Bubble Hash Extraction Tips: Ice Water Method Guide

Bubble hash extraction separates trichome heads from cannabis plant material with ice, water, and a stack of micron bags. Four variables control the result: water temperature, agitation time, bag mesh size, and drying speed. Water at 32 to 39°F, short wash cycles, and fast drying give the lightest hash.

how to make cannabis bubble hash

Material and setup

• Material: fresh frozen trim, or dried and cured flower. Dried material should sit at 10 to 12 percent moisture.
• Water: reverse osmosis or distilled. Tap minerals add taste.
• Bags: a 220 micron work bag plus 190, 160, 120, 90, 73, 45, and 25 micron collection bags.
• Ice: about 1 part ice to 2 parts water by volume.
• Room: 55 to 65°F. A warm room raises bucket temperature within minutes.

Wash cycle order

1. Pre-chill water and buckets for 12 hours.
2. Place 100 to 200 g dried material, or 300 to 500 g fresh frozen, in the 220 bag inside the bucket.
3. Add water and ice. Soak 10 to 15 minutes.
4. Agitate 3 to 5 minutes for wash one with a paddle at low speed.
5. Pull the bag, drain 30 seconds, then repeat in clean cold water. Wash two runs 5 to 8 minutes. Wash three runs 8 to 12 minutes.
6. Pour the wash water through the bag stack. Rinse each bag with cold water from the top down.
7. Scoop each grade onto a 25 micron screen. Keep grades separate by micron.

Stop when the water runs clear or a cycle yields below 10 percent of cycle one. Extra cycles pull plant fiber.

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Temperature control

Keep the slurry between 32 and 39°F. Water above 45°F softens trichome heads, and agitation then smears them into plant material. Chlorophyll release rises with temperature and turns hash green. Add ice between cycles and work in a cold room when possible.

Ice Water Hash Cannabis

Agitation: less is more

Trichome heads break off with light turbulence. Heavy mixing chops leaf and stem into pieces that pass the 120 and 90 micron bags. Signs of over-agitation: green tint, plant smell, and dark specks in the 73 micron grade. Cut cycle length before you cut bag size.

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Drying

• Freeze dryer: 24 to 48 hours. Best color and terpene retention.
• Air dry: sieve hash onto cardboard or parchment. Hold 55 to 60°F and 30 to 40 percent humidity for 5 to 7 days.

Turn the hash once per day with a cold spoon. It is dry when it crumbles and does not smudge between fingers. Pack dry hash into glass jars and store at 35 to 45°F in the dark.

Grading

73 to 120 micron grades melt best and hold the most resin. 25 to 45 micron grades hold more plant matter; use them for edibles or tincture. Label each jar by strain, micron, and wash date.

Common mistakes

• Warm water.
• Long first wash.
• Overloading the work bag. Keep material below half the bag volume.
• Dirty bags. Rinse between cycles.
• Drying in a warm room, which traps moisture inside the patty.