Quote from: jpinkman on February 23, 2013, 04:41 pmYou also want to be sure your oven has adequate ventilation else you risk the vapors just recrystallizing in the container because they have nowhere to go. :( Pardon my impudence, professor, but if I may request clarification: if you don't prematurely turn off the heat, I don't think this is possible. If it vaporizes in the first place, unless it somehow loses enough energy (i.e. heat) to change phase again & no longer be a gas, doesn't it have to stay vaporized...?