It is the degree of alcohol, alcohol is forty degrees

1. The degree of alcohol in the United States is expressed by alcohol purity. One degree of purity is equivalent to 0.5 alcohol content. The degree of alcohol is standard wine. The standard alcohol content was invented by the famous French chemist Gay-Lussac. It refers to the number of milliliters of pure alcohol contained in every 100 ml of wine when the temperature of the wine is 20°C. It is also called the Gay-Lussac alcohol content. Usually Expressed as a percentage or with the abbreviation GL.

2. The British alcohol content is a method of calculating the alcohol content created by Clark, an Englishman in the 18th century. The American alcohol content is expressed in terms of alcohol purity. One degree of alcohol purity is equivalent to 0.5. The alcohol content of the three types of alcohol is converted into standard alcohol content × 1.75 = British alcohol content. Standard alcohol content × 2 = US alcohol content. British alcohol content × 8/7 = US alcohol content.

3. There are two ways to express the alcohol content on the label. The European percentage method is expressed in percentage or degree in Europe and other countries. For example, whiskey is generally 40Vol or 43Vol, brandy is 40Vol, and wine is 12~ 12.5Vol, the American proof method in the United States and Canada is expressed by proof. The value of proof is equal to twice the percentage, such as 80proof=40.