The GMM Scotch-Brite Abrasion Test Machine measures a coatings resistance to constant scrubbing with a standard abrasive scouring pad. The vertical load on the scouring pad is set at 10 pounds (4.54 kg), and the scouring pad is changed every 10,000 strokes. GMM technicians document the number of cycles that are required to scrape the coating down to bare metal in order to gauge the abrasion resistance of the non-stick system.
The presence of bare metal on the abraded wear track is detected by GMM technicians by placing chemicals on the pan that react with metal. In this way, even flaws that are not detectable to the naked eye are accounted for. Please watch the first video, which shows the machines in action, and the second video, which shows testing of a wear track.