How to Use Rosin Filter Bags Correctly?

Using rosin  filter bags (also called filter bags or micron bags) properly is essential for achieving clean, high-quality rosin when pressing flower, hash, or kief. 

Here’s a step-by-step guide to using them correctly:

1. Choose the Right Micron Size

•     Flower (buds): Use 90μ–160μ bags for a balance of yield and filtration.

•     Hash/Kief: Use 25μ–90μ bags to filter out fine plant material.

•     Lower microns filter more but may reduce yield; higher microns allow more lipids/waxes but increase yield.

2. Pack the Bag Properly

• Bottle Tech (Best for Flower):

• Fold the top of the bag outward to create a "bottle neck."

• Fill the bag loosely (don’t overpack) to allow even heat and pressure distribution.

• Fold the excess bag material neatly to avoid uneven pressure.

• Chottle Tech (Simplified):

• Cut off the top of the bag, leaving just enough to fold over.

• Pack material inside and fold the edges to prevent blowouts.

• Hash/Kief:

• Lightly press the material into a flat "puck" before bagging.

• Avoid overfilling to prevent leaks.

3. Pre-Press the Bag (Optional)

•    Use a pre-press mold or your hands to lightly compact the material before pressing.

•    This helps prevent blowouts and improves heat distribution.

4. Set Up Your Rosin Press

•    Temperature:

• Flower: 160°F–220°F (lower temps = better flavor, higher temps = more yield).

• Hash/Kief: 150°F–190°F (lower temps preserve terpenes).

•    Pressure: Start low and gradually increase to avoid burst bags.

•    Time: 1–3 minutes (longer presses may degrade quality).

5. Press the Rosin

•    Place the bag between parchment paper (not wax paper!).

•    Apply gradual pressure—don’t smash too hard at first.

•    Use even pressure across the plates to prevent blowouts.

•    Collect the rosin as it oozes out.

6. Avoid Common Mistakes

•    Overpacking: Leads to poor extraction and blowouts.

•    Too High Pressure: Can burst the bag, contaminating rosin.

•    Wrong Micron: Too fine = low yield; too coarse = dirty rosin.

•    Reusing Bags: Can introduce contaminants—use fresh bags each time.

7. Post-Pressing Tips

•    Cold Cure (Optional): Store rosin in a cool, dark place to improve consistency.

•    Clean Up: Remove leftover "puck" from the bag (can be used for edibles or extracts).

   Final Thoughts

•    Experiment with temps, microns, and packing styles to find your ideal setup.

•    Quality in = Quality out—use fresh, high-grade starting material.