Well, I didn't know that. Does that mean that if I use 190 proof grain alcohol when I apply shellac, say, to soundboards prior to varnishing, that it will be less likely to raise grain (no pun intended)? Is there any down side to using it for that? David Love ----- Original Message ----- From: <A440A@AOL.COM> To: <pianotech@ptg.org> Sent: September 04, 2001 3:11 PM Subject: Re: hammer juice > David asks: > >Why use grain alcohol that has some water in it and would seem to have > >some > >counterproductive properties Why not use denatured, or does it have water > >in it too? > > Greetings, > The "denatured" aspect of alcohol is related to the poisonous additive, > which allows it to be sold without the liquor tax. This type of alcohol is, > if I rememberr my high school chemistry class, is commonly about 40% water. > The grain alcohol sold at the liquor store is 190 proof, which is 95% > alcohol. If you try to take it to the purest state of 100%, it will break > down into water/alcohol mix of about 95%. Which is enough to make it dry. > Anhydrous alcohol is difficult to keep that way, i think it takes a very > low temperature. > Regards, > Ed Foote >
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