Split-Toning Monochrome?

[asnapper]

Below is a thread from the Inkjetmall forums which discusses Piezography custom ink mixes which some may find of interest. It also touches upon Piezography Pro which could be released one day, which will give you many split tone possibilities, though perhaps not the high fidelity of K6 & K7

http://www.inkjetmall.com/tech/showthread.php?134-custom-ink-mixes