The Exchequer Rolls’ record crown income and expenditure and the quote records eight bolls of malt given to Friar John Cor to make aqua vitae over the previous year. The term aqua vitae is Latin for “water of life” and was the general term for distilled spirits This would be enough for 1,500 bottles, which suggests that distillation was well-established by the late 15th century.
Single grain Scotch whisky is a Scotch whisky distilled at a single distillery but, in addition to water and malted barley, may involve whole grains of other malted or unmalted cereals. “Single grain” does not mean that only a single type of grain was used to produce the whisky; rather, the adjective “single” refers only to the use of a single distillery (and making a “single grain” requires using a mixture of grains, as barley is a type of grain and some malted barley must be used in all Scotch whisky). Malt whisky is distilled as a batch process in pot stills, whereas grain whisky can be distilled continuously in Continuous Stills or Column stills.
Single malt Scotch whisky must have been distilled at a single distillery using a pot still distillation process and made from a mash of malted barley.
Blended malt Scotch whisky means a blend of two or more single malt Scotch whiskies from different distilleries.
Blended Scotch whisky means a blend of one or more single malt Scotch whiskies with one or more single grain Scotch whiskies.