There are dozens of different printers in Lexmark’s X line, and they vary widely. The X543DN, for example, is a laser printer for which you would buy toner, not ink cartridges. Even the X-series printers that use inkjet technology are not uniform. Within the X line, certain models use certain ink cartridges, and they aren’t interchangeable. You need to know the exact cartridge numbers that fit the printer in your office.
Find Your Cartridge Numbers – The cartridge numbers are marked on the cartridges themselves and on their packaging. You can also locate these numbers through Lexmark’s own “Ink/Toner and Supplies” online store (see Resources). Choose your printer type (inkjet) and printer model (for example, X2500) from the pull-down menus provided and click “Find.” The results show that, among others, the X2500 printer takes the No. 28A black and the No. 29A color cartridges (see Resources).
Individual vs. Tri-Color Cartridges – Some models that require individual color cartridges: black, cyan, yellow and magenta. If your printer requires four separate cartridges, the cartridges will be sold as, for example, No. 100XL Black, No. 100XL Cyan, No. 100 XL Yellow and No. 100XL Magenta. Otherwise, you’ll see cartridges listed “black” and cartridges listed simply “color” that match your cartridge numbers (see Resources).
Twin and Combination Packs – The Lexmark X2500 can also use the Twin Pack No. 32 black cartridge. The No. 28A cartridge is listed at $28.69, but the Twin Pack No. 32 is $52.99, a savings of $4.39 below the $57.38 you would pay for two single No. 28A cartridges (prices as of March 2013). There is also a combination pack: the No. 34XL, 35XL black and color package gives you one black and one color cartridge.