Howsir Epson R1800 printer partner,ink cartridge for T0540/T0541/T0542/T0543/T0544/T0545/T0546/T0547/T0548/T0549.Epson R1800 CISS is 8 colors separated. Uses like the Epson R1800 printer special-purpose ink ,which is flowing good, does not agonic color, does not block the printer mouth, has the best performance-to-price. The printing effect may compare with the original ink of the Epson R1800. A set of the Epson R1800 printer partner is equal in above original ink 10 times, reduces the printing cost greatly, and can save 90% printing cost for you. It does not need to adapt the printer, uses up one color to add one color. The printing color can compare with the original cartridge of the Epson R1800 printer. The long time printing is more stabler, does not need to maintain, you can print what you desire.