If you're new to rosin press extraction or just looking to optimize your results, one of the most important decisions you'll make is choosing the right micron size for your filter bags. The micron rating determines how fine or coarse the mesh is — and it directly impacts the quality and yield of your extract.
At Pressdeals, we offer four micron sizes: 25, 73, 90, and 120 microns. Here's everything you need to know to choose the right one.
What Is a Micron?
A micron (µm) is a unit of measurement equal to one millionth of a meter. In the context of filter bags, it refers to the size of the openings in the mesh. The smaller the number, the finer the filtration — meaning fewer particles pass through, resulting in a cleaner but potentially lower-yield extract.
25 Micron — Ultra-Fine Filtration
The 25 micron is the finest filter in our lineup. It captures even the smallest plant particles, producing an exceptionally clean and pure extract. This comes at the cost of yield — less material passes through — making it ideal for users who prioritize quality above all else.
Best for: Ultra-pure rosin, fresh frozen flower, finely ground material, premium single-press extracts
73 Micron — Fine & Precise
The 73 micron is a fine-filtration option that delivers a clean, high-quality extract while allowing for better flow-through than the 25 micron. It's a great choice for flower rosin and hash pressing when quality is the priority.
Best for: Flower rosin, premium-quality extracts, users prioritizing purity over yield
90 Micron — Balanced Performance
The 90 micron sits right in the middle — offering a great balance between filtration quality and yield. It allows more material to pass through than the 73 micron while still producing a clean extract. A versatile choice for a wide range of applications.
Best for: Flower rosin, herb and plant pressing, extractors who want quality without sacrificing output.
120 Micron — Maximum Yield (Our Best-Seller)
The 120 micron is our most popular filter bag. With the most open mesh in our lineup, it delivers maximum yield and fast flow-through — perfect for high-volume extraction, brewing, and general filtration. If you want to get the most out of every press, this is your go-to.
Best for: High-yield rosin pressing, large batches, commercial and high-volume extraction
Quick Comparison Chart
| Micron | Filtration | Yield | Best Use |
|---|---|---|---|
| 25 µm | Ultra-fine | Lower | Cold-water hash, pure extracts |
| 73 µm | Fine | Medium | Flower rosin |
| 90 µm | Medium-fine | Medium-high | Herb pressing, essential oils |
| 120 µm | Standard | Maximum | High-volume, brewing, infusions |
Still Not Sure Which to Choose?
A good rule of thumb: if you're pressing flower and want the cleanest result, go with 25 or 73 micron. If you want maximum yield and fast processing, the 120 micron is your best bet. The 90 micron is a great all-rounder if you're still experimenting.
Have questions? Feel free to reach out — we're happy to help you find the right filter for your setup.