used at least once by a consumer and then refilled by a third party. Note that used cartridges might not work as expected.