Single malt whisky (and sometimes a third) time. The final spirit, called "new make spirit", generally has an alcohol content of 60 to 70%. Most new-make malt whisky is diluted to about 62.5% a.b.v. before it is placed in casks to mature. The "new-make spirit", or unaged whisky, is then placed in oak casks to mature. By law, all Scotch whisky must be aged for a minimum of three years in oak casks, though many single malts are matured for much longer. The whisky continues to develop and change as it spends time in the wood, and maturation periods of twenty years or
Barbera d'Asti has been possible to produce "Barbera d'Asti Superiore", for which the wine must have an alcoholic strength of at least 12.5% by volume, and be aged for at least 14 months, 6 months of which stored in oak or chestnut barrels. Many "superiore" producers refine it in small oak barriques to obtain a rounder taste. The "superiore" has the following sub-zones indicated on the label: "Nizza", "Tinella", or "Colli Astiani" ("Asti"). The "superiore" wine has a strong additional aging potential; it can often be aged from ten to twenty years. The Nizza DOCG was added to Asti's Barbera portfolio in