This test method describes a procedure for the accelerated soiling of carpets. It can be used to compare the soiling propensity of two or more carpets; or it can be used to soil carpets as a preliminary step in measuring either the ability of a carpet to be cleaned or the efficiency of a cleaning process. This accelerated carpet soiling method has been found to give similar results similar to floor service soiling, but its use is recommended only as a screening method and not as a replacement for floor testing. 2. Principle 2.1 Specimens of carpet are tumbled together with prepared synthetic soil in a laboratory ball mill for a predetermined time.