I tried using a bottle of black/red Noodlers fountain pen ink (water based) and the PR took two days to harden, and I am afraid to turn it b/c it's hard but brittle, and the luster pigments seemed to have all settled to the bottom.
Give it a shot but I'd only spend it on one blank at the moment to see what happens.
As a side note, it makes a GREAT colorant for ebonizing wood (if it's black ink). Oak with black dye looks great after a coat or two of satin polyurethane.