Many people in polishing will ask, I now the surface should be sandpaper, or to take what number of diamond compound to deal with, and then with cowhide or wool wheels, has always been in the polishing industry has been a fuzzy area without a standard, and often can only rely on the experience of masters and then give advice, and then test, if you try the right counts as good luck, and try the wrong again and again and again, because of this, we believe that this issue is more necessary to have a clear value, so the issue of making the definition of the scientific and explanation of the selection, and the choice.
| Mesh/Particle Size um | Ra /um |
| #120/100um | 0.8~1.0 |
| #200/55um | 0.4~0.5 |
| #400/45um | 0.15~0.3 |
| #600/35um | 0.1~0.2 |
| #800/25um | 0.05~0.08 |
| #1000/17.5um | 0.045~0.06 |
| #1200/15um | 0.04~0.055 |
| #1500/13um | 0.035~0.045 |
| #1800/9um | 0.03~0.04 |
| #2000/8um | 0.025~0.03 |
| #3000/6um | 0.02~0.025 |
| #5000/4.5um | 0.018~0.023 |
| #8000/3um | 0.015~0.018 |
| #14000/1um | 0.009~0.013 |
| #28000/0.5um | 0.004~0.008 |
| #60000/0.25um | 0.002~0.003 |
| #150000/0.1um | 0.0015~0.002 |
| #300000/0.05um | 0.001~0.0013 |
| #500000/0.03um | 0.0007~0.001 |
| #1500000/0.01um | <0.0006 |
| #5000000/0.003um | <0.0003 |
