What causes Whisky to lose its brightness?

If the whisky is reduced to a low temperature or stored in very cold conditions it may become cloudy. but this cloudiness will disappear when the whisky is brought back to a normal temperature. It has been found that when whisky is actually chilled to temperatures below freezing-point the cloud formed becomes a deposit and if this is filtered off. the whisky will then retain its brightness under all conditions of temperature. Unfortunately. the removal of the deposit produced by very low temperatures also entails the removal of some of the flavour.

© SWA 1995