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A micron screen is frequently used to filter out the trichomes from the plant matter during the hashish or kief extraction process. The finished product’s fineness or coarseness is set by the micron screen size.
The process of making dry sift hashish, also known as bubble hashish, requires a micron screen, which is a very tiny mesh screen. One micron, or one-millionth of a meter, is the standard unit of measurement for screen opening size.
Plant material is agitated over a sequence of screens with increasingly finer micron grades, with the goal of removing as many impurities from the final product as possible. Dry sifting with a micron screen produces kief, whereas using bubble bags and ice water produces bubble hash.