My set of two 4"x5" Autochrome plates arrived in the mail today. I washed the emulsion off of one of them, to see the starch mask. The first thing that struck me was how easily the emulsion washed off of the plate; with some warm water and rubbing, it detached very easily. So anyway, the screen plate is very interesting. It has a very easily visible random set of grains, and has a reddish-purple-gray look to it; it is NOT quite neutral. The plate almost looks like it was done on an inkjet printer; it is perfectly smooth, though vertical lines are visible on it. The plate is translucent; it is quite far from transparent, so that answers one of my questions. I'm going to try to coat it with some liquid emulsion; I know that this isn't going to give great results (no red), but we'll see.