SP310 rubbing paper (anchor paper) provides a simple way to measure surface roughness. Rubbing paper consists of a layer of hard, incompressible polymer and a layer of foam. After the rubbing paper is placed on the surface to be measured and fully imprinted, the surface roughness is recorded in detail on the rubbing paper.
| Model | Measuring range ( mils / μm ) |
| SP310-CM | 0.5 - 1.0 / 12 -25 |
| SP310-C | 0.8 - 2.5 / 20 - 64 |
| SP310-XC | 1.5 - 4.5 / 38 - 115 |
| SP310-XP | 4.6 - 5.0 / 116 - 127 |