Interesting, but a couple comments:
- The pore size of a coffee filter is about 20 microns. That will catch larger particles, but smaller micelles in the emulsion will pass through. For example in milk, which is an emulsion, particle sizes are about 0.25-10 microns.
https://www.azom.com/article.aspx?ArticleID=13760
I assume the average particle size is larger in kava--evidenced by their tendency to sink to the bottom, vs. millk which is a more stable suspension--so am not sure what percent would be lost.
- In any method where the water is filtered off or poured off, rather than evaporated, most of the water soluble chemicals, such as glutathione (which might be good for you to drink), will be lost.