Chris Todd , Apr 18, 2002; 09:42 p.m.
They actually are two different things. Release paper is almost like wax paper (without wax). You use it between the tacking iron and the adhesive to keep any glue from sticking to the iron (at least I use it that way). You still have to be careful not to get adhesive on the print. A cover sheet goes against the print surface when you actually squish the thing in the press. It keeps the texture of any boards in there from being impressed into the print, and keeps the print from generally getting messed up by the heat when against another surface. When I tack a print to it's board, I use a cover sheet against the print to keep the iron from leaving marks then as well. So, what that all sums up to is: release paper is used against the adhesive side, while a cover sheet is to protect the print. Of the two, the cover sheet is the more important. I suspect there are other substitutes for the release paper. Anything that the adhesive won't stick to could be used for that, which probably also includes cover sheet stock.