// Definition
A technique where reducing atmospheric pressure lowers the boiling point of water and other solvents, allowing extraction and purging at much lower temperatures. Under vacuum, water can boil and freeze within seconds of each other, enabling gentler processing of heat-sensitive terpenes and cannabinoids.
// From the Episode
Matt the Great Gardener shares a video in Ep 030's chat showing water boiling under vacuum to illustrate how changing pressure can achieve extraction at lower temperatures. This connects to the broader rosin and terpene extraction discussion about minimizing thermal degradation. The concept is presented as a potential breakthrough for preserving volatile terpenes during processing.