Yeah, been there, done that! I've got a full sheet of Dura-lar soaking now.Now we only need a test with a real emulsion. Water beading test is the first step, coating gelatin with coloring and testing in water is a better one, but a silver gelatin emulsion may behave differently still. I had a case when I was testing acetate subbing formula that it worked for test coating with gelatin and color, "developed" in solution of sodium carbonate for 10 minutes or so, but it didn't work with real emulsion at all.
PE, you bet! I have no desire to lose my hide!