What does the darker the bottom of the wine bottle represent?

It can be found that there is a groove at the bottom of the red wine bottle, and the depth of the groove is different, while other fruit wines have a flat bottom, so what does the deeper the bottom of the red wine bottle mean? There is a saying that the deeper the dent, the better the quality of the red wine, but there is no basis for it. At first, the dent was to precipitate impurities, so the deeper the dent, the more impurities the more durable it is, and it is also conducive to transportation and pouring. Wine, display, etc.
The scientific name of the groove at the bottom of the wine bottle is ” (xuan) bottom”, which was originally used to precipitate impurities in wine. As a fermented wine, wine was only simply filtered during early brewing, so there will be a lot of impurities at the bottom of the bottle after bottling. In order to prevent impurities from pouring out when pouring wine, a groove is designed to allow the sediment to settle in the groove. It is not easy to be poured, thus enhancing the taste.
But you will find that there are not only grooves on the bottom of the red wine bottle, but also different depths of the grooves for different red wines. At first, the longer the wine is aged, the more impurities it has, so deeper grooves are needed, so some people think, The deeper the groove, the higher the quality of the wine, but it can only prove that there are more impurities.
In addition, the winery has no strict regulations on the depth of the groove at the bottom of the bottle. That is to say, the depth of the groove depends entirely on the winery’s judgment on the wine. However, it was later discovered that the grooves at the bottom not only have the advantage of precipitating impurities, but are also more useful than flat bottoms in terms of aging, transportation, and pouring wine.
Wines with traditional craftsmanship need to be rolled regularly. Usually, a roller is inserted in the groove, 2-3 times a day, each time rolling at 20-30 degrees, so that the wine can be fermented more thoroughly and evenly, so the concave bottom of the bottle The groove depth is also designed according to the shape and usage habits of the roller