Angel’s Share Effect

How does the angel’s share affect my whiskey? A lot of different things affect the flavors in whiskey, not least of which is the addition of water or loss of ethanol from the barrel. The “angel’s share” is the loss of alcohol from evaporation during the aging process. Depending on where and how a whiskey is aged will determine how much is lost. (or how much water is gained) Barrels “breathe”. They are watertight, but molecules of water and ethanol will move in and out. If the microclimate within the barrel changes due to external temperature or humidity changes, the pressure within the barrel will change as well. Anyone who owns a glass barometer knows that pressure affects liquids. The change in the microclimate pushes water and alcohol into or out of the wood....