Cannabis concentrates are made by extracting the desire cannabinoids (THC, CBD, CBN....) from cannabis flowers (aka Weed). The most common method of extraction is using a solvent, such as CO2 or ethanol. The cannabis plant material is placed in a chamber and exposed to the solvent, which strips away the cannabinoids, terpenes, and other active compounds. The resulting concentrate is typically much higher in THC than the original plant material. Solvent-based Concentrates are usually averaging around 60%-80% THC.
Another popular method of extraction is called rosin pressing. This technique is solventless, uses heat and pressure to extract the active compounds from the plant material, and does not require the use of any solvents. As a result, rosin pressing is generally considered to be a safer and more environmentally-friendly method of extraction.