Removing Impurities in Alcohol
Would you explain that?
Droopy wrote:
> no
>
> that foam you see is just air getting whipped into the liquid.
> Distillers call that the bead and you can estimate the percentage
> alcohol of the spirit by the size of the bead.
>
> You cannot purify a spirit in that way.
>
>
> John Public wrote:
>> I use rum/vodka to fortify wine and make liqueurs, and I noticed
>> something strange when I shook a bottle of plain white rum. (The same
>> thing happened with vodka.) When I shook the bottle, the liquid's
>> appearance changed in three quick stages:
>>
>> - cloudy all over (first 1-2 seconds)
>> - started to clear, but a thin layer (< oz.) of white foamy/starchy
>> substance surfaced (3-7 seconds)
>> - everything cleared back to normal (8-10 seconds)
>>
>> I'm aware that cheap alcohol is usually not filtered as much as
>> top-shelf brands, so I'm suspecting the shaking caused a temporary
>> "centrifugal effect" that, for a short time, surfaced many of the
>> impurities. If I poured out the little oz. or so of the foamy liquid,
>> would the remaining liquor be cleaner?
>
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