If more tannin structure and flavor is desired post-fermentation, make additions with Complex or Estate. Addition is best
before barrel aging when tannins can be incorporated into the wine and when oxidation and polymerization are slow. Refresh,Richeand Riche Extra are the best tannins to use prior to bottling (3-6 weeks) when a bit of oak influence is desired. Any of these tannins can be used throughout winemaking, depending on the desired effect. Bench trials are required to determine the best tannin for a particular wine or style.