WHAT CAUSES WHISKY TO SOMETIMES 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 (chill-filtration as it is known), the whisky will then retain its brightness under all conditions of temperature.
