Purity testing

[Zeiton]

One way of testing the purity of blow is to touch it w a finger and it should disolve right away. How reliable is this method?
Thank you.

 

[testerpester]

That is not an accurate measure of cocaine’s purity.

 

[falsifiedhypothesi]

I would rate this method about as good as hiring a fortune teller to divine the purity with a crystal ball. There are countless substance that could dissolve into your skin like this.