Hardness is one of several key measurements that determine a finishes wear properties and durability. How it works:
Measuring hardness is done on the first day after application, and then each day after that for the duration of one week. This method accurately measures the speed at which the finish cures from Day 1 to its final cure on Day 7.
With the total hardness measurement from Day 7, it can be determined how the finish compares to other products through the same test. In the end, hardness testing determines how well a finish will perform on the floor.