What is full melt hash?

TL;DR: Full melt hash is the highest grade of solventless hash. It is made from cannabis trichomes that are pure enough to liquefy completely and bubble away to nothing when heated on a dab nail or a hot surface. No char, no ash, no plant matter. Just pure resin. It is the top tier of the solventless rating scale, usually called 6-star hash.

Most hash leaves a stain or a small amount of black residue when smoked. Full melt does not. It melts into a clear amber puddle, vapes off completely, and the dab nail wipes clean. Thats the whole definition.

What is the hash star rating system?

• 1–2 star: Contaminant grade. Lots of plant matter, doesnt melt. Best for cooking or pressed hash use.
• 3–4 star: Mid-grade. Some melt, leaves residue. Common smokable bubble hash quality.
• 5 star: Half melt. Melts mostly but leaves a small ring of residue when dabbed.
• 6 star: Full melt. Melts completely and cleanly. The grade most dab heads chase.

The scale comes from the bubble hash world (ice water extraction) but the same principle applies to dry sift. The cleaner the trichome head separation, the higher the grade. More on the wash side in our bubble hash guide and the dry side in our dry sift guide.

How is full melt hash made?

Two main paths produce full melt grade material:

• Ice water (bubble hash): Fresh-frozen or carefully dried flower is agitated in ice water. Trichome heads sink, plant matter floats. The wash is collected through micron bags (typically 73–90 micron mesh for full melt). The result is freeze-dried and graded.
• Dry sift: Cured flower is rubbed over a series of progressively finer screens (silk screens at 73–100 micron). Only the cleanest trichome heads pass through the finest screen.

Both methods require lab-grade input flower, cold processing, and careful sieving. You cant make full melt from low-grade material. Garbage in, garbage out.

Why is the trichome head the important part?

Cannabis trichomes are mushroom-shaped resin glands. The head (top) holds the cannabinoids and terpenes. The stalk is plant matter. Full melt is mostly intact, isolated heads. When heated, the lipid membrane melts, the resin inside flows, and everything vaporizes. Plant matter doesnt vaporize at the same temperature, so it leaves behind char.

How do you smoke full melt hash?

• Dabbing: The standard. Use a 350–450°F dab nail. Place a small piece, watch it melt and bubble, inhale the vapor.
• Vape pen / e-rig: Set the temp in the 350–450°F range. Lower preserves terps.
• Sprinkled on flower: Works but wastes the grade. Full melt is too refined to mix with combusted flower.
• Pin / nail technique: Old-school. Pinch a piece onto a hot pin under a glass, capture the vapor.

More on all 7 methods in our how to smoke hash guide.

What does full melt look like?

• Color: Pale gold to deep amber. Lighter usually means cleaner and less oxidized.
• Texture: Sandy and slightly oily but free-flowing. Not chunky, not packed.
• Aroma: Loud terps — the exact terpene profile of the source strain, often more concentrated than the flower itself.

What does full melt taste like?

Pure strain terpenes. If the source flower was Papaya Punch, you taste tropical fruit. If it was Garlic Cookies, you taste savory funk. Theres no plant-matter burn, no char taste, and no hash earthiness to hide behind — just the strain. Thats both the appeal and the test: bad terps cant hide in full melt.

How much does full melt hash cost?

• 5-star (half melt): $30–60 per gram
• 6-star (full melt): $60–100+ per gram
• Top shelf single-strain full melt: $100–150 per gram for limited drops

Its expensive because the yield is low. A pound of flower might produce only 10–20 grams of full-melt-grade hash, even with perfect technique. Most washes top out at 5-star with a small full-melt fraction siphoned off.

Is full melt better than rosin?

Different formats. Both are solventless. Full melt is the raw trichome heads as a sandy material. Rosin is full melt (or near-full-melt) hash that has been pressed under heat and pressure into a sappy, melty consistency. Most premium hash rosin starts as full melt.

• Full melt hash: Sandy/granular texture, requires dabbing or vaping
• Hash rosin: Pressed full melt, sappy/melty, easier to handle and dab

Most full melt gets pressed into rosin because rosin is easier to dose and dab. See hash rosin vs flower rosin for the press details.

How do you tell if hash is actually full melt?

1. Put a small piece on a clean glass dab nail at 400°F
2. Watch it. Full melt liquefies, bubbles, and vaporizes off completely within 5–10 seconds with no residue
3. Wipe the nail. If anything stays behind, it wasnt true 6-star

Sellers sometimes mis-label. The dab nail test is the only objective check.

How do you store full melt hash?

• Cool, dark, airtight — glass jar or silicone container
• Avoid heat and sun — terpenes evaporate fast, color darkens to amber/brown
• Fridge or freezer: Best for long-term. Let it warm to room temp before opening to avoid condensation.

More on storage in our best ways to store hash breakdown.

Last updated: June 19, 2026

Sources

• Bubbleman / Frenchy Cannoli — historical bubble hash star rating system and full melt definitions
• Health Canada — cannabis extract regulation classification (concentrates and resins)
• Industry COA practices — trichome head purity testing standards

Related Hash Guides

• What Is Bubble Hash
• What Is Dry Sift Hash
• Hash Rosin vs Flower Rosin
• Best Ways to Store Hash