I think I may have seen that PDF at one time, I'll see if I still have it. I think maybe I saw it mirrored somewhere.
Well, I guess I'll have to pick up a densitometer sometime...
The problem with shooting separations is it prevents me from still doing normal (Ilfochrome) prints.
If this is done as a contact method, I assume that the filter would be just placed over the lightsource? I'm mainly interested in working from 8x10 transparencies.