To make hash rosin, you start with cannabis flower or hash, which is rich in trichomes (the resin glands that contain cannabinoids and terpenes). The material is placed between two heated plates, usually with parchment paper to catch the resin. When the plates press together, the heat melts the trichomes, and the pressure forces the sticky, golden resin out of the cannabis. This resin is then collected, cooled, and solidified, resulting in a clean, potent concentrate. The entire process uses only heat and pressure—no solvents—making it a simple and natural way to extract the best parts of the plant.