Mesh Count
140
Openings per linear inch
Sifting Solutions
140 mesh corresponds to a nominal opening of 106 microns (0.106 mm). In botanical screening, this is generally treated as a fine separation step for dry sift, pollen, and powder handling lines.
Mesh Count
140
Openings per linear inch
Opening
106 microns
0.106 mm
Opening Inch
0.00417
Nominal clear opening
Open Area
34.1%
Wire diameter 0.075 mm
| Mesh count | 140 |
|---|---|
| Nominal opening (micron) | 106 microns |
| Nominal opening (millimeter) | 0.106 mm |
| Nominal opening (inch) | 0.00417 in |
| Nominal wire diameter | 0.075 mm |
| Nominal open area | 34.1% |
A 140 mesh screen is built with 140 openings per linear inch. For this reference, the clear opening is listed at 106 microns, with a nominal wire diameter of 0.075 mm and an open area near 34.1%. These values are used for engineering comparison, not as a substitute for final supplier drawings.
At 106 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
0.106 mm x 1000 = 106 microns
mm from micron
mm = micron / 1000
106 / 1000 = 0.106 mm
Inch conversion
inch = micron / 25400
106 / 25400 = 0.00417 in
Process notes are assembled directly from the selected opening value so each page stays consistent with the table above.
When a 140 mesh screen is used for pollen collection, the nominal opening is 106 microns. This range is typically reserved for selective finishing passes where very fine particulate control is required.
For dry sift separation, 140 mesh gives a nominal clear opening of 106 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, 140 mesh is roughly equivalent to 106 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 140 mesh cloth opens at about 106 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.
130 mesh at 115 microns will pass a coarser cut and hold higher throughput. 150 mesh at 100 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.