Water hash—sometimes referred to as bubble hash or ice water hash—represents a new class of cannabis extraction. Unlike other concentrates that use chemical solvents, water hash simply employs ice water to pull off valuable trichomes from plant material.
The Cool Science of Water Hash
The extraction process functions based on a cool principle of trichrome physics. These tiny, mushroom-shaped resin glands that contain cannabinoids and terpenes become extremely brittle when exposed to cold.
The separation occurs through basic density differences—the trichome heads sink, as they are heavier than water, while the lighter plant material floats. This natural separation occurs to isolate high-quality resin without chemical means.
Materials Needed for Your First Extraction
To start, you will want fresh or properly cured cannabis trim or flower, several bags of ice, cold filtered water, and a set of specialized bubble hash bags that come in varying micron screen sizes. Also, have a nice-sized bucket or other container ready for the process, a wooden or food-safe plastic mixing tool, a clean surface free from contaminants, collection materials (small spoons or cards), and drying materials (screen drying racks or parchment paper).
The Extraction Process
Set up your bubble hash bags inside your container, with each bag organized in order of size and in descending order. Put the bag with the finest micron measurement at the bottom. This method sets up a progression of separating material to filter it out.
Place your cannabis material into the top bag and pile a good portion of ice over your cannabis material. Add cold water until the plant material has become completely saturated. Let it rest and sit for approximately 15-20 minutes without stirring or I recommend it for this temperature-play break. This resting step is essential for making the trichomes sufficiently brittle without becoming too brittle.
After a total resting period of about 15-20 minutes, begin gently stirring the mixture with your wooden implement for 10-15 minutes, or longer if you prefer (but consider the quality of your hash). Gently mixing is important—too aggressive of a stir may introduce unwanted plant material to the hash, ultimately affecting its quality and purity. Stirring provides the brittle trichomes the opportunity to separate. The trichomes have become brittle and are moving through the mesh screens.
Harvesting Your Resin Treasure
After you have completed agitating, you will begin to peel off and drain each filter bag one by one, from the bag with the largest micron size to the smallest. The first bag you take off, and the one with the largest micron screen, will mainly hold plant matter and only a little resin, while the bags going down the line are holding progressively more pure trichome material and less plant matter and debris. As you pull each bag off and go through the bag process one at a time you will see the quality of collected resin increasing or improving. The smallest micron bags typically provide the best grade hash, also known as full-melt, which is sought after for its purity. You will want to scrape the resin from each bag using your collection tools and it’s okay to keep the resin grades separated if you wish.
The Critical Drying Phase
Once you collect your resin, you will want to distribute the resin (which should be in lump(s) and some moisture) on clean drying screens or parchment paper, which will be in a cool, dark place and with good circulation. Depending on conditions and humidity in the environment the drying time can take anywhere from one to seven days, or so.
Proper Methods of Storage
After it is fully dried, you will want to store it in dispensaries in cool, dark places that are airtight. Many hash makers like to keep their hash in a refrigerator or whole other freezer to preserve the hash for long-term storage and wrapping it in wax paper to avoid moisture and oxidation issues. Using correct storage methods will help maintain potency and texture loss also loss of terpenes.
Final Thoughts
Making water hash at home is a rewarding way to process cannabis, especially with nothing chemical solvent-related. While it requires patience and attention to detail (and some test trials), its purity and potency will be off the charts if that is how it is marketed.