The production process, known in France as
mutage, is similar to that used to make
Port, and dates to the 13th century. A
neutral grape spirit is added to the must to halt
fermentation while sugar levels are still high, preserving the natural sweetness of the grape. The wines are then matured, sometimes in oak barrels, or typically outside in glass bottles (called
demijohns or
bonbonnes) for a year. While in the sealed bottles, the wine is exposed to sun, rain, temperature swings, and extreme weather; the heat allows the wine to
maderise. The wine then matures in barrels for a minimum of four years. The resulting wine bears a similarity to
tawny port but tends to be lower in alcohol (~16 percent vs. ~20 percent). While the similar
Banyuls and
Maury are typically high-quality, Rivesaltes is made in a wide variety of styles, depending on
terroir and winemaker skills and preference. Rivesaltes traditionally was made by larger professional wineries and cooperatives, while Banyuls and Maury tended to be made by amateur winemakers but in a more artisanal fashion. ==History==