Rz (mean roughness depth)

Rz, or mean roughness depth, is a measurement used to quantify the surface texture of a material. It indicates the average height difference between the highest peaks and lowest valleys over a specific area. Essentially, it provides an idea of how rough or smooth a surface feels or appears. A lower Rz value means the surface is smoother with fewer irregularities, while a higher Rz indicates a rougher surface with more pronounced peaks and valleys. This measurement helps in assessing how a surface might interact with other materials, influencing factors like friction, wear, and appearance.