What it is
Rosin is made with nothing but heat and pressure: flower, kief or bubble hash is squeezed between heated plates and the oil flows out. No solvents anywhere in the process — the technique that democratized concentrate making.
How it's made
Flower rosin presses dried buds directly. Hash rosin — the connoisseur standard — presses ice-water hash at low temperature, yielding a lighter, cleaner, more potent extract. Micron bags keep plant material out of the oil.
How it's used
Dab at low temperature (230–260°C surface) for flavor, or cold-start. Also excellent in a concentrate vaporizer.
The terpene story
High — low-temperature pressing keeps them volatile and loud