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  1. #1
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    Technical question: Proof and barrel age?

    I've been pondering this for a long time, and this looks like the perfect place to ask.....

    Bourbon, as it ages in the barrel - some volume is lost. The portion that remains - becomes higher in proof. I have read this over and over, but it doesn't make sense to me.

    Seems it should be opposite.

    Doesn't alcohol have a higher vapor pressure than water?

  2. #2
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    Also has a larger molecule, hence the water leaves first thru the barrel.
    Joe
    Colonel Joseph B. "Bourbon Joe" Koch

    "Bourbon.....It's cheaper than therapy!!"

  3. #3
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    Quote Originally Posted by BourbonJoe
    Also has a larger molecule, hence the water leaves first thru the barrel.
    Joe
    I did think of that, like helium balloon deflating faster than a plain air filled, but I didn't think either molecule would have too much trouble.

  4. #4
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    There have been threads on this before, including posts by at least one chemist among us. I tried a search, but I couldn't come up with the right parameters.

    The "larger molecule" theory could only be true if the molecules somehow shrink in Scotland, where, as I understand it, proofs go down with age.

    Yours truly,
    Dave Morefield
    Yours truly,
    Dave Morefield

    Dog Lover, Euphonium Player, Campfire Guitarist, Marksman,

  5. #5
    Bourbonian of the Year 2010 and Guru
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    Interesting that I had just put up a link to this last night in another thread, so here's the link again.

    http://www.straightbourbon.com/ubbth...?t=4446&page=3
    2010 Bourbonian of the Year

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  6. #6
    Taster
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    Quote Originally Posted by barturtle
    Interesting that I had just put up a link to this last night in another thread, so here's the link again.

    http://www.straightbourbon.com/ubbth...?t=4446&page=3
    Oh wow, thanks hadn't seen that - and didn't know it had been discussed before. Lots of info in that thread. So Scotch actually decreases proof with age? Man, I love learning something new....

    Off topic, but I take it you're a Bengals fan?

 

 

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