Table 1. Profile Height Roughness Parameters of the Birchwood Cross-Section after Sanding Treatmenta.
| without sanding | 120 mesh | 180 mesh | 240 mesh | |
|---|---|---|---|---|
| Ra (μm) | 3.098 | 2.011 | 1.972 | 1.966 |
| Rq (μm) | 4.64 | 2.611 | 2.518 | 2.512 |
| Rp (μm) | 20.894 | 29.91 | 16.418 | 18.586 |
| Rv (μm) | –72.054 | –17.455 | –19.317 | –19.542 |
| Rt (μm) | 92.958 | 47.365 | 35.735 | 38.129 |
a
Definitions: Ra, average roughness; Rq, root-mean-square roughness; Rp, maximum profile height from the mean line within a sampling length; Rv, maximum profile valley from the mean line; Rt, maximum peak-to-valley height within a sampling length.