Have been looking at this stuff. Going to try it over the summer
Very slow at around iso3. They recomend you preflash the paper before hand for best results….
Have received my 4×5 film holders for my next bit of a project, just need to get the zero image box next month and hope to try it with this paper then….
Grade 3.5 to 4, so will be pretty contrasty, you can see by the pix on their site-
lots of vignetting, it won’t suit wide angles very much, unless you like a lot of black…
Might be useful for proper pictures too, you know, with lenses…
Development by inspection is a big advantage-
but you might end up shooting a few originals if you want to get experimental-