The amount of lye is dependent on the volume of your liquid, NOT the amount of plant material used. For 500ml anything between 4-20g lye would work, with 20g being preferable (i.e. more foolproof)
The amount of naphtha is irrelevant to the plant material but usually 1/10th of the aqueous volume is recommended. Smaller pull volumes will require more pulls, but large pulls will make freeze precipitation inefficient/impossible.
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