The shade is supposed to be B67, it sure ain't now! I'm curious if anyone has encountered an agent which produces this effect before. Sorry about the picture quality. Oh, and ignore the incisal and ip of 8&9, that's an old repair (not mine!) with Jet d4(wha?!) The setup pic is from the originating lab, I'm replacing the anteriors. If I'm guessing the origin lab correctly, and it's a high probability, the teeth are Myerson's Kennison line. I do know it isn't Lysterine, you can smell that stuff for a mile. I don't have any more information to troubleshoot this either.