南宁市江南区法院:How to make wine

这是讲红葡萄酒酿造.其它酒酿造可点下面网址.不知道这些资料的MP3.

Winemaking is an art that is influenced by science more and more each year. Happy barefoot grape stompers have given way to machines crafted to gently extract the juices without destroying the skins. Fermentation is carefully controlled. And yet, with all of the science, it still comes down to a flavor mix to please the winemaker's palate.
1.Preparation
The first step in making a red wine is to have the grapes perfectly ready to be picked. They need to be picked not only at the proper time in their life cycle, but also at the right time of day to ensure the acids and sugars are all at the right balance for the wine. The grapes are picked carefully, to prevent bruising, and often first put into a cleaner that removes spiders and leaves (and, one winemaker told us, occasionally mice!).

Next, the grapes are put into a machine which gently squeezes the juice out. Depending on the type of wine, the stems could be left in (for a more tannic flavor) or removed. This mix of wine is called must and is put into a fermentation vat. For red wines, the skins are left with the grapes during fermentation to impart the red color and tannic flavor.

Fermentation
The must is held in a stainless steel vat for crisper reds, or in oak barrels for more mellow reds. In whichever container, the sugars inside the grapes are turned into alcohol by yeasts. Some wineries use only the naturally occuring yeasts that are found with the grapes. Others have cultured yeasts that they use year after year. This fermentation process typically takes from 3-4 weeks.

The solids (skins and stems) in the mixture float to the top, where they are pushed back down into the mixture. They are removed from the mix when the liquid has gotten the right amount of flavour and color from it. Temperature is very important during this stage - it also affects flavour and color. Often cooling pipes or even garden hoses with holes in them are run around the vats, to maintain the correct temperature.

When fermentation is complete, the first run off from the vat is called the vin de goutte. Next, the mixture is pressed and the vin de presse comes out, dark and tannic. These two are mixed proportionally for flavour, and the result is put into oak barrels.

Aging
Aging can be done in barrels, or now it is even done in stainless steel vats with oak chips along their bottoms. Often, during aging, a special bacteria is added which allows malolactic fermentation to occur.

This additional fermentation, often noted with a "ML" on the barrel being used, converts the malic (sharp) acid into a lactic (mild) acid. Barrel aging in general allows the wine to absorb some of the flavours of the barrel, giving it an oaky and smooth taste.

The wine is stored for anywhere from 9 months to 2 1/2 years to give it the correct amount of flavor. It is then put into bottles, and these bottles are aged even further, both by the winery and also by the consumer, to bring the wine to the perfect point for consumption.

http://www.wineintro.com/making/