In swim's extraction he will start tomorrow, he will be using 200g of mhrb, so each pull will be with 175-200ml naphtha. Swim is wondering if he should evaporate some of the naphtha first before attempting to freeze-precipitate, or if he should just put all 200ml in a collection jar and throw it in the freezer.

Andro

IMO that is a little too much Nap.
I would go for 80ml per pull on that amount of bark...will saturate well.
If you want to try more..then yes...evap 50% with a fan blowing over it in a roasting dish...more surface area will evap quicker.
But that will just waste Nap.

Agree with cyb.

But yeah I usually try to evap to around 100ml or less