That may be true, 1 1/2h into the process, the reaction kind of stopped and the temperature only decreased.
Once I poured the CuCl2 into the mix it only changed color, and it was a b*tch to keep the temperature at 80C in the end but I managed.
I started the crystalization with the sulfuric acid, but the problem was that the pH sticks kept the same color as the amphetamine oil, dark orange, didnt matter how much I poured inside, so in the end I gave up and discharged of it all.
It is not worth all of the hastle just to save up on some IPA and NaBH4.