An inkjet cartridge is a replaceable component of an ink jet printer that contains the ink (and sometimes the print-head itself) that is spread on paper during printing. Inkjet printers operate by propelling variably-sized droplets of liquid or molten material (ink) onto almost any sized page. They are the most common type of computer printer for the general consumer due to their low cost, high quality of output, capability of printing in different colors, and ease of use.

One of the largest expensese in office stationary and supplier are the inkjet cartridges themselves. It does not matter what type of business you are in - there is always an endless supply of documents that you need to print. Even when you try really hard to reduce your carbon emissions by only printing what is absolutely necessary - there still seems to be an endless set of printing tasks each day: Letters, invoices, agenda, reports, proposals, technical drawings, memos, payslips, offical documentation and so on. If you want to start saving money they you need to look around at the different alternatives for buying inkjet cartridges including online.

Types of the inkjet cartridge

  • Thermal Inkjets: Most consumer inkjet printers, such as Canon, HP, and Lexmark (but not Epson printers) use a thermal inkjet; inside each partition of the ink reservoir is a heating element with a tiny metal plate or resistor. In response to a signal given by the printer, a tiny current flows through the metal or resistor making it warm up, and the ink immediately surrounding the heated plate is vapourised into a tiny air bubble inside the nozzle. As a consequence, the total volume of the ink exceeds that of the nozzle. An ink droplet is forced out of the cartridge nozzle onto the paper. This process takes a matter of milliseconds.
  • Piezoelectric Inkjets: All Epson printers use a piezoelectric crystal in each nozzle instead of a heating element. When current is applied, the crystal changes shape or size, forcing a droplet of ink from the nozzle. A piezoelectric inkjet allows a wider variety of inks in a much finer quality than thermal inkjets, while more economical in ink usage.

The ink also acts as a coolant to protect the metal-plate heating elements: when the ink supply is depleted, and printing is attempted, the heating elements in thermal cartridges often burn out, permanently damaging the print head. When the ink first begins to run thin, the cartridge should be refilled or replaced, to avoid over-heating damage to the print-head; see more at: inkjet printer

While printers are not generally considered dangerous pieces of equipment (compared to TV, monitors, and microwave ovens, at least), some types - laser printers in particular - present a variety of hazards that should not be underestimated. In addition, photocopiers - particularly larger high speed machines - need to be treated with great respect while servicing.

Before we walk you through the process of changing an ink cartridge, it's important to note that for safety reasons, you should unplug your printer if you plan on working inside the device for any reason other than to simply change an ink cartridge. In addition to the electrical hazard, printers also can be very hot inside, so use caution.

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