How is a vinaigrette made?
Vinaigrette
Different vinegars, such as raspberry, create different flavors, and lemon juice or alcohol, such as sherry, may be used instead of vinegar. Balsamic vinaigrette is made by adding a small amount of balsamic vinegar to a simple vinaigrette of olive oil and wine vinegar.
Acetic acid
Nowadays, most vinegar is made in submerged tank culture, first described in 1949 by Otto Hromatka and Heinrich Ebner. In this method, alcohol is fermented to vinegar in a continuously stirred tank, and oxygen is supplied by bubbling air through the solution. Using modern applications of this method, vinegar of 15% acetic acid can be prepared in only 24 hours in batch process, even 20% in 60-hour fed-batch process.