I could find neither reference nor reaction to Richard's site or work subsequent to his current article on Lu-La (sorry, Michael, just a short-cut) regarding carbon inks for black/white digital printing; I'd have imagined that even a brief peek into his world of pictures would have started some discussion in this space. Could be that I've just failed to find it, but I want to say: here, at last, that rare thing, a teacher who can also do.
Ciao - Rob C