Wax is reported as being the purest cannabis product available, at anywhere between 82% and 99.7% pure THC, making it several times more potent than the buds of the cannabis plant that are usually consumed (5% -28%) One hit of wax, a minuscule amount (about the size of the head of a pin), is supposedly equal to 1-2 full marijuana joints. 1. Oven weight-loss method: Take sample of 3g to place in an aluminum weighing dish with a diameter of 50mm, bake it in the oven of 220 ℃ for 20min, then cool to room temperature to measure the weight loss rate. 2. TGA method: Take sample of 5mg to place in the TGA, increase the temperature to 220 ℃ at rate of 20 ℃ /min and keep the.