Stefan Stangaciu PhD, Apitherapist, teach us how to do it in 1998.
You can use ethyl alcohol solution of propolis to human health. 200 g of
propolis and an alcohol pint.
After filtration you put filtered solids into a one gallon water for at
least three month to an year. This water solution you can spayed over
frames.
Alcohol solution you can concentrate it for human health at 40ºC helping
with a fan.
fernando
Cba, Arg.
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