It is used in the press-destemmer to prevent oxidative reactions of anthocyanins. Gallic and ellagic tannins consume oxygen and inhibit oxidative enzymes, laccases and polyphenol oxidases, responsible for colour degradation, especially in rot affected grapes. Procyanidin tannins support these actions and are directly involved in anthocyanin stabilisation reactions. Tanniferm Flash lets you obtain wines with higher polyphenolic content and better colour stability.