[quote:30e5dd2365="zero"]Nobody will argue with the law "the less solvent the better".     But the missing equation here is... what was the volume of basified solution that was extracted from and what was the volume of the solvent that was being freeze precipitated?    Say for example you have 600ml of basified solution and you do 3 solvent pulls of about 40ml each leaving you with 120ml of solvent to freeze precipitate. At this volume, evapping down wont affect your yield very much, you can safely freeze preipitate without losing yield. Many people overdo the solvent in which case evapping is a good idea to maximize yield.     I have years of extensive experience with this as well, so I will ONLY speak from experience.     There are missing details in this debate so it may be futile, but I was only saying that from the looks of the pics, going through that isnt the route Id have taken. Personally, if anything, I would have left the solvent in the mason jar to SLOW evap at room temp, facilitating better crystal growth and then re-freezing at about 10-20% of the original volume.... rather than transferring solvent, evapping, heating, transferring again, then freezing. Thats all.     We've all got our methods that we find best though right?[/quote:30e5dd2365]    alright, so if I put the solvent out to evap, then put it in the freezer, I'll get what I want?    Other info:  454g Bark into 2L water with approx 500g lye.  first pull was 450ml naptha