if your worried you could do a few acid boils on the bark, then disgard the bark and reduce the boils to fit in a litre jar. if you don't want to do the boils then I know from experience that at least 100g of powdered bark will work fine in a 1l jar.
I think you can keep the base the same as long as when its all added the solution goes black.
INHALE, SURVIVE, ADAPT
it's all in your mind, but what's your mind???
fool of the year