Mesh Count
65
Openings per linear inch
Sifting Solutions
65 mesh corresponds to a nominal opening of 230 microns (0.230 mm). In botanical screening, this is generally treated as a fine separation step for dry sift, pollen, and powder handling lines.
Mesh Count
65
Openings per linear inch
Opening
230 microns
0.230 mm
Opening Inch
0.00906
Nominal clear opening
Open Area
34.7%
Wire diameter 0.161 mm
| Mesh count | 65 |
|---|---|
| Nominal opening (micron) | 230 microns |
| Nominal opening (millimeter) | 0.230 mm |
| Nominal opening (inch) | 0.00906 in |
| Nominal wire diameter | 0.161 mm |
| Nominal open area | 34.7% |
A 65 mesh screen is built with 65 openings per linear inch. For this reference, the clear opening is listed at 230 microns, with a nominal wire diameter of 0.161 mm and an open area near 34.7%. These values are used for engineering comparison, not as a substitute for final supplier drawings.
At 230 microns, this screen size tends to tighten the cut point so finer resin-rich fractions can be graded with less oversized carryover. In production terms, it sits in the fine part of the screening range and is usually selected after operators define the target fraction, feed dryness, and deck loading rate.
These formulas explain the unit relationship shown in the table.
Micron from mm
micron = mm x 1000
0.230 mm x 1000 = 230 microns
mm from micron
mm = micron / 1000
230 / 1000 = 0.230 mm
Inch conversion
inch = micron / 25400
230 / 25400 = 0.00906 in
Process notes are assembled directly from the selected opening value so each page stays consistent with the table above.
When a 65 mesh screen is used for pollen collection, the nominal opening is 230 microns. This range is often selected when operators want a cleaner pass while still keeping a usable collection rate.
For dry sift separation, 65 mesh gives a nominal clear opening of 230 microns. This range suits balanced production lines that need separation accuracy without sacrificing deck productivity.
In powder grading work, 65 mesh is roughly equivalent to 230 microns. This opening fits controlled grading steps where mid-size powder fractions need to be standardized before packaging or blending.
For botanical pre-screening, a 65 mesh cloth opens at about 230 microns. The screen can still be used as a controlled pre-screen when the incoming material already has a reasonably narrow particle spread.
60 mesh at 250 microns will pass a coarser cut and hold higher throughput. 70 mesh at 212 microns will shift the cut point finer and tighten material control.
Nominal opening values were curated from commonly referenced industrial wire cloth and U.S. sieve conversion charts. Actual clear opening can vary by weave style, wire diameter, and manufacturing tolerance.
Nominal opening values may vary slightly by weave and wire diameter. For purchase approval, always confirm the actual cloth specification issued by the manufacturer.