Whisky Knowledge

“Cask strength” whiskies are whiskies which are bottled straight from the cask at the alcohol strength at which the spirit has naturally arrived at following the maturation process with no water added to dilute the strength.

At any one time, at least 18 ½ million barrels of whisky are maturing in warehouses throughout Scotland. Approximately 2% of whisky maturing in casks evaporates each year. This evanescent gift is known as ‘The Angels’ Share’

Whisky must be matured for a minimum of three years in the UK to earn the name. Most whiskies are aged for much longer. The alcohol strength at which casks are filled after distillation to allow the maturation process to begin, can vary slightly from distillery to distillery but a typical value is an “abv” of 63.5%.

When whisky is laid down, it is colourless – the colour comes from the casks in which it matures. When the barley is malted and dried, if it is dried over peat fire, it gives the whisky a characteristic smoky flavor.

The more subtle flavours of an ex-bourbon cask can have a very favourable impact on the maturation of a scotch whisky as compared to an ex-Sherry cask which can potentially overpower the whisky flavour. Many distilleries utilise a combination of the two types.

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