Grape tannins in the context of "Ripe grapes"

Grenache (/ɡrəˈnæʃ/, pronounced [ɡʁənaʃ] ) or Garnacha (pronounced [ɡaɾˈnatʃa]) is one of the most widely planted red wine grape varieties in the world. It ripens late, so it needs hot, dry conditions such as those found in Spain, where the grape is believed to have originated. It is also grown in the Italian island of Sardinia, the south of France, Australia, and California's Monterey AVA, Paso Robles, Santa Barbara County and San Joaquin Valley.

It is generally spicy, berry-flavored and soft on the palate and produces wine with a relatively high alcohol content, but it needs careful control of yields for best results. Characteristic flavor profiles on Grenache include red fruit flavors (raspberry and strawberry) with a subtle, white pepper spice note. Grenache wines are highly prone to oxidation, with even young examples having the potential to show browning (or "bricking") coloration that can be noticed around the rim when evaluating the wine at an angle in the glass. As Grenache ages the wines tend to take on more leather and tar flavors. Wines made from Grenache tend to lack acid, tannin and color, and it is often blended with other varieties such as Syrah, Carignan, Tempranillo, and Cinsaut.

Maceration is the winemaking process where the phenolic materials of the grape—tannins, coloring agents (anthocyanins) and flavor compounds—are leached from the grape skins, seeds and stems into the must. To macerate is to soften by soaking, and maceration is the process by which the red wine receives its red color, since raw grape juice (with the exceptions of teinturiers) is clear-grayish in color. In the production of white wines, maceration is either avoided or allowed only in very limited manner in the form of a short amount of skin contact with the juice prior to pressing. This is more common in the production of varietals with less natural flavor and body structure like Sauvignon blanc and Sémillon. For Rosé, red wine grapes are allowed some maceration between the skins and must, but not to the extent of red wine production.

While maceration is a technique usually associated with wine, it is used with other drinks, such as Lambic, piołunówka, Campari and crème de cassis, and also used to steep unflavored spirit with herbs for making herb-based alcohol like absinthe.