I have been frustrated by the incomplete information of currently available BW papers and have decided to do something about it!
I have tested a limited range of papers with step wedge contact prints, then treated each in identical toners. The webpages feature an interesting pop-up for these results plus a comprehensive reference on paper components drawn from each manufacturers' website. I hope to add to the selection but will rely on the manufacturers to supply the paper, as I think I have invested enough already!
Any positive feedback through APUG is welcome eg. Photo Engineer who suggested I add characteristic curves (!) - I will try to find time for that, but it's a good idea.