If you're diving into the world of solventless extraction, rosin bags are a must-have. These specially designed filter sleeves are used during a rosin press to hold plant material or hash, keeping unwanted debris out of your final product. By containing excess plant matter, rosin bags help you achieve a much cleaner extraction product, which means better flavour, better appearance, and better results overall.
Whether you're pressing flower, bubble hash, or sift, the right rosin bags paired with a quality rosin press can take your yields and purity to the next level.
Understanding Micron Sizes – What Should You Use?
At SquishTech, we offer six different micron sizes of rosin bags: 25, 37, 70, 90, 120, and 160. The micron size refers to how fine the mesh is — the smaller the number, the finer the filter.
Here’s a breakdown of how to choose the right size for your rosin press setup:
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25 Micron: Ultra-fine mesh, best for pressing bubble hash or ice water extract. Captures even the tiniest particles, delivering an ultra-clean rosin.
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37 Micron: Also used for bubble hash, this size allows slightly faster flow while maintaining high purity.
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70 Micron: Excellent for pressing flower, offering a great balance between filtration and yield.
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90 Micron: Another solid option for flower and plant material, producing clean rosin with good flow.
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120 Micron & 160 Micron: Best for pre-filtering or double-bagging. These sizes provide structural support, especially under high pressure in your rosin press.
How to Use Rosin Bags – Step-by-Step Guide
Using rosin bags correctly with your rosin press makes a big difference in your results. Here’s a step-by-step guide to help you get it right:
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Choose Your First Micron Bag
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Use 25 or 37 micron for ice water extracts (bubble hash)
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Use 70 or 90 micron for flower or plant material
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Turn the Bag Inside Out
This ensures the seam is on the outside, giving you a smoother surface and helping prevent blowouts during pressing. -
Fill Your Rosin Bag
Load your plant material or extract, leaving enough space at the top to fold over. If the bag is too long, trim it down. For flower pressing, we strongly recommend using a mould to pack the material tightly and evenly. -
Prepare a Secondary Filter
Grab a 120 or 160 micron bag, turn it inside out, and use it to wrap around your primary bag. This adds strength and improves the integrity of your press. -
Double Bag & Fold Neatly
Fold over the top of your primary bag and insert it into the secondary filter. Tuck everything in nicely. -
Wrap in Parchment Paper
Place the double-bagged material into high-quality rosin release parchment paper. This keeps your rosin clean and prevents any sticky mess. -
Press It
Place your wrapped bags into the rosin press, apply your preferred temperature and pressure, and enjoy the golden results!
Recommended Rosin Bags to Get Started
Ready to start pressing like a pro? Here are our top recommended rosin bags to get you going:
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👉 1.5" x 3" Rosin Press Bags – Ideal for smaller amounts and compact rosin presses
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👉 2" x 4" Rosin Press Bags – Perfect for larger yields or more heavy-duty setups
And don’t forget your rosin release parchment paper to keep everything clean, smooth, and efficient.
Final Thoughts
Getting the most out of your rosin press starts with the right technique and the right gear. High-quality rosin bags help ensure every press is clean, consistent, and bursting with flavour. Whether you're processing bubble hash or flower, SquishTech has the tools to get you pressing with confidence.
Explore our full range of rosin bags and rosin presses and take your extractions to the next level.
