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I'll extend the soak time for each additional load of fresh material and give all of the spent product a final rinse with fresh solvent and run it through a screw press one more time. I'll do some testing with running it through the press without a fresh solvent rinse as well as the press gets...

What temp are you purging and drying at? I purge at 95F and dry at 85F for 4 hours then at 65F until it shatters. One thing I found with my oven was the shelves were warmer than the ambient temp so I put a silicone tray under my oil and the colors started looking a bit nicer.

I'd like to know how minimize the amount of solvent used in soaks. I know that ethanol and iso can mix with the oils almost infinitely.. but at what point does the solvent lose its efficiency and draining it and adding it to fresh material become counterproductive? The solvent would be used to...