Distillation Glossary
Jimmy | March 18, 2008Here is a glossary of terms relating to fermentation, distillation and associated subjects. I will keep adding terms as often as I can to keep it up to date.
A.B.V. - Alcohol By Volume, a measure of the quantity of alcohol in a given volume of liquid. This is different to the proof of a spirit, which is calculated as double the A.B.V. amount.
Beer - A general term given to fermented malt beverages, also another term for some types of wash.
Denaturing - The process of adding a substance to ethyl alcohol to make it unfit for human consumption. This allows retailers to sell the product without incurring the usual taxes, and is extremely difficult to reverse without a lot of expensive equipment - your home still is no good here!
Distillate - That portion of a liquid which is removed as a vapour and condensed during a distillation process.
Distillation - The process of separating the components of a mixture by differences in boiling point.
Ethanol - The alcohol product of fermentation that is used in alcohol beverages and for industrial purposes, i.e. the ‘good’ alcohol for our purposes!
Fermentation - The process by which yeast turns sugars into alcohol and carbon dioxide.
Heads - The initial run of distillate at the start of the distillation process.
Mash - A mixture consisting of crushed grains and water that can be fermented to produce alcohol.
Proof - Measure of alcohol strength, used in the U.S.A. - proof is twice the A.B.V. so 50% ABV is 100% proof.
Rectification - Re-distillation of a previously distilled liquid, so technically when you double or triple distill you are actually rectifying.
Still - A device used for distillation, often of alcohol.
Tails - The last parts collected during a distillation, generally weaker and containing undesirable congeners and fusel oils.
Wash - The liquid produced by fermentation, which can then be distilled.
