// Definition
A solventless extraction method where cannabis is agitated in ice-cold water to separate trichome heads from plant material. The mixture is then filtered through progressively finer mesh screens (bubble bags) to isolate different grades of hash by micron size.
// From the Episode
Core topic across multiple episodes. Bubbleman shows ice water hash made in Quebec. The technique uses Bubble Bags to filter trichomes at different micron sizes.