How do we get tannins in our wine?
We see the presence of tannins much more dominant in red wines than in white, due to several different factors. First being that the skins, seeds, and stems are usually what give wines their tannins. In red wines these tannins appear because of the process in which after a wine is pressed, the juice may sit in contact with the skins, seeds, and stems for some time extracting the tannin from them. It can also be picked up from contact with wood of the barrels used during the aging process which is more typical of red wines.