Epson WorkForce Enterprise AM-C4000 ink cartridge, yellow

Yellow is the lightest of the three base colours and rarely shows up in pure form on a page. Yet the printer needs it for nearly every warm shade: mixed with cyan it forms greens, with magenta oranges and reds. Green diagrams, sunlit photos, wood colours and warm skin tones use more yellow ink than you might think at first glance.

The supplier marks only the WorkForce Enterprise AM-C4000 as compatible, and the cartridge's product name is the same. No other printers appear in the compatibility field. The AM-C400 and WF-C21000 cartridges of the same series are separate products, so it is worth checking the model name on your printer's label carefully before you install the cartridge.

A shortage of yellow ink is usually noticed not in text but in mixed colours. Green charts turn bluish, oranges turn reddish and photos look cold. Because the yellow cartridge is separate, you can replace it as soon as a colour shift appears, without touching the cyan and magenta cartridges that still have ink left.

The cartridge's manufacturer is Epson, so this is an original consumable. The manufacturer's own ink is designed for a printer of the same brand, which helps keep colours consistent from one job to the next. The supplier does not disclose a page yield (N/A), so track consumption by the printer's ink level and plan your spare cartridge from that.

It is meant for companies running an Epson WorkForce Enterprise AM-C4000 that want to use original consumables. Keeping a yellow in reserve is especially sensible if you print many green charts, maps or photo-rich publications, since these use yellow the fastest.