Surface finish sandpaper grit chart
Upmold collected these data for your reference for plastic injection mold quality of surface polishing, how to control or inspect the polishing quality of molds, also you can download it.
- Standard Sandpaper & Whetstone Grit Sizes Range of Belts Correspond Chart
| Standard Whetstone | Standard Sandpaper | ||
| Grit Size | Roughness (µm) | Grit Size | Roughness (µm) |
| F220 | P240 | 58.5±2.2 | |
| F230 | 55.7±3.0 | P280 | 52.2±2.0 |
| F240 | 47.5±3.0 | P320 | 46.2±1.5 |
| F280 | 39.9±1.5 | P360 | 40.5±1.5 |
| F300 | P400 | 35.0±1.5 | |
| F320 | 32.8±1.5 | P500 | 30.2±1.5 |
| F360 | 26.7±1.5 | P600 | 25.8±1.0 |
| F400 | 21.4±1 | P800 | 21.8±1.0 |
| F500 | 17.3±1 | P1000 | 18.3±1.0 |
| F600 | 137.±1 | P1200 | 15.3±1.0 |
| F800 | 11.0±1 | P1500 | 12.6±1.0 |
| F1000 | 9.1±1 | P2000 | 10.3±0.8 |
| F1200 | 7.6±0.5 | P2500 | 8.4±0.5 |
