Install Ink CartridgeRemove the protective cover and protective film from the ink cartridge.Remove the lid of the printer. Switch open the cover lock and open the transparent cover slowly.Insert the cartridge in the ink tank. Check if it is well fitted inside. Then close the transparent cover, push the cover and lock it with the switch.   ※<Important> After using Princube, be sure to close the lid to keep the ink cartridge out of contact with the air. After removing the ink cartridge from Princube, we suggest putting the protective cover back on when not in use to protect the nozzle and ink from drying out. Remove Ink CartridgeMake sure Princube is power off.Remove the lid of the printer. Switch open the cover lock and open the transparent cover slowly.Take out the ink cartridge. Try not to touch the nozzle.Protect the ink cartridge with cover.