6 Color White Ink Management System
This system is default for L1800's, but it can be adjusted to fit any 6 color printer by replacing the dampers with elbows and sleeves to plug into cartridges for your printer.
The system includes 5x tanks : 1 for each CMYK and 1 large white. The white has a mixing system to continuously stir the white to prevent separating. Also, there is a button to press to cycle the ink. It will pull the ink out of the lines and replace with fresh ink.