Abrasion (mechanical)

The artist used different sizes and shapes of abrasives, or turned them in various ways as they rubbed, to create effects on the softer stone's surface.

The Archard equation is a simple model used to describe sliding wear and is based on the theory of asperity contact.

The resistance of materials and structures to abrasion can be measured by a variety of test methods.

The machine draws the mechanical arm with attached brush (or sandpaper, sponge, etc.)

The operator sets a pre-programmed number of passes for a repeatable and controlled result.