What Does Proof Mean When It Comes To Alcohol? - Chowhound
Source: Chowhound
Lucentius/Getty Images The practice of proofing alcohol dates back to centuries-old British tax laws when spirits with higher alcohol content would be taxed at higher rates. In order to prove the tax rate, the British government used the gunpowder testing method for liquor. After saturating a little gunpowder in the spirit, officials would try to set it on fire. If it caught flame, then it was "proof" that the…
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