Making Marijuana Concentrate - Hash

Updated: Dec 2, 2018

What is Hash?

Hash, or hashish, is a marijuana concentrate made from the resinous glands (trichomes) of the marijuana plant. It differs from cannabis oil (aka, wax, dabs, etc.) because the trichomes are separated physically rather than chemically, and the bulbous heads and stalks of the trichomes remain in the finished product.


Hash is made by sifting marijuana leaf or flower with a screen or mesh which allows the trichomes to fall through and the plant material to be discarded. The resulting trichomes can then be further processed by pressing, rubbing, or just used directly as desired.


Overview Of The Process

Making hash can be as simple as dry sifting marijuana by rubbing it on a fine nylon mesh or screen, but a higher quality product can be made by honing the technique with some additional time and equipment. The process described here is called ice water hash, sometimes called bubble hash.


The ice water hash process, while an advanced technique, is still rather simple:

  1. Start with dry leaf or flower, frozen

  2. Suspend the material in ice water

  3. Agitate the mixture to break off the trichomes

  4. Strain the ice water through a series of successively smaller mesh screens

  5. Press the trichomes to remove excess water, then air dry

This process is somewhat time consuming, but the result is a very refined concentrate with no visible plant material other than the transparent husk of the intact trichomes.


The Process in Detail

Begin by freezing high quality, dry marijuana leaf or flower for at least 24 hours. High quality leaf is trimmed from high quality marijuana flowers. Do not use leaf without visible trichomes, leaf that has yellowed, or fan leaves from the stalks of the plant.