Mesh Count
100
Openings per linear inch
Sifting Solutions
100 mesh corresponds to a nominal opening of 150 microns (0.150 mm). In botanical screening, this is generally treated as a fine separation step for dry sift, pollen, and powder handling lines.
Mesh Count
100
Openings per linear inch
Opening
150 microns
0.150 mm
Opening Inch
0.00591
Nominal clear opening
Open Area
34.9%
Wire diameter 0.104 mm
| Mesh count | 100 |
|---|---|
| Nominal opening (micron) | 150 microns |
| Nominal opening (millimeter) | 0.150 mm |
| Nominal opening (inch) | 0.00591 in |
| Nominal wire diameter | 0.104 mm |
| Nominal open area | 34.9% |
A 100 mesh screen is built with 100 openings per linear inch. For this reference, the clear opening is listed at 150 microns, with a nominal wire diameter of 0.104 mm and an open area near 34.9%. These values are used for engineering comparison, not as a substitute for final supplier drawings.
At 150 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
0.150 mm x 1000 = 150 microns
mm from micron
mm = micron / 1000
150 / 1000 = 0.150 mm
Inch conversion
inch = micron / 25400
150 / 25400 = 0.00591 in
Process notes are assembled directly from the selected opening value so each page stays consistent with the table above.
When a 100 mesh screen is used for pollen collection, the nominal opening is 150 microns. This range is often selected when operators want a cleaner pass while still keeping a usable collection rate.
For dry sift separation, 100 mesh gives a nominal clear opening of 150 microns. At this point the screen is acting as a fine classification layer, so feed consistency and blinding control become more important.
In powder grading work, 100 mesh is roughly equivalent to 150 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 100 mesh cloth opens at about 150 microns. At this fineness the screen is no longer a rough pre-screen. It becomes a precision control point inside a multi-stage grading workflow.
90 mesh at 165 microns will pass a coarser cut and hold higher throughput. 110 mesh at 135 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.