Some guy did this to on Amphetamine-sulphate quite pure quality overhere.
The only reason to cut it to the around 70 % purity i can think off,
making it easy on the nose or as its to wet/ clumpy to snort without it?
Or its 70 % Amhetamineand the rest suphate, no chemist nor testeing facility.
Don t know, was not bout the money as it was cheap as in really cheap.
Kept him up days, i once did a mistake with a other naieve mate treating it like Coke.

dumb move
Like we had a gram, so after 1-st line 'you feel any thing' ... 'no' nother line.
Till we consumed 500 mg each, empty bag.
Its not like Coke was obvious a creeper that once going was unstoppeable.
12 hours of highspeed conversation, mobilezation. We ended in a Coffeeshop in the city.
Just as the clock said: 12 hours have past. And then a sudden drop the comedown.
Day after real bad, and we didn t even drink Booze luckily. Went home and lights out.
They after wasn t great either, finished mental and physically. So my overdose,
kept me up 14 hours max. 500 mg lets assume 50 % pure, safe side.
250 mg kept me up no longer then 12 then crashed. No intention to redose would we have another bag !