25µ
Fine Filtration
- Best for
- Bubble hash and kief
- Quality
- Highest purity
- Yield
- Lower yield
Filtration
Relative yield
Rosin Technologies Education
Choose a micron, filter dimension, preparation style, and single- or double-filter method around your material, quality target, production pace, and tolerance for risk.
Start with the process
Choosing the right filter for the job can be overwhelming. We designed this guide to help you select the micron size, filter dimensions, and combination of filters that best fit your situation.
Rosin Technologies filters are manufactured from high-strength, heat-resistant, food-grade nylon mesh designed for solventless extraction. Our sewn filters are tightly stitched to help prevent contaminant leakage and bag failures.
01 · Choose the right micron
Lower-micron filters produce cleaner rosin by retaining more fine particulate, while larger-micron filters provide greater strength and can increase yield. The ideal micron—or combination of different micron filters—depends on your starting material, consumables budget, and production goals.
02 · Match filter size to the load
3.5–5 g flower capacity
2–8 g concentrate capacity
Quality-first craft production, personal pressing, and R&D.
Shop Thin & Skinny Filters →6–10 g flower capacity
2–18 g concentrate capacity
Quality-focused small batches with a path to scheduled professional production.
Shop Baby Brick Filters →10–14 g flower capacity
6–30 g concentrate capacity
Higher-throughput commercial processing while maintaining quality and control.
Shop Brick Filters →Capacity is a starting range, not a fixed operating limit. Actual loading depends on material type, density, moisture, preparation method, platen geometry, pressure application, and target result.
03 · Preparation methods
A sewn filter is stood vertically with folded corners, creating a compact cylindrical puck and a controlled radial flow path.
An open-ended sleeve supports the material around its perimeter while minimizing filter material above and below the puck.
A sewn bag is filled horizontally and flattened into a rectangular load suited to the platen footprint.
A flat mesh sheet is folded around the material, allowing the operator to customize the finished dimensions and minimize excess filter material.
A fine flat-folded inner filter is placed inside a stronger sewn outer filter for added blowout protection.
A fine sewn inner bag is nested inside a larger, stronger sewn bag for faster preparation and reinforced seam support.
04 · Select the construction and method
There is no single correct way to prepare starting material. Consider the following tradeoffs when deciding between folded flat filters and sewn filters, and between a single- or double-filter method.
Where Rosin Technologies fits
Rosin Technologies manufactures both flat filters and reinforced sewn filters using dependable, heat-resistant nylon mesh. This gives processors the flexibility to build a method around material behavior, platen dimensions, budget, production pace, and risk tolerance.
How to select the right filter
Frequently asked questions
Use these guidelines as a starting point and validate the method with your material, press, and operating parameters.
25, 90, and 220 micron filters can all work. A smaller micron provides finer filtration and generally allows less contaminant through. The most popular sizes for flower are 90 and 220 micron.
For a double-filter method, place a 25 micron flat-folded or sewn filter inside a 90 or 220 micron outer filter. For a single-filter approach, use one 25 micron flat-folded or sewn filter with carefully controlled pressure.
Although reuse can be physically possible, we do not recommend reusing filters. Heat, pressure, stretching, retained material, and cleaning can reduce consistency and filter strength.
Generally, a smaller micron filter provides finer filtration and a more refined finished product by retaining more particulate.
It can. A lower micron has smaller openings and retains more particulate and potentially more rosin inside the filter, which can reduce finished yield.
A blowout occurs when internal pressure exceeds the strength of the filter, fold, or seam and allows contaminant to mix with the separated rosin. Apply pressure gently so the oil can warm and establish flow before higher force is introduced. For additional insurance, place a folded or sewn 25 micron filter inside a stronger 90 or 220 micron outer filter.
Double bagging is not always necessary when preparation and pressure application are properly controlled, but it adds protection against bag failure—especially with oily or difficult material.
Yes. The dimensions are designed to match Rosin Technologies heat platens, but the filters can be used with other presses. Match the filter dimensions as closely as practical to the platen size and keep the prepared filter slightly undersized so it can be aligned without an edge extending beyond the heated surface.
Complete your extraction setup
