![]() Freeze-Drying Cannabis Flowers : How it Started These products can be stored between 6 months and 3 years in polybags and 25 years or longer in cans. Final dry: Now the product is returned to room temp (70-80☏), taking the last bit of water content out of the buds.įreeze-dried products typically contain between 1% and 4% moisture.A vacuum pump then kicks in, sucking out the water vapor. Sublimation: This part of the process turns solid ice straight to water vapor, skipping the liquid phase.The colder you can get your product, the fresher. Deep-freeze: This brings cannabis buds down to – 40☏ or below.Too much heat during this phase could damage final product quality. This slow step can take anywhere from several hours to two days. This initial drying phase removes about 95% of the water present. Rapid freezing is critical and helps eliminate the formation of large ice crystals, which deteriorate the final product quality.ĭuring the drying phase, a high vacuum reduces pressure, and heat provides energy needed for the ice to sublime. The freezing phase is the most important part of the freeze-drying process. There are three stages in the freeze drying process: freezing, sublimation drying, and desorption drying. The technical term for this process is Lyophilization. ![]() Freeze Drying Cannabis: Basic Science and Benefitsįreeze-drying occurs when the solvent (usually water) and/or suspension medium is crystallized at low temperature and removed by sublimation (the direct transition from a solid state to gaseous state without melting).
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