This is a method used to extract cannabinoids from the hemp plant. It is used due the high level of control it has over temperature and pressure. This method ensures that the oil produced is both pure and clean whilst protecting the active cannabinoids and terpenes found in the cannabis plant.
Another advantage of this method is that you can separate the constituent oils and remove anything that is not wanted in the final product. For instance, THC, so a broad-spectrum oil can be produced to guarantee that it will not have too much THC and break UK law.