![]() If it's highly-cut, then this number will be about ten degrees lower by the time it's fully solid. If it's pure, this temperature should not change much at all during solidification. Pure methamphetamine should begin crystallization between 170˚C and 175˚C, and with cut methamphetamine this would happen at a lower temperature. As soon as it starts to form crystals, make a note of the temperature. A much more sinister cut is that of isopropylbenzylamine. Wait for it to all melt, then turn off the heat and start monitoring the temperature. This methamphetamine cracks back instantly, failure to crackback or a large delay indicates impure product. Crackback mania is just nonsense, there is one standard at the top and you know after smoking a bowl if that has been achieved and there are levels close but below and you know that moment too, the crackback means nothing and hasn't done since the cuts became more difficult to cook than the meth. Eventually, the stuff in the tube will melt, and when it does, insert the thermometer. Put mineral oil or cooking oil or some other clear liquid with a high boiling point in the beaker, then put the test tube in that and heat it on a stove burner or a flame or something. ![]() ![]() Put as much of the alleged drugs in the test tube as you can. Get a glass thermometer than can measure up to at least 200˚C, a test tube, and a vial or a small beaker or something, that you can put the test tube in without it falling over. ![]()
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