Sorry EW...this is not correct.Earthwalker said:If you use 50g bark use 50ml naphtha if you use 100g bark use 100ml naphtha
You use 40-50ml of solvent for each pull regardless of the quantity of bark or water.
Think about it...if a Re-x, using 30ml of hot solvent, can hold 1g of spice...then each pull can 'potentially' hold 1g (or more) of product.
Effectively you are trying to drag out 1g at a time (although this never happens)
Using any more solvent than this is a waste and will dilute too much, making precip more unlikely.
Combining pulls and air evap to saturate, is a good idea.
All used solvent can and should be Re-used.