Traditional Processes
Traditional balsamic vinegar is produced from the juice of just-harvested white grapes (typically, Trebbiano grapes) boiled down to approximately 30% of the original volume to create a concentrate or must, which is then fermented with a slow aging process which concentrates the flavours. The flavour intensifies over the years, with the vinegar being stored in wooden casks, becoming sweet, viscous and very concentrated. During this period, a portion evaporates: it is said that this is the "angels' share," a term also used in the production of scotch whisky, wine, and other alcoholic beverages.
None of the product may be withdrawn until the end of the minimum aging period of 12 years. At the end of the aging period (12, 18, or 25 years) a small portion is drawn from the smallest cask and each cask is then topped up with the contents of the preceding (next larger) cask. Freshly reduced cooked must is added to the largest cask and in every subsequent year the drawing and topping up process is repeated. This process where the product is distributed from the oldest cask and then refilled from the next oldest vintage cask is called solera or in perpetuum.
Consortium-sealed Tradizionale balsamic vinegar 100 ml bottles can cost between US$150 and $400 each.
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