Bubble Extraction Bags

Ice water, a bucket, no solvent

You do not need butane or a sealed room for this method. Resin glands snap off more readily than leaf once they are cold and brittle, so ice water plus agitation knocks them free and they sink. The slurry then runs through a mesh stack; each bag holds back a different size of material. A bucket, ice and a set of bags is the whole setup.

Reading the micron sizes

Mesh opening is measured in microns — a thousandth of a millimetre. The 220 and 160 bags sit at the top as work and contaminant screens: they keep leaf and stem, and everything smaller falls through. The quality fraction usually lands on the middle screens; 73 micron is the classic collection bag, and that is where full-melt shows up when the material is good. 45 and 25 micron catch the smallest heads — a lower grade, still worth keeping.

The range

Cold Filter wash sets. Four 19L (5gal) kits, colour-coded polymer screens and drawstrings that cinch over a bucket or pail. Configurations run 3-bag (25-73-220 micron), 4-bag (25-73-160-220), 5-bag (25-73-120-160-220) and the full 8-bag (25-45-73-90-120-160-190-220). The mesh is acid-base resistant; a carry bag and a pressing screen come with every set.

Complete kits. If you want the bags plus the extras in one box, the Bubble Bag Sift Kit is a 20L 4-bag set on monoprint polyethylene: 220 work, 160 contaminant, 73 and 25 collection, plus a silicone mat, a 5g platinum puck and a picture instruction guide. The other boxed option is the CO2 Dry Ice Extraction Kit — 220 and 120 micron 20L screening bags, a 10L mixing bucket set and a T-press. Dry ice is bought separately from any gas supplier.

Rosin press bags. These are not wash bags. The 8cm x 14cm nylon pouches, packs of 10, sit inside a rosin press so heat and pressure can push oil out through the mesh. Use 25 micron for dry sift, 45 micron for bubble hash and 90 micron for flower — match the bag to the material going into the press, not to the wash you ran.

Getting a clean wash

1. Keep it cold. Ice in the water and cold material both count — warm resin smears instead of snapping off, and the wash clouds with plant matter.
2. Coarse first, fine last. The largest micron bag goes in the bucket first; the finest sits at the bottom. Lift each bag in turn and collect what it holds.
3. Ease off the stir. Longer, harder agitation lifts yield and drops quality, because plant tissue tears along with the resin.
4. Dry it out. Fresh hash is wet. Spread it thin, dry it cold, and only press or store once it is fully dry.
5. Rinse while they are wet. Screens clog from the resin side out. Rinse in cold water straight after the wash, hang them to dry, and a set lasts years.

A wash set is a straightforward way into concentrates. Pair it with a rosin press and you can take flower to pressed hash without a solvent. The rest of the post-harvest line is on the Harvest & Extraction page.