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Bubble Bags

Bubble Bags dry sift screen sets separate resin from dried plant material by sifting it across stacked mesh screens, with no water or solvent involved. Each screen is monofilament polyester mesh, pre-stretched for uniform tension and bonded to a corrosion-resistant 6063 T5 aluminum frame.

The four-screen sets step down from 250 to 165, 149 and 75 microns and come in Medium (26 by 12 by 2 inches per screen) or Large (36 by 25 by 2 inches). The Large two-screen set carries only the 149 and 75 micron screens for a simpler two-grade sift.

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Buyer's Guide

Bubble Bags: Complete Guide

Choosing a Bubble Bags Dry Sift Screen Set

Despite the brand name, the Bubble Bags products here are dry sift screens, not ice water filter bags. Dry sifting works on dried material: it is rubbed or tapped across a screen, resin glands fall through the mesh, and coarser plant matter stays on top. Stacking screens of different micron ratings sorts what falls through into grades, with the cleanest resin usually collected on the finer screens. If you wash with ice water instead, bubble hash bags for ice water washing are the tool for that job.

Medium or Large, Two Screens or Four?

All three Bubble Bags sets share the same mesh, frame and glue, so the decision is about screen area and how many grades you want to separate.

  • Medium four-screen set: 26 by 12 inch screens at 250, 165, 149 and 75 microns. It fits a smaller bench and smaller batches (e.g., the Medium 4 Screen Set).
  • Large four-screen set: the same four micron ratings on 36 by 25 inch screens, giving far more surface area for larger harvests (e.g., the Large 4 Screen Set).
  • Large two-screen set: a 149 micron top screen over a 75 micron bottom screen at the Large size, for a simpler two-stage sift without the coarse upper screens (e.g., the Large 2 Screen Set).

The four-screen sets suit sifters who want to see the full spread of grades; the two-screen set suits anyone who already knows which grade they keep.

What the Build Means in Use

  • Pre-stretched mesh: each screen is stretched on automatic machines before it is glued, so tension is even across the frame and the mesh does not sag in the middle.
  • Monofilament polyester: a single-strand mesh holds its micron opening and stands up to repeated brushing.
  • Aluminum frames and industrial glue: the 6063 T5 alloy frames resist corrosion and meet ROHS standards, and the mesh is bonded with Chemond 2000-HTA and KIWO adhesives.
  • Use during trimming: a screen under the trim station also catches resin that falls off while you work.

For technique, from material prep to grading by micron, read dry sift hash explained. If hand sifting turns into the bottleneck, dry sift tumblers automate the agitation for larger volumes.

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Frequently Asked Questions

Are Bubble Bags dry sift screens the same as bubble hash bags?
No. These are framed screens for dry sifting dried material, with no water involved. Bubble hash bags are mesh bags used in an ice water wash. The two methods need different equipment, even though both sort resin by micron size.
What micron sizes come in the four-screen sets?
Both four-screen sets, Medium and Large, use a 250 micron top screen (60 lines per inch), then 165 micron (90 lines per inch), 149 micron (110 lines per inch) and a 75 micron bottom screen (200 lines per inch).
How big are the screens?
Medium screens measure 26 by 12 by 2 inches each. Large screens measure 36 by 25 by 2 inches each, in both the four-screen and the two-screen Large sets. Choose by bench space and how much material you sift at once.
Which screens are in the Large two-screen set?
A 149 micron top screen (110 lines per inch) and a 75 micron bottom screen (200 lines per inch), both at the Large 36 by 25 inch size. It skips the 250 and 165 micron screens of the four-screen sets.
How do I clean dry sift screens?
Use a soft-bristled brush and 99% isopropyl alcohol to gently lift remaining resin and debris from the mesh. Let the screens dry completely before stacking or storing them, so no moisture is trapped against the mesh.
Why does pre-stretched mesh matter?
Pre-stretching gives the mesh uniform tension across the whole frame. A screen that sags sorts unevenly, because material pools in the low spot, so even tension keeps sifting results consistent from batch to batch.
Will the frames rust?
The frames are 6063 T5 aluminum alloy, which resists corrosion, and they meet ROHS standards. Cleaning with isopropyl alcohol and drying the screens fully before storage keeps the frames and mesh in good condition.
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