How to select the right size rosin filter bags for rosin press plates?

Selecting the right size rosin filter bags for your rosin press plates is crucial for optimizing yield, quality, and efficiency. Here’s a step-by-step guide to help you choose the correct size:

1. Match the Bag Width to Your Plate Size

The width of the filter bag should be slightly smaller than the width of your rosin press plates to ensure even pressure distribution.

Example:

2x4” plates → Use 2x4” or 2.5x4.5” bags (allows for some overhang)

3x5” plates → Use 3x5” or 2.5x4.5” bags

4x7” plates → Use 4x7” or 3.5x6” bags

2. Consider the Bag Height (Length)

The height (or length) of the bag should allow enough space for your material while leaving room for folding/sealing.

Common heights: 4”, 6”, 7”, 9”

For bottle tech style (bottle-shaped packing), taller bags (6”-9”) work best.

3. Choose the Right Micron Size

25-37µ – Best for hash/kief (fine particles need tighter filtration).

90-120µ – Ideal for flower (balances yield and purity).

160-220µ – Best for lower-quality material (higher yield but more contaminants).

4. Material & Bag Style

Nylon vs. Stainless Steel Mesh:

Nylon (most common, disposable, good for heat resistance).

Stainless Steel (reusable, but may require more pressure).

Pre-cut vs. Roll Bags:

Pre-cut – Convenient for standard presses.

Roll bags – Customizable for different sizes.

5. Packing Method Matters

Bottle Tech (Vertical Packing):

Uses taller bags (6”-9”) packed in a cylinder shape.

Works well with 2x4” or 3x5” plates.

Chottle Tech (Open-Ended):

Uses shorter bags with one open end for better flow.

Flat Pack (Horizontal):

Fits material in a flat layer (better for larger plates like 4x7”).

6. Avoid Overfilling

A general rule: Don’t fill beyond 0.5-1.5 inches thick (depends on press pressure).

Overfilling can lead to blowouts or uneven extraction.

Recommended Sizes Based on Plate Size

Press Plate Size Recommended Filter Bag Size Best Use Case

2x3” 2x4”, 2.5x4.5” Small personal presses

3x5” 3x5”, 2.5x4.5” Medium presses, bottle tech

4x7” 4x7”, 3.5x6” Large presses, flat pack

5x9” 5x9”, 4.5x8” Commercial presses

Final Tips

Test different sizes to see what works best for your material.

Double-bagging (using two bags) can help prevent blowouts with sticky material.

Pre-press molds can help shape material for better bag fit.

By matching your filter bag size to your press plates and packing method, you’ll maximize rosin yield and quality while minimizing waste