Screw press; I’ve seen a company in Canada use an enormous screw to press the buds. The plant is soaked in Coconut Oil and is popped in the top of a vast funnel and drop through to a big screw.
The big screw turns and presses the buds so tightly, Hemp oil comes out the other side. It resembles the consistency of runny honey only with more of a green tinge.
The end product is a beautiful golden-green juice, the full plant with the CBD’s, flavonoids and the Terpenes.
In a lab: imagine something like your hand press coffee machine at home, a cafetiere. The hemp buds are dropped into the pressure machine, and an Advanced Liquid Co2 is added (super critical C02).
Then pressure is applied from the top of the device, plunged, pushing Co2 liquid through the buds.
The liquid breaks down the buds and pressure drives through green goodness, collecting at the bottom in a bottle.
Some processes include a further step with Ethanol, Ethanol is added to the bottle, shaken not stirred and the green gloop becomes a liquid, this is to enable precise extraction and separation.
The terpenes are separated from the mixture at this stage.
Terpenes are separated as they would not survive the clean-up process that’s about to happen.
The remaining liquid is frozen to further separate elements.
Each plant variety produces different levels of CBD, CBG, Terpenes, flavonoids and lipids (fatty acids).
All separated, it’s now cleaned, and any impurities removed. The next step is a further distillation clean to ensure all ethanol is removed, ensuring purity. At the end of the process, the Terpenes are added back to the oil in their batches.