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The original gravity is the specific gravity measured before fermentation. From it the analyst can compute the original extract which is the mass (grams) of sugar in 100 grams (3.5 oz) of wort (°P) by use of the Plato scale. The symbol will denote OE in the formulas which follow.
A rough conversion between specific gravity, SG, and either degrees Brix, Plato or Balling can be made by dividing the thousandths of SG above 1 (which is often referred to as gravity points) by 4. So a specific gravity of 1.048 has 48 gravity points, and 48 divided by 4 would be approximately 12 degrees Plato, Balling or Brix.
Specific gravity is the density of a liquid relative to that of water, i.e., if the density of the liquid is 1.05 times that of water, it has a specific gravity of 1.05. In UK brewing usage, it is customary to regard the reference value for water to be 1000, so the specific gravity of the same example beer would be quoted as 1050.
A more attenuated beer is drier and more alcoholic than a less attenuated beer made from the same wort. Attenuation can be quantified by comparing the specific gravity — the density of a solution, relative to pure water — of the extract before and after fermentation, quantities termed the original and final gravities.
A hydrometer measures beer's specific gravity (from History of beer) Image 47 A 16th-century brewery (from Brewing ) Image 48 A growler of beer from Flounder Brewing , a nanobrewery in New Jersey , US (from Craft beer )
Overall U.S. sales volumes of beer dropped roughly 1.4% in 2013, but investors remain intrigued because buried deep within that number is a rapidly growing 3 Charts Every Beer Investor Needs to ...
The proof system in the United States was established around 1848 and was based on percent alcohol rather than specific gravity. Fifty percent alcohol by volume was defined as 100 proof. [ 4 ] Note that this is different from 50% volume fraction (expressed as a percentage); the latter does not take into account change in volume on mixing ...
A beer bottle that is half the capacity of a 750 mL champagne/wine bottle. Reused champagne punts were used in the 19th century to ship lager beer to Australia, establishing it as the beer "quart". When metrication was introduced in the 1970s, the Reputed Pint (13 1 ⁄ 3 imp oz [379 mL]) was replaced with the 375 mL stubbie. Schooner (UK) 378. ...