Carbonation

Carbonation is gas held in a liquid. In a drink, carbon dioxide stays dissolved while pressure keeps it there; release the pressure and some of the gas leaves as bubbles. The prickly sensation is the drink changing state in your mouth, not a flavor category by itself.

Two ways to put gas in a drink #

The carbon dioxide may be a product of Fermentation that was retained, or it may be added to a finished liquid. U.S. wine standards keep those ideas separate: sparkling wine gets its effervescence only from fermentation in a closed container, tank, or bottle; carbonated wine gets its carbon dioxide from another source ¹. The distinction is about process and identity, not whether one glass has more bubbles than another.

The same standard calls wine effervescent above 0.392 gram of carbon dioxide per 100 milliliters ². That is a regulatory definition, not a home carbonation target. Vessel, closure, temperature, Residual sugar, and yeast decide whether a sealed drink holds pressure; a bottling schedule must account for all of them.

Carbonation is not foam #

Foam is gas held by a film. Carbonation is gas held in the liquid before it reaches the surface. Pouring can turn one into the other: bubbles leave solution, and proteins or other surface-active material may help a head persist. A beer’s head, a wine’s bead, and the fleeting fizz of a soda are related observations, not the same texture.

Look at the pour. A steady stream of small bubbles suggests gas leaving solution throughout the glass; a large first hiss that quickly disappears suggests a different balance of pressure, temperature, and surface. Taste the prickle separately from Acidity and sweetness. Do not call sharp acid “more carbonation,” or a thick foam “more gas” without saying what you observed.

Fermented drinks keep moving #

In a sealed drink, living yeast can continue making carbon dioxide if fermentable sugar remains. Colorado State’s kombucha guidance notes that post-bottle fermentation can raise both carbonation and alcohol ³. That is why Kombucha belongs beside Beer and Cider in the drinks map, while its mixed tea culture still needs its own page. Sparkling wine is another branch of the same gas story, with a different legal identity and cellar process.

The useful question is not “Is it fizzy?” but “Where did the gas come from, and what is still capable of producing more?” For a drink already under pressure, a gusher or a swelling package is a process and safety signal, not a style note. Follow the formula and vessel guidance appropriate to that product; do not improvise a pressure limit here.

Return to Fermentation for the microbial work, Foam for gas held by films, and Drinks for the family map.