I always assumed if you used the same feints over and over, eventually there will be a build up of forshots (methanol) that could eventually reach a dangerous level.
However this is not the case, both the most and least volatile components stabilise once the point equilibrium is reached (after 5-6 spirit runs)
The most volatile evaporate and the least volatile eventually remain in the backwash and are wash out with the backset.
Also interesting that they allude to the fact the the spirit still head and condenser are not cleaned between spirit runs, they rely on the high alcohol content of the foreshore to clean out the oils in the condenser at the beginning of the next spirit run.Statistics: Posted by Anavrin — Sun Nov 20, 2016 11:31 am
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