How is the alcoholic strength of Scotch Whisky measured?

In common with other EC countries, on 1st January, 1980 Britain adopted the system of measurement recommended by the International Organisation of Legal Metrology, a body with most major nations among its members. The OIML system measures alcoholic strength as a percentage of alcohol by volume at a temperature of 20°C. It replaced the Sikes system of measuring the proof strength of spirits, which had been used in Britain for over 160 years .

© SWA 1995