The Epson T1624 yellow ink cartridge is filled with Epson’ DURABrite ink. The ink in this particular set of “Pen and Crossword” ink cartridges is an all-pigment ink system that is capable of producing documents in incredibly fine detail. Once printed, the T1624 yellow ink dries very quickly, is resistant to smudging and is slow to fade. This yellow ink cartridge can be bought separately or, if you require more than just a yellow ink you can buy the Epson T1626 Multipack that contains the full set of Pen and Crossword cartridges.