Thanks for the pages.
I don't possess any sort of densitometer so can't measure Dmax/Dmin. However I did sayBy eye, perhaps V/VI at bestUnexposed and developed in an ordinary print developer (Fotospeed DV10) it doesn't begin to show any development for about a minute, and takes about 5 to come to a medium-grey. It doesn't develop anywhere near to a full black.
Exposed, developed and fixed it is white but not pure white (perhaps IX) and retains a slight pink tinge.
@jnanian -- ha! yes, I considered developing it in caffenol at first but thought I'd better try it in more traditional chemicals first I don 't eat many onions though ...
My main thought was to use it in my 5x4 pinhole, so I've cut some and loaded a couple of backs.