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3rd/4th Sem F & B Operations Notes

Scales for Measuring Alcohol Strength

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Last updated: 10 July 2023

Scales for Measuring Alcohol Strength

There are three scales of measuring proof namely:

  • Gay Lussac or GL system: In this system, the proof is equal to the percentage of alcohol in the spirit. So if Vodka has 43% alcohol it is 43⁰ proof GL.
  • British or Canadian Proof: Bartholomew Sykes devised a hydrometer which calculated that 57.1⁰ % of alcohol is equivalent to 100⁰ % BP. So 100% of alcohol is equal to 175 ⁰ BP.
  • American or US Proof: In this system, 50% alcohol is equal to 100⁰ US proof. Therefore 100 % alcohol is equal to 200⁰ US.

          Therefore we can say that :   100⁰ GL = 175⁰ BP = 200⁰ US

 

Organization International Metrologique Legale (OIML)

 

It is now mandatory for all manufacturers to indicate in % the amount of alcohol on the bottle. OIML is the same as GL, which is the most logical of the systems.

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Syllabus BHM202 (T)

01 Alcoholic Beverage

  1. Introduction and definition
  2. Production of Alcohol
    1. Fermentation process
    2. Distillation process
  3. Classification with examples

02 Dispense Bar

  1. Introduction and definition
  2. Bar layout – physical layout of bar
  3. Bar stock – alcohol & non-alcoholic beverages
  4. Bar equipment

03 Wines

  1. Definition & History
  2. Classification with examples
    1. Table/Still/Natural
    2. Sparkling
    3. Fortified
    4. Aromatized
  3. Production of each classification
  4. Old World wines (Principal wine regions, wine laws, grape varieties, production and brand names)
    1. France
    2. Germany
    3. Italy
    4. Spain
    5. Portugal
  5. New World Wines (Principal wine regions, wine laws, grape varieties, production and brand names)
    1. USA
    2. Australia
    3. India
    4. Chile
    5. South Africa
    6. Algeria
    7. New Zealand
  6. Food & Wine Harmony
  7. Storage of wines
  8. Wine terminology (English & French)

04 Beer

  1. Introduction & Definition
  2. Types of Beer
  3. Production of Beer
  4. Storage

05 Spirits

  1. Introduction & Definition
  2. Production of Spirit
    1. Pot-still method
    2. Patent still method
  3. Production of
    1. Whisky
    2. Rum
    3. Gin
    4. Brandy
    5. Vodka
    6. Tequilla
  4. Different Proof Spirit
    1. American Proof
    2. British Proof (Sikes scale)
    3. Gay Lussac (OIML Scale)

06 Aperitifs

  1. Introduction and Definition
  2. Types of Aperitifs
  3. Vermouth (Definition, Types & Brand names)
  4. Bitters (Definition, Types & Brand names)

07 Liqueurs

  1. Definition & History
  2. Production of Liqueurs
  3. Broad Categories of Liqueurs (Herb, Citrus, Fruit/Egg, Bean & Kernel)
  4. Popular Liqueurs (Name, colour, predominant flavour & country of origin)