Hello, Today I was working in the darkroom and a photo student showed me the strangest thing. She had printed a test strip on Promaster paper and it looked fine. Then she made a print on another sheet from the same box, and nothing happened. I then took a strip of paper from a different sheet and waved it around under a skylight then tried it in working strength developer, then in stock solution. Not even the slightest fog. I think that somehow her paper was just treated with a glossy finish and never got the emulsion, because it certainly did have a glossy finish. I am extremely interested to hear what others have to say on the subject though!