Or if they are melty, it might be a sign that the wine is mature.
Tannins come from grape skins, seeds and stalk, and can tell you a lot. Certain grapes like Nebbiolo from Northern Italy has very strong tannins, in contrast Gamay from Beaujolais has light. Or if they are melty, it might be a sign that the wine is mature. Astringent tannins are usually a sign of underripe grapes or careless handling in the winery. Tannins also come from oak barrels and tend to be smoother