Bubble Bags

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Micron Filter Bags for Cold Water Extraction Micron filter bags (commonly called bubble bags) are the filtration component of cold water extraction setups - mesh screens in specific micron ratings that separate fine particulate from plant material and from each other by particle size. Each bag in a graduated set collects a different size fraction of the extracted material, allowing multi-grade collection from a single extraction run. Individual bags are purchased to replace worn bags in an existing set, to add specific micron grades not included in the original kit, or to restock the highest-use bag sizes that wear out first. For complete bag sets, see our extraction bag kits collection . Micron Rating Guide The micron number describes the mesh opening size in micrometers. Key grades for cold water extraction: 220 micron - work bag, retains plant material; 160 micron - catches larger particles; 120 micron - upper quality range; 73 micron - primary quality collection grade where the finest particulate concentrates; 45 micron - secondary fine collection; 25 micron - finest grade. The 73-micron bag is typically the highest-volume collection grade and wears out fastest in production use - individual bag replacement allows restocking this grade without replacing the full set. Bag Construction Quality Bag seam strength is the primary quality differentiator between economy and commercial-grade extraction bags. The seam that joins the mesh panel to the bag body must withstand repeated mechanical stress from agitation and wringing of wet material. Double-stitched and heat-sealed seams outperform single-stitch seams in commercial applications where bags are used multiple times per day. Mesh panel quality (warp and weft density, filament diameter) determines how long the bag maintains its rated micron opening size before the mesh distorts from use. Fast shipping. Related Guides & Resources Learning Center Solventless Extraction: Step-by-Step Guide Shop by Category Cold Wat