Professional Marijuana Grower November-December 2018 Issue | Page 14
Ice Water Hash
Let’s get
growing
naturally
Strictly speaking, ice water is the solvent used in this ex-
traction method. However, using ice water for extraction
is extremely safe and there are no potentially harmful
residuals left behind by the “solvent”. To make ice water
hash, the plant material (usually fresh, but dried can also
be used) is mixed with ice water to get the trichomes
cold. A series of bags, each with a different size mesh
bottom is placed in the holding container before mix-
ing begins. Many processors use a fi ve gallon bucket,
a plastic garbage bin, or some other non-permeable
holding container. After vigorously mixing the ice water
to remove the trichomes from the plant material, the bags
are lifted out one at a time to strain the plant material.
The fi rst bag with the largest size screen is removed fi rst.
This bag will contain the majority of the plant material.
The other bags are lifted in order. The fi nal bag in the
series has the smallest size screen and will contain the
highest concentration of THC and other cannabinoids.
The extract collected from each bag can be dried and
sorted by grade (the smallest size screen will have the
highest potency). Once the extracted hash has dried
completely, it can be enjoyed like other hashes.
Rosin
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The most exciting non-solvent cannabis extract to hit the
market is rosin. Rosin is a solid form cannabis extract
made by applying pressure and heat to the cannabis
fl owers in order to vaporize volatile liquid terpenes.
Essentially, rosin is made when the cannabis material is
put under extreme pressure, while also being heated to
a desirable temperature (somewhere between 250-335
degrees F). Rosin has a similar potency to many of the
popular solvent-based extracts, but without the potential
dangers associated with the solvents during process-
ing or as residuals. For these reasons, rosin is steadily
growing in popularity among processors and consum-
ers. Rosin is also signifi cantly less expensive to produce
than most solvent-based methods, making it even more
appealing.
Extracting with a Solvent
Extracting cannabis with a solvent can include many
techniques and various solvents. Advanced chemical
14 • Professional Marijuana Grower
November/December 2018