Epson XXL Ink Supply Unit WF-C879R ink cartridge, cyan, 50,000 pages

According to the manufacturer, the page yield of this unit is 50,000 pages. For comparison, that is roughly 100 reams of 500 sheets. The more pages a single unit delivers, the less often someone has to stop the printer, fit a new unit and dispose of the empty one. Actual results depend on how much ink each page uses.

Cyan is one of the base colours of a colour printer. Mixed with magenta it gives blues and purples, mixed with yellow it gives greens, so cyan is involved in most colour charts, logos and photos, even where no pure cyan is visible on the page. Because the unit holds a single colour, it is replaced when cyan runs out while the other colours keep working.

The supplier data does not include a separate list of compatible printers for this unit. The supplier uses the product name WorkForce Pro WF-C879R, which points to an Epson printer, but it is no substitute for an exact model list. Before fitting it, check your printer manual or display for the ink unit it requires and compare that with the product name.

The manufacturer is listed as Epson itself, so this is a supply made by the printer maker rather than a third-party compatible cartridge. For anyone running a large printer fleet that keeps procurement simple: one manufacturer, a clear product name, a colour and a page yield that make it easy to work out how many spare units a year you need.

Offices and departments running an Epson WorkForce Pro series printer that print thousands of pages a month. Also office managers or IT support staff who keep supplies in reserve so the printer never stands idle, and any team that prefers a large ink unit and fewer changes over a stream of small cartridges.