With a jumbo ink supply, you'll be able to use it year after year. (styleathome.com)
E Ink supplies not just the E Ink layer itself - the display panel also includes moisture protection, UV protection, hardness coating, Oleophobic coating, anti - glare / anti-reflective and more. (e-ink-info.com)
Competitive printers don't offer pigment ink at all or can only use one type of ink due to the complex procedures required to purge ink supply lines and change out a fixed print head. (primeralabel.eu)