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What is the best low temperature for winterization?

edited October 2017 in Equipment Vote Up0Vote Down

Our freezer's working temperature is between -18 -22C. We keep the solution crude oil plus Ethanol for 48 hours before first filtration.
I read that some folks are using deep freezing -42C or even -84C . Are they trying to shorten the time or will the lower temperature make a better final product?


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