A carboy, also known as a demijohn or a lady jeanne, is a rigid container with a typical capacity of . Carboys are primarily used for transporting liquids, often drinking water or chemicals. They are also used for in-home fermentation of beverages, often beer or wine.

History and etymology

The word '' carboy'' is from the

Persian Persian may refer to: * People and things from Iran, historically called ''Persia'' in the English language ** Persians, the majority ethnic group in Iran, not to be conflated with the Iranic peoples ** Persian language, an Iranian language of the ...

''qarābah'' ( قرابه), from

Middle Persian Middle Persian, also known by its endonym Pārsīk or Pārsīg ( Inscriptional Pahlavi script: , Manichaean script: , Avestan script: ) in its later form, is a Western Middle Iranian language which became the literary language of the Sasania ...

''Karāvah''.

Arabic Arabic (, , or , ) is a Central Semitic languages, Central Semitic language of the Afroasiatic languages, Afroasiatic language family spoken primarily in the Arab world. The International Organization for Standardization (ISO) assigns lang ...

also borrowed it as ''qarrāba'', meaning "big

jug A jug is a type of container commonly used to hold and serve liquids, but not normally to drink from directly. It has an opening, sometimes narrow, from which to pour or drink, and has a handle, and usually a pouring lip. Jugs throughout histor ...

". The Spanish-language term is ''garrafa''. English '' carafe'' is an etymological doublet via Italian and French. '' Demijohn'' originally referred to any glass vessel with a large body and small neck, enclosed in

wicker Wicker is a method of weaving used to make products such as furniture and baskets, as well as a descriptor to classify such products. It is the oldest furniture making method known to history, dating as far back as . Wicker was first documented ...

work. The word presumably comes from the French ''dame-jeanne'', literally "Lady Jane", as a popular appellation; this word is first attested in France in the 17th century. In

Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, a Romance ethnic group related to or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance languag ...

it is called ''damigiana'', most probably derived from French. In some Spanish-speaking countries such as Argentina, it is also referred to as ''damajuana''. An alternative etymology derives it from the name of a

town,

Damghan Damghan () is a city in the Central District (Damghan County), Central District of Damghan County, Semnan province, Semnan province, Iran, serving as capital of both the county and the district. It is east of Tehran on the high-road to Mash ...

, but there is no evidence for this.

Size

Carboys come in various volumes ranging from . The term carboy itself usually refers to a carboy, unless otherwise noted. A carboy is sometimes called a

. A carboy is usually called a demijohn (in the Philippines, ''dama juana''Ocampo, Ambeth R. (August 9, 2006) ''

Philippine Daily Inquirer The ''Philippine Daily Inquirer'' (''PDI''), or simply the ''Inquirer'', is an English-language newspaper in the Philippines. Founded in 1985, it is often regarded as the Philippines' newspaper of record. The newspaper is the most awarded broad ...

''
Tanduay
. p. 13.). In Britain, "demijohn" refers to a glass brewing vessel.

Brewing

brewing Brewing is the production of beer by steeping a starch source (commonly cereal grains, the most popular of which is barley) in water and #Fermenting, fermenting the resulting sweet liquid with Yeast#Beer, yeast. It may be done in a brewery ...

, a carboy or demijohn is a glass or plastic vessel used in fermenting beverages such as

wine Wine is an alcoholic drink made from Fermentation in winemaking, fermented fruit. Yeast in winemaking, Yeast consumes the sugar in the fruit and converts it to ethanol and carbon dioxide, releasing heat in the process. Wine is most often made f ...

mead Mead (), also called honey wine, and hydromel (particularly when low in alcohol content), is an alcoholic beverage made by fermenting honey mixed with water, and sometimes with added ingredients such as fruits, spices, grains, or hops. The alco ...

cider Cider ( ) is an alcoholic beverage made from the Fermented drink, fermented Apple juice, juice of apples. Cider is widely available in the United Kingdom (particularly in the West Country) and Ireland. The United Kingdom has the world's highest ...

perry Perry or pear cider is an alcoholic beverage made from fermented pears, traditionally in England (particularly Gloucestershire, Herefordshire, and Worcestershire), parts of South Wales, France (especially Normandy and Anjou), Canada, Austral ...

, and

beer Beer is an alcoholic beverage produced by the brewing and fermentation of starches from cereal grain—most commonly malted barley, although wheat, maize (corn), rice, and oats are also used. The grain is mashed to convert starch in the ...

. Usually it is fitted with a

rubber Rubber, also called India rubber, latex, Amazonian rubber, ''caucho'', or ''caoutchouc'', as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds. Types of polyisoprene ...

stopper and a fermentation lock to prevent

bacteria Bacteria (; : bacterium) are ubiquitous, mostly free-living organisms often consisting of one Cell (biology), biological cell. They constitute a large domain (biology), domain of Prokaryote, prokaryotic microorganisms. Typically a few micr ...

and

oxygen Oxygen is a chemical element; it has chemical symbol, symbol O and atomic number 8. It is a member of the chalcogen group (periodic table), group in the periodic table, a highly reactivity (chemistry), reactive nonmetal (chemistry), non ...

from entering during the fermentation process. During the

homebrewing Homebrewing is the brewing of beer or other alcoholic beverages on a small scale for personal, non-commercial purposes. Supplies, such as kits and fermentation tanks, can be purchased locally at specialty stores or online. Beer was brewed dom ...

process, a primary carboy is used for fermentation. Once primary fermentation is complete, the beer is either transferred to a secondary carboy for conditioning or it can be transferred directly to bottles for conditioning. (This process of transferring is usually called

racking Racking, often referred to as Soutirage or Soutirage traditionnel (meaning racking in French), also filtering or fining, is the process of moving wine or beer from one container to another using gravity rather than a pump, which can be disrupti ...

Laboratory

In modern laboratories, carboys are usually made of plastic, though traditionally were (and still are in many university settings) made of ferric glass or other shatter-resistant glasses immune to acid corrosion or

halide In chemistry, a halide (rarely halogenide) is a binary chemical compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative (or more electropositive) than the halogen, to make a fl ...

staining common in older plastic formulations. They are used for storing large quantities of liquids, such as

solvent A solvent (from the Latin language, Latin ''wikt:solvo#Latin, solvō'', "loosen, untie, solve") is a substance that dissolves a solute, resulting in a Solution (chemistry), solution. A solvent is usually a liquid but can also be a solid, a gas ...

s or deionised water. In these applications, a tap may be included for dispensing. Carboys are also used to collect and store waste solvents. Collecting waste solvents in plastic carboys is preferable to reusing glass Winchesters due to the lesser chance of breakage if a solution is placed in an incorrectly labeled carboy.

Polypropylene Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer Propene, propylene. Polypropylene belongs to the group of polyolefin ...

carboys are also commonly used in laboratories to transfer purified water. They are typically filled at the top and have a spigot at the bottom for dispensing.

References

External links