Glass bead sizes are quoted in mesh (USA and Asia) or microns/millimetres (Europe and technical sheets). Both appear on real purchase orders, so being able to move between them matters – especially for blasting and grinding grades where a one-size mistake changes surface finish completely.
Quick reference table
| Mesh | µm (approx.) | mm (approx.) | Typical use |
| 16-30 | 1180-600 | 1.18-0.60 | Thermoplastic drop-on / coarse grinding |
| 18-40 | 1000-425 | 1.00-0.425 | Road marking, grinding media |
| 20-40 | 850-425 | 0.85-0.425 | Drop-on road marking (typical) |
| 20-30 | 850-600 | 0.85-0.60 | Grinding media |
| 30-80 | 600-180 | 0.60-0.18 | Premix, composites, fine paint |
| 40-70 | 425-212 | 0.425-0.212 | Blasting / finishing |
| 70-140 | 212-106 | 0.212-0.106 | Fine blasting, paint additives |
Why the band matters more than the number
Two batches can both be called “20-40 mesh” yet differ in how much material sits at the coarse vs fine end. Tight particle-size distribution gives steadier retroreflectivity in road markings and more predictable wear in mills. Ask your supplier how the band is screened and whether the batch test is available.
Choosing a size
- Road marking (drop-on): 20-40 or 20-100 mesh depending on paint film and spec.
- Premix/composites: 30-80 mesh is a common choice for even dosing.
- Grinding media: from 0.6 mm to 1.18 mm and up, matched to mill and product.
- Blasting: 40-70 mesh for general finishing, finer for delicate surfaces.
Linghang publishes every grade in both mesh and mm, from 1.18 mm down to fine paint sizes. Browse grinding & blasting beads or all products – tell us your target size in either unit and we will confirm the matching grade.