Can’t argue with that
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Positive pressure provided by diaphragm vacuum pump.
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And you can always push into a vessel that’s also in a freezer so that you can review your outcome and know if you removed a sufficient amount of fats and waxes.
You can also always take your result and then put that result on dry ice and check for any residual fats and waxes and come up with your own conclusions, as to if it’s sufficiently filtered enough to your liking.