wht is the difference between %v/v & proof strength in alcoholic beverages?

Answer 1

Proof = %v/v times 2

Answer 2

Proof Strength Of Alcohol

Answer 3

Percent by volume (%v/v) is simply alchohol / water ratio.
In the definition current in the United States, the proof number is twice the percentage of the alcohol content measured by volume at a temperature of 60 °F (15.5 °C). Therefore "80 proof" is 40% alcohol by volume (most of the other 60% is water).
This system dates to the 18th century, and perhaps earlier, when spirits were graded with gunpowder: A solution of water and alcohol "proved" itself when it could be poured on a pinch of gunpowder and the wet powder could still be ignited. If it didn't ignite, the solution had too much water in it and the proof was considered low or "underproof".
A "proven" solution was defined as 100 degrees proof (100°). This has since been found to occur at 57.15% ethanol. This is still used as the British definition. A simpler ratio to remember is 7:4, i.e. 70° proof is 40% alcohol by volume. Thus pure alcohol is approximately 175 degrees proof (175°).

Answer 4

Yes proof is double the percent alcohol, I heard something liek proof was used back when to prove that the alcohol was a certain strength or something, really kinda useless nowadays.

Answer 5

I have no idea what you are asking. They have to let you know, on the bottles of alcohol you purchase how much alcohol it contains.
So you can tell the strength before buying it. Look at the labels.

Answer 6

100 proof = 50% alcohol, 200 proof = 100% alcohol, etc.

Answer 7

the proof # is always 2x what the alchol volume label says
it's on old English standard of measuring potency of alcoholic beverages