Cannabis extraction is a process by which desirable chemical compounds are separated from plant material. There are a variety of common extraction methods, including solvent-based methods using butane, propane, ethanol or CO2, as well as non-solvent methods such as water-ice extraction and rosin tech.

The reason why solvent extraction is so effective is that butane and other solvents with extremely low boiling points can extract only the most essential components from herbal matter, producing an oil of the highest quality and leaving undesirable remnants behind. This process is so efficient that it can produce a remarkably high-quality oil from even the lowest quality herbs.