Freeze precipitation is putting a reduced volume of either naptha/bestine/heptane in your freezer, where the reduced solubility of the alkaloids in the solvent causes them to precipitate into very clean crystals.
The best way to do it imo, is to combine all your np pulls, and evap it down until the solvent starts to get cloudy. Then pour it in to either a sealable dish with lots of surface area (easier to scrape, but naptha can get into your freezer if you are not careful to seal it well), or a small mason jar. Freeze it over 1-3 days and lots of alkaloids will crystallize out and on to the mason jar or glass surface if you use an evap dish. Pour off your naptha, saving for another precipitation, and be sure to catch any "floaties" that may be caught up in your solvent.
Scrape, dry, and recrystallize/wash to your liking then enjoy.
Good luck.
"let those who have talked to the elves, find each other and band together" -TMK
In a society in which nearly everybody is dominated by somebody else's mind or by a disembodied mind, it becomes increasingly difficult to learn the truth about the activities of governments and corporations, about the quality or value of products, or about the health of one's own place and economy.
In such a society, also, our private economies will depend less upon the private ownership of real, usable property, and more upon property that is institutional and abstract, beyond individual control, such as money, insurance policies, certificates of deposit, stocks, etc. And as our private economies become more abstract, the mutual, free helps and pleasures of family and community life will be supplanted by a kind of displaced citizenship and by commerce with impersonal and self-interested suppliers...
The great enemy of freedom is the alignment of political power with wealth. This alignment destroys the commonwealth - that is, the natural wealth of localities and the local economies of household, neighborhood, and community - and so destroys democracy, of which the commonwealth is the foundation and practical means.” - Wendell Berry