Awesome Bill, thanks much.

I have the abovementioned polaroid halftone screen (also relatively course), but I have yet to figure out a way to actually utilize it in my camera. With this thing, I can just do it on my baseboard. Great!

Ok, now just to be sure.... you place this in contact with a senstive film and then project a negative onto that sandwich(?) At first I was thinking that maybe you could stack all 3 elements; sensitive film / half-tone screen / negative <--- light source and contact print it.

Or would both ways be effective?

This press stuff is still a bit of a mystery to me... I thought that a certain degree of separation (1/16th" for instance) was necessary in half-toning.