NUsolutions NUbis is a unique proprietary Bulk Ink System engineered to ensure a continuous supply of ink to the Epson® DX™4, DX5, DX6 and DX7 print heads. It allows more efficient printing with uninterrupted refilling, giving the functionality of a cartridge but with the advantages of a bulk system. The NUbis system holds degassed pouches in multiples of 2, which are easy to replace when empty, even during printing without disrupting the print session. Degassed pouches are generally more efficient especially when printing at high speeds and as such are more reliable than any conventional open bulk ink system. Replacing pouches can be done quickly and cleanly: The system connecter needles attaches easily to the nozzle of the pouch for a fast, spill-free refilling process, reducing ink wastage.