If you’re referring to MHRB whole bark or shredded bark, a boil is necessary. If you’re using powdered bark, only warm water with a bit of vinegar is sufficient:
---- For 50g powdered bark, add about 25ml vinegar and 250ml of hot water. Stir, allow to settle. Decant liquid and reserve.
---- Repeat 3 more times.
---- Reduce reserved liquid to about 200ml.
There will be no loss of yield relative to boiling.
gibran2 is a fictional character. Any resemblance to anyone living or dead is purely coincidental.