If we don't do anti-oxidation and malolactic fermentation, and don't filter the skin residue, it is possible that the wine will be sour and the nutrients will still be there, but the taste will be relatively different from that of the newly brewed wine.

If you can drink, filter the residue and let it stand for clarification, and remove the residue at the bottom.

Rinse the ripe red grapes with clear water to remove stalks, green grains, moldy grains and broken grains. , and put it into a sterilized and air-dried container (it is best not to use copper, iron or aluminum plastic containers for glass barrels or porcelain jars), and crush or mash it by hand. However, before operation, hands, sticks, containers, etc. It must be washed once with potassium permanganate, then with clear water, and then operated to prevent contamination by miscellaneous bacteria.