Cannabis bubble hash is a solventless cannabis concentrate made by agitating plant material in ice water and filtering it through micron screens so resin-rich trichomes collect into a soft, sandy hash. No butane, ethanol, or other chemical solvents are used. The finished product ranges from a crumbly powder to a sticky, meltable resin, depending on screen size and starting material.
How is bubble hash made?
Bubble hash, also called ice water hash or bubble melt, depends on cold and gentle agitation. Ice makes trichomes brittle so they snap off the flower, and water carries them through a stack of filter bags.
- Fill a bucket with ice, cold water, and cannabis flower or trim.
- Stir gently for 10 to 20 minutes to free trichomes without shredding plant matter.
- Pour the slurry through stacked micron bags, often 220, 160, 120, 90, 73, 45, and 25 microns.
- Scoop each bag's resin onto a drying screen and air dry it in a cool, dark room.
- Sieve or press the dried hash, then cure it for a smoother texture.
What do the micron sizes mean?
Smaller micron numbers capture finer resin heads. The 73 to 120 micron range often gives the highest quality, called full melt because it bubbles and dissolves almost completely on a hot nail. The 160 to 220 micron range is coarser and darker, and it works well for edibles or tinctures.
Is bubble hash the same as CBD hash?
The extraction method is identical, but the starting plant differs. Hemp flower with high CBD and low THC produces CBD bubble hash that does not cause a strong psychoactive high, while marijuana-derived hash is THC-rich.
Are cannabis and CBD bubble hash legal in the US?
Federal law treats hemp and marijuana differently. Bubble hash made from hemp that stays at or below 0.3% THC by dry weight is legal under the 2018 Farm Bill. Hash made from marijuana remains illegal federally, though many states allow it for medical or adult use.
How do you use and store bubble hash?
Bubble hash can be crumbled into a bowl, vaped in a concentrate device, or pressed into rosin with heat and pressure. Start with a small amount because concentrates are potent by weight. Store it in an airtight glass jar away from light, heat, and moisture to protect terpenes and prevent mold.