Red wine is made by fermenting the juice of dark-skinned grapes. Red wine differs from white wine in its base material and production process. Red wine is made with dark-skinned rather than light-skinned grapes. During red wine production, the winemaker allows pressed grape juice, called must, to macerate and ferment with the dark grape skins, which adds colour, flavour and tannin to the wine.

 There are hundreds of varieties of red wine grapes with the main varieties including Cabernet Sauvignon, Cabernet Franc, Gamay, Grenache, Merlot, Mataro, Nebbiolo, Pinot Noir, Sangiovese, Shiraz/Syrah & Zinfandel.