Last year's abundant harvest provided ample opportunity to hone QWET skills. Documented the last run.
Freeze-dried flower broken up in the ESPRO coffee press.
Ready for the deep freeze: two pint thermos bottles filled with 95% EtOH; ESPRO press, Chemex coffee flask with metal coffee filter and strainer.
The first wash.
Instead of scraping, transfer reduced ethanol to a PTFE boat before final evaporation.
Lately, getting quicker purges if the concentrate hasn't quite solidified when it's transferred to vacuum.
This is the initial application of vacuum. The concentrate settles down after a few minutes.
After 24 hours and breaking vacuum a few times. Ready to fold.
Lately, setting this on a heating pad and rolling flat, like cookie dough, before returning to vacuum.
Muffining upon return to vacuum.
A few days later, the finished slab. This still expands slightly under vacuum, but there's no discernible change upon folding and returning. Expect trace solvent is trapped under purge conditions.