Plaster: nm According to the ancient techniques of the Romans and according to the Roman agronomist Columelle (Book XII, 50 years after JC), plaster (gypsum, the mineral composing plaster, is a calcium sulphate) was one of the three essential elements that went into the vinification of wine with fenugreek* and seawater. Its role was to increase the acidity of the wine, to brighten its color and its clarity with, on the other hand, some secondary risks like acting on the nerves, causing pain...
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