What is wine?
Wine has been produced for many centuries from just a couple simple ingredients: yeast and grape juice. Actually, just about any fruit juice can be used, but by far the majority of all wine is made from the juice of the grape.
Historically wine was the drink of choice because of the sometimes poor quality of the drinking water in so many regions. Today, of course, we tend to open a bottle of fine wine at times of celebration or offer it as a welcome gift as part of a wine gift basket.
How is wine made?
Since there are yeast spores in the air, wine could be made without effort simply by allowing grape juice to stay in an open container for an extended period of time. You probably wouldn’t find that so enjoyable, though.
Yeast is a living organism. In wine making, the yeast feeds off the sugars. That process is called fermentation. The action of fermentation converts the sugars in the juice into alcohol with a biproduct of carbon dioxide. In contemporary times, special types of yeast have been cultured solely for their use in wine making. The particular strain of the yeast, along with other factors, determines the flavor of the wine.
The wine is removed from the original container and placed into another container in order to mature before bottling. The yeast stays in the original container.
There are black grapes and green grapes and grapes of various gradations in between. Regardless of the color of the grape the juice is always clear, or nearly so. If the skins are left in the juice during fermentation, a red wine is the result. A white wine results when the skins are removed.
Many factors contribute to the eventual flavor of any wine. They include the strain of yeast, the type of grape, the soil conditions, the weather during the growing season, the technique and temperature during fermentation and even the nature of the oak barrels in which the wine matures.
It is because of all of these variables that a wine drinker can always notice a flavor difference from one wine to the next. This can make for an interesting hobby of never-ending discovery.
What is tannin?
Tannin is a substance in wine that causes a firm, mouth-drying feeling in your mouth. It is extracted from the skins, seeds and stems of the grapes so red wines will contain more tannin than whites. White wines will get a degree of tannin when oak barrels are used for fermentation or aging. Eat just the skins of grapes or drink strongly brewed, unsweetened tea for a good idea of what tannin feels like in your mouth.
Clearly, this has been a quick overview of wine, but hopefully it has filled some of the voids in your understanding of this historic drink.












