clock author BAS Research

Cannabis oil is often viewed as the most versatile cannabis plant byproduct. It represents much of what the cannabis culture is today. But have you ever wondered how is it’s possible to get such a clear,pure oil from this plant?


At BAS Research we use two very common methods to refine oil that has been extracted from the cannabis plant: Winterization and Distillation. These methods create oil of superior quality, allowing BAS to produce the purest oil for our consumers.

The visual differences between the distillate and winterized cannabis oil.
(Distillate to the left: With a more clear and bright oil color / Winterized to the right: With a translucent amber color)

It’s important to note that extraction and refinement are two different processes and they are done in very different ways. The refinement process is done after an initial extraction procedure using Supercritical CO2.


The Winterization method involves putting the raw cannabis extract through an alcohol wash that filters some of the undesirable materials The raw extract is immersed in the alcohol, where it is then frozen, hence its name. This process separates the cannabinoids from other compounds like terpenes and wastes such as waxes, lipids, and plant chlorophyll. This process creates a superior oil, reaching the rate of up to 65% potency.


The Distillation method occurs through a process called “short path distillation”, which separates and refines valuable molecules, as well as  contaminants, resulting in a clean and practically transparent concentrate. In comparison with other refinement means, the distillate is in a level above because it obtains a pure oil of very high potency. Here at BAS, we produce CBD and THC distillates with 75-85% potency, in addition to the ultra-premium THC distillate oils that can reach up to 90% potency.

You may be wondering why the distillation method creates such high potency cannabis oils. This is because the boiling points of cannabinoids are very high, causing manufacturers to distill at lower temperatures than in other molecular distillation processes. Cannabis distillates, however, are created using a short path distillation technique that differs from a typical solvent extraction. Heat vaporizes the cannabinoids, which is then transferred to a cooling system for consolidation and eventual collection into beakers. This process is repeated over and over again to create pure cannabinoids without chlorophyll, plant matter, or residual solvents.


It’s important to note that after obtaining a solvent-free oil through a CO2 extraction and a winterization or distillation refinement, most of the terpene properties are lost, but they can be re-introduced later by the manufacturer.



In the end, the importance should be placed on the way the oil was refined, not which method was used to refine it. Consumers should pay close attention to the origin of the product to determine whether it was done correctly and if it is of good quality. When choosing products made with distillate or winterized oil, you should be aware that this product is more concentrated, thus having a greater effect on the user.  Always remember to consult a doctor before consuming any medicinal product in order to determine the best product for your condition, as well as to obtain information regarding the correct dosage and strength required.

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