Denomination (also pure variety) for a wine that has been made from 100% of a single grape variety. If other grape varieties are also involved (even if only slightly), one cannot speak of "varietal purity", although the term "varietal purity" is also used colloquially for a clearly dominant grape variety. However, the term is not regulated by wine law. Within the EU, however, there is a wine-law regulation for the naming of grape varieties on the label. If a single grape variety is indicated there, its proportion must be at least 85% (in the USA or Australia, for example, only 75%). The remaining 15% can be supplemented by other varieties but do not appear on the label.
Single-varietal wines play a traditionally important role, especially in the German-speaking countries of Germany, Austria, South Tyrol and Switzerland, as well as in the former Eastern Bloc countries. In southern countries, by contrast, mainly blends are part of the wine culture, where the origin is much more important than the grape variety. France in particular has a great tradition here, with the exceptions of the regions of Burgundy, Alsace and partly Loire (see also Romanesque wine law).
Wines made from (mainly) one grape variety are also called varietal wine, Vin de cépage (France) or Varietal Wine (USA, Australia). An artful blend of wines made from several different grape varieties is called a cuvée, whereas a wine made from several grape varieties fermented together (which are usually grown together in one vineyard) is called a mixed set.
Complete lists of the numerous vinification measures or cellar techniques, as well as the types of wine, sparkling wine and distillate regulated by wine law are included under the keyword vinification. Comprehensive information on wine law can be found under the keyword wine law.