Answer By The Original Resinator team:
With respect to hemp and CBD extractions, subcritical Co2 has lower solvency power and thus tends to pull mostly lighter extractions and leaves behind the majority of undesired plant material. Subcritical Co2 is also relatively cold and therefore very effective in extracting temperature-sensitive volatile oils and terpenes. Subcritical Co2 is ideal for extracting and preserving light resin glands and oils from the plant material. Subcritical (low temp, low pressure) Co2 extractions take more time and produce much smaller yields than supercritical, but they retain the essential oils, terpenes, and other sensitive chemicals within the plant.