Alcoholic Strength (alcoholic proof)

                                                        ALCOHOLIC STRENGTH 

Alcoholic strength is a measure of how much alcohol is contained in an alcoholic beverage.


HISTORY

Before the 17th century, Britain defined alcoholic strength in term of proof, which was defined as the most diluted spirit & it should sustain combination of gunpowder  that they used to mix equal quantity of gunpowder & the spirit, then ignite it to a flame, if the mixture failed to ignite then it was called that the alcohol was too weak, if it burnt brightly it was considered as strong & if it burnt with blue flame it was considered fit for consumption, Hence by this method under proof and over proof alcohol was determined.
EUROPEAN UNION

The European Union follows the recommendation of :

ORGANISATION INTERNATIONAL DE METROLOGY LEGALE (OIML)

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OIML  recommendation provides standard for measuring alcoholic strength by  a percentage by volume,since British system was complicated a new formula was invented  

                                                      GAY LUSSAC

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according to him a spirit of 100% proof will cointan an alcohol % of 57.1% of alcohol
There are two types of alcoholic proofs :

1  UNDER-PROOF      2  OVER-PROOF

In case of Under-proof we subtract 25 from 100  = 75 proof

In case of Over-proof we add 5 to 100 = 105 proof

CALCULATION 

ACCORDING TO GAY LUSSAC 

100 PROOF SPIRIT =57.1%

1 PROOF SPIRIT= 57.1/100

75 PROOF SPIRIT = 57.1/100 *75= 42.8 V/V

USA PROOF 

In USA the percentage is measure by Alcohol by volume (ABV)In the terms of  % . 
The code of Federal Regulations requires that the liquor label must state the percentage of alcohol by volume. Here alcoholic proof is twice the percentage of alcohol by volume. When measure at a temperature of 60' Proof 
Example : 100 proof of Whisky means 50% of  alcoholic content. 

SPIRIT- it is an alcoholic product Obtained after  distillation of fermented  mixture .


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With this we come to an end of alcoholic strength measurement, hope this helps you to know the alcoholic strength more deeply, do write to me if you are need any other assistance about alcohol.

                                                         HAPPY READING..... 


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