Grape Mill

Mechanical device (also known as a crusher) for crushing grapes. In red winemaking, this is used to produce the mash for mash fermentation, which is why the process is also called mashing. In white wine making, this is done immediately before pressing. The grapes are crushed between two spiked rollers so that the juice can escape more easily during pressing. This also releases enzymes, extract and aroma substances. If possible, the seeds and (if they are still present) stems should not be damaged during this process in order to prevent the bitter tannins, which are particularly present in green stems of grapes and have an unpleasant taste if they are present in too large a quantity, from escaping. The alternative crushing process is preferably carried out after destemming, whereby the destemmer used for this is often coupled with the grape mill. See also under winemaking.

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Grape Mill

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