What Full Melt Means
Full melt is hash that turns to liquid when heated and leaves little residue. The term describes a grade, not a strain or a product type. A sample earns the label when the resin heads liquefy on a hot surface and burn clean. Hash that leaves char or ash behind is partial melt.
How Full Melt Is Made
Most full melt comes from ice water extraction, also called bubble hash. Growers freeze cannabis material in water with ice, then stir it. Cold makes the resin glands brittle, so they break off the plant matter. The mix passes through a stack of filter bags. Bag screens measured in microns catch different sizes of resin heads.
Resin heads in the 70 to 120 micron range hold the most oil and the least plant fiber. Those screens produce the best melt. Material from 160 micron and above holds more leaf and stalk. After collection, the hash dries for several days at low temperature and low humidity. Water left in the resin causes mold and kills the melt.
Star Ratings
Concentrate makers rate melt on a 1 to 6 star scale. Six star hash leaves no residue. Five star leaves a light ring. Three star and below leaves char.
How to Check
- Put a small piece on a hot nail or banger at 400F to 500F.
- Watch for a bubble and a clear puddle.
- Wipe the surface with a swab and look at the stain.
Full Melt vs Rosin
Rosin is pressed from hash or flower with heat and pressure. Full melt hash is the starting material for high grade rosin. Both are solventless. Rosin yields more per gram of input. Full melt keeps more of the original resin structure and terpenes.
CBD Full Melt
Hemp growers make full melt from CBD-rich flower. Federal law caps hemp at 0.3% THC on a dry weight basis. Ask for a lab report with a cannabinoid panel and a terpene panel. The report should list the batch number and the harvest date.
Storage
Store full melt in a glass jar in a refrigerator at 35F to 40F. Keep it sealed. Air, light, and heat degrade terpenes. Let the jar reach room temperature before opening to stop condensation.