Tannin can be obtained from the skins and seeds of the grapes used to make wine, or it can be produced during the aging process of the wine in wood. The amount of tannin that is naturally present in play tic tac toe a particular grape variety will change from one vintage to the next and will be one of the factors that goes into determining the character of the wine. Take, for example, the Cabernet, which has exceptionally high levels in comparison to other wines.
