Hashish, or hash, is a drug made from the resin of the cannabis plant.[2] It is consumed by inhaling from a small piece, typically in a pipe, bongvaporizer or joint, or via oral ingestion (after decarboxylation). As pure hashish will not burn if rolled alone in a joint, it is typically mixed with herbal cannabis, tobacco or another type of herb for this method of consumption.[citation needed] Depending on region or country, multiple synonyms and alternative names exist.[3]

Hash is a cannabis concentrate product composed of compressed or purified preparations of stalked resin glands, called trichomes, from the plant. It is defined by the 1961 UN Single Convention on Narcotic Drugs (Schedule I and IV) as “the separated resin, whether crude or purified, obtained from the cannabis plant”. The resin contains ingredients such as tetrahydrocannabinol (THC) and other cannabinoids—but often in higher concentrations than the unsifted or unprocessed cannabis flower.[4] Purities of confiscated hashish in Europe (2011) range between 4% and 15%. Between 2000 and 2005 the percentage of hashish in cannabis end product seizures was at 18%

Hash comes from trichomes, the ripe, resinous gland heads that line the surface of cannabis plants. Processes to achieve resin separation have been practiced for centuries, however, the rapid rise of cannabis legalization in the Western world has brought new methods in hash preparation that are sweeping legal markets by storm.

The dry sift screen method

  • Start with properly cured frozen material. It’s important to get your temperature as low as possible because frozen trichomes will break off their stocks and separate from the plant material more easily.
  • Once you get your material on the screen, start breaking it up and spreading it around; wax on, wax off.
  • Dry sifting on a screen is a very delicate process. You’re not going for quantity, but quality, and expect a very low return. As long as you’re careful, it should be a very high quality.

The dry ice method

  • Combine your plant material with about 40% dry ice. Dry ice is five times cooler than regular ice, about -109°F. These super cold temperatures combined with friction caused by shaking the bag will cause the trichomes to break off their stocks and fall into the collection vessel below.
  • The longer we shake, the more plant material will break up and make its way through the screen, contaminating your kief. This is why old school methods of making hash are as much of an art form as they are a science.
  • It takes practice working with different strings to get the feel for the right time to stop. You want to maximize yield without sacrificing quality.
  • When satisfied with the shake, it’s time to collect.

You can see the difference in quality between the two methods: The dry sift is a beautiful golden color whereas the dry ice has been contaminated with some plant material, making it green.

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