Figure 1. Diagrammatic drawing showing the brushing apparatus.
The Brushing apparatus consists of: ( A) a gear box to reduce the speed of the motor to 2 cycle/second with a crankshaft and connecting rod attached to a slider in order to change the rotation movement into linear movement to provide a standardized 5 mm horizontal movement; ( B) a brush holder; ( C) double-pane balance; ( D) samples holding pane; and ( E) weight holding pane.