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LBGE since June 2012
Alcohol is hygroscopic by nature and can seldom be found in it's pure 100% state. That is why grain alcohol (Everclear) is listed as 190 proof, 95% pure. Just opening the cap on a bottle and pouring some out will allow moisture from the air that replaces the alcohol to be naturally absorbed.
Is there any issue with bone black or whatever the denaturing material that is used today being a contaminant?
My buddy told me that if you ask the pharmacist for 100% alcohol, he/she will give it to you without a prescription.