I'm always on the lookout for unusual film stocks, and FPP X-ray is something I want to test very soon. However... looking over the description they have on their site, and the description film washi has on its data sheet for F, I've come to start thinking, is this really just the same film? FPP sells Washi film, but not Washi F, and it's not uncommon for them to repackage unusual films under their own brand. so I was wondering, if anybody's tried both films and if they could confirm my suspicions.
