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  2. Gravity (alcoholic beverage) - Wikipedia

    en.wikipedia.org/wiki/Gravity_(alcoholic_beverage)

    Gravity, in the context of fermenting alcoholic beverages, refers to the specific gravity (abbreviated SG), or relative density compared to water, of the wort or must at various stages in the fermentation. The concept is used in the brewing and wine-making industries. Specific gravity is measured by a hydrometer, refractometer, pycnometer or ...

  3. Beer measurement - Wikipedia

    en.wikipedia.org/wiki/Beer_measurement

    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. This conversion ...

  4. Baumé scale - Wikipedia

    en.wikipedia.org/wiki/Baumé_scale

    Baumé scale. The Baumé scale is a pair of hydrometer scales developed by French pharmacist Antoine Baumé in 1768 to measure density of various liquids. The unit of the Baumé scale has been notated variously as degrees Baumé, B°, Bé° and simply Baumé (the accent is not always present). One scale measures the density of liquids heavier ...

  5. Attenuation (brewing) - Wikipedia

    en.wikipedia.org/wiki/Attenuation_(brewing)

    In brewing, attenuation refers to the conversion of sugars into alcohol and carbon dioxide by the fermentation process; the greater the attenuation, the more sugar has been converted into alcohol. 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 ...

  6. Alcohol by volume - Wikipedia

    en.wikipedia.org/wiki/Alcohol_by_volume

    Alcohol by volume (abbreviated as alc/vol or ABV) is a standard measure of the volume of alcohol contained in a given volume of an alcoholic beverage, expressed as a volume percent. [1] [2] [3] It is defined as the number of millilitres (mL) of pure ethanol present in 100 mL (3.5 imp fl oz; 3.4 US fl oz) of solution at 20 °C (68 °F).

  7. History of beer - Wikipedia

    en.wikipedia.org/wiki/History_of_beer

    A hydrometer measures beer's specific gravity. The hydrometer transformed how beer was brewed. Before its introduction beers were brewed from a single malt: brown beers from brown malt, amber beers from amber malt, pale beers from pale malt. Using the hydrometer, brewers could calculate the yield from different malts.

  8. Alcohol proof - Wikipedia

    en.wikipedia.org/wiki/Alcohol_proof

    Thus pure 100% alcohol will have 100×(7 ⁄ 4) = 175 proof, and a spirit containing 40% ABV will have 40×(7 ⁄ 4) = 70 proof. 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]

  9. Hydrometer - Wikipedia

    en.wikipedia.org/wiki/Hydrometer

    The depth is read off the scale A. A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity . A hydrometer usually consists of a sealed hollow glass tube with a wider bottom ...

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