// Definition
A solventless method of separating cannabis trichome glands from plant material using ice-cold water agitation and filtration through graduated mesh screens. Trichome heads, being denser than water, sink and are captured by micron-graded bags while plant debris floats or is filtered out.
// From the Episode
Bubbleman read from historical records showing Skunkman Sam ran an ad in High Times magazine in 1987 offering instructions for making cold water extracts at home. This ad introduced the method to a wider audience. The principle that trichome glands sink in cold water while plant debris floats was described as revolutionizing solventless hash production in the 1980s underground scene.