The criteria we use to determine paint adhesion are primarily the amount of topcoat or plating that is adhered by the tape and the percentage of the hundred grams. There are five levels:

1. ISO grade: 5 = ASTM grade: 0B, which means that the peeling area of the paint is greater than 65%.

2, ISO grade: 4 = ASTM grade: 1B, some squares or all of the flakes, the peeling area is greater than 35% -65%.

3, ISO grade: 3 = ASTM grade: 2B, which means that there is partial peeling along the edge of the slit or large area paint peeling off, and even some of the lattice part is peeled off by the whole piece, the area is more than 15% -35%.

4, ISO grade: 2 = ASTM grade: 3B, representing the edge of the cut and the intersection is more than 5% - 15%.

5, ISO rating: 1 = ASTM grade: 4B, which means that there is a small piece of paint peeling off at the intersection of the incisions, the actual damage in the cross-cut area is less than or equal to 5%.

6, ISO grade: 0 = ASTM grade: 5B, which means that the edge of the lattice does not have any peeling, the edge of the slit is completely smooth. This is the highest level of adhesion.