The Mechanical Scratch Test is used to measure the potential damage to a coating from scratching and cutting by metal utensils.
The coated pan is placed on a revolving turntable.
Then a weighted ball-point-pen tip, affixed to a balance arm, is placed on the coated surface.
The balance arm oscillates from side to side while the turntable is rotating.
The speed and weight are controlled, and the test is run for the same amount of time for all coatings.