Rosin

Rosin refers to solventless cannabis concentrates made through heated pressure extraction. Plant material like flower buds or dry sift hash is placed in a bag, parchment paper, or between two solid heating plates. Applying heat up to 300°F combined with pressure up to 1000psi forces out pure, flavorful oils from the compressed trichome heads. The oil flows out and can be collected as an extract, while the spent plant material remains as a puck.

The benefits of rosin stem from its purely mechanical production. No solvents like butane or CO2 are needed to extract oils. This preserves the natural terpene aroma and flavor better than hydrocarbon methods involving heat and chemicals. It also ensures no chance of residual solvents in the final product. Rosin is considered a solventless extract since water and heat provide the only work. Solventless also means no equipment for purging like vacuums or pumps. Rosin simply uses presses - either hand clamp style or large industrial - making production straightforward.

The oils extracted via rosin consist mainly of cannabinoids like THC and CBD, but retain the full spectrum of aromatic terpenes found in the starting material at levels closer to raw flower than any other concentrate. This makes rosin popular for dabbing, since flash vaporizing on a nail delivers robust flavor. Rosin can also be used to make infused topicals, edibles, and vape cartridges.

Solventless rosin stands apart from other concentrates like wax, shatter, live resin and more that utilize butane, propane, CO2 or chemicals to strip plants. When crafted carefully, rosin affords connoisseur-level quality across aroma, taste, and sheer purity. While rosin yields are lower than other methods, the trade off in unadulterated flavor often makes it worth the lower volume.