Improved yield RSO Wintering

Lab Rat;2745671 said:

Most people out there do the QWET or Quick Wash Ethanol method which yields about 3-4 grams of oil per ounce or around 13% to 14% extraction yield. The total cannabinoid content of an ounce is about 5-5.5 grams of oil, anything above that is just chlorophyll and plant waxes.

The "SCET" method or Slow Cold Ethanol will output maximum cannabinoid content while keeping the chlorophyll and plant waxes locked away in a frozen state. Extraction yield will be 17% to 19% while your oil should look more translucent like maple syrup.

This method improves upon the one posted by 420 Motoco on his main thread so I will not cover the entire extraction:

https://www.420magazine.com/community/threads/how-make-concentrated-cannabis-oil.217727/

I do a couple of quick blasts in a food processor, it helps break up the buds and lowers the amount of ethanol needed to cover the product.

Stick all your ethanol and product in the freezer for at least 12 hours. Once your ethanol reaches the coldest temperature your freezer can provide you are done, its not going to get colder by waiting any longer but you do want your product to freeze so 12 hours should be fine.

Mix your product with your ethanol in a jar with a lid and give it a good shake, put back in the freezer for 12 hours. After 12 hours shake again and put back in the freezer for another 12 hours, shake one last time and strain to get the big stuff out.

Strain through a coffee filter, for high amounts you want to do it through several filters at the same time to avoid warming up your ethanol. At those extremely low temperatures things will get stuck in the filter which would be liquid at room temperature. This is commonly referred to as "winterizing" or filtering while cold.

Evaporate the ethanol and decarb as per Motoco's instructions.

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