Surface Roughness Chart
Surface Roughness
| Category | # | Grit (range) | RA (range) |
| Clean up | 3 | 100-120 | 33-100 |
| Dairy | 4 | 150-180 | 15-32 |
| Looks & Pharmasuiticial | 5 | 220-240 | 8-20 |
| Near Mirror | 6 | 320 | 3-10 |
| Mirror Finished | 8 | 500-800 | RA<3 |
We offer RA testing, this measures the surface roughness or texture of an item, using an instrument that scans the surface of the item and reports the Ra.(roughness average) in micro-inches or micro-meters.
