Wine-making process involving cold maceration step

摘要

Wine-making process includes at least one maceration step which precedes fermentation and which involves cooling the grapes such that (a) they are subjected to thermal shock to cause deep-freezing of the grape skins; and (b) their initial average temp. (Ti) is reduced to an average low temp. (Tf1) with a temp. difference ( DELTA T = (T1 - Tf1) of at least 10 (pref. 15) deg C. Also claimed is a wine-making sub-unit esp. for carrying out the above process.