When we pop the cork of a sparkling wine at a party a flurry of bubbles are released. We love sipping those bubbles, but how do they get in the bottle? There are several ways that it can happen.
Sparkling wine is bubbly because carbon dioxide gas, a byproduct of fermentation, is trapped within the wine. During fermentation yeast feeds on the grape juice’s natural sugars and produces heat, alcohol, and carbon dioxide. During the initial fermentation, this gas is released into the air. When wine is allowed (or encouraged!) to undergo a second fermentation within the bottle the carbon dioxide gas is trapped inside in the form of bubbles.
The following methods are a few different ways to produce bubbles in a bottle of wine. There is a lot more information behind each of these techniques, but this is a good start to get the general idea. We’ll start with the oldest method and move forward through time and technological advances. (more…)