Homemade wine: stems, green grains, moldy grains, broken grains, etc. of ripe red grapes washed with clear water. Take it out, put it in a sterilized and air-dried container (it is best not to use copper, iron or aluminum plastic containers for glass barrels or porcelain cans), 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. At the same time, be careful not to mash grapes with tools and containers made of metals such as iron and copper (or disinfect them in cups with clean aluminum spoons).