Quote:
Originally Posted by RoastedOak
I guess what I don't really "get" is why the bentonite is being added at the beginning? What purpose does adding a clearing agent serve the wine at that stage?
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Bentonite is a negatively charged substance and when hydrated and added to wine, it will attract the positively charged particulate in the wine. As bentonite hydrates and swells, it becomes like a sponge which accounts for it's very large surface area. When it is mixed thoroughly into the wine and is dispersed throughout, the positively charged matter in the wine attaches to the bentonite. The weight of the molecules then cause the matter to drop to the bottom of the container.
There are two different schools of thought on when to add bentonite. One school says to add it to the must before you add yeast. The other suggests that bentonite should be added after fermentation has been completed. There is no right or wrong answer, and with your own experimentation, you may end up with your own preference. Regardless of when you add it, the actions of bentonite are the same. However, some believe that there is an additional benefit when adding to the must before fermentation begins.