Hash rosin is the extraction of the extraction – using pressure, temperature and filter bags to make hash of great purity. It is a double refining that, when done well, generates a very high quality hash and that melts completely when smoked or vaporized, because it does not contain vegetable matter!
Why Hash Rosin?
Many people prefer the cleaner, more natural preparation of rosin because it doesn’t involve the use of solvents, which have traditionally been butane, propane, or other petrochemicals. Finished rosin is solvent-free and can be consumed immediately without the need for careful purging.
More about rosin
Rosin production uses heat and pressure to force the cannabinoids and terpenes out of the trichome glands. Think of it like squeezing the juice from grapes or oil from olives, with the end result being similar to butane hash oil (BHO), but without the harmful chemicals.