Master cultivator, Jorge Cervantes, unlocks the mysteries of CO2 kief separation.
The primary goal of any extraction method is to separate the cannabinoid-rich resin of the cannabis plant from the inert plant matter. In this extraction process, dry CO2 literally freezes the resin glands on the plant, making them easy to shake loose from foliage. These frozen glands fall through a 120- to 220-micron mesh sieve and are collected in a container below.
Done properly, CO2 extraction is exceptionally efficient, and the most common method of small-scale CO2 extraction is dry-ice separation.