Contrary to popular belief, the "vol." mark on bottles of alcohol is not an abbreviation for "volumes."
We'll tell you what this "about" actually means.
What is "ob." on alcohol bottles
The strength of an alcoholic beverage (an indicator of the proportion of anhydrous ethyl alcohol in the beverage) is usually expressed as a percentage, corresponding to the ratio of the volume of anhydrous alcohol to the volume of the beverage.
This value is often called volume fraction. The accepted designations for volume fraction are ABV (alcohol by volume), %, % vol.
Degrees are also used, for example, in France. The Soviet Union also had degrees.
Thus, "rev." is an abbreviation for the word "volume" and not for the word "revolutions."
For example, “4% vol.” on a bottle of beer means that the drink contains 4% alcohol by volume.
