Kief is the residue left over after cannabis flower has been ground or shaken. Kief has a similar appearance to flower pollen. When collected, and consumed through burning, vaporizing or made into hash, kief is much more potent than unprocessed plant matter.

Butane Hash Oil (BHO) is the extraction of cannabis trichomes using butane. The butane helps to remove trichomes from the leaves while under pressure and evaporates leaving a glass-like concentrate. This method yields a very high concentration of cannabinoids, 70-90%. This extraction method is one that can be done at home, however it can be very dangerous. Using liquid butane can ignite in a closed space causing an explosion so don’t do this inside your house. Another danger is the residue that comes from the butane itself often containing heavy metals and traces of the butane.

Rosin has gained popularity because it uses pressure and heat rather than solvents to make the concentrate. The plant matter, kief or hash are placed on a heated press where the highly concentrated trichomes are squeezed out of the pressed material. This method is popular because it can be done at home with a hot iron or in an industrial press in a cannabis processing facility. The rosin has a similar potency to if not higher than the 70-90% achieved by BHO or CO2 extraction.