He raised the weight to 40 inches. Clack. Still intact.At 60 inches, he held his breath. The "Rapid Deformation" required by ASTM D2794 was a brutal test of molecular adhesion. Clack.
If a new batch of paint passes impact testing at 80 in-lbs, but the next batch fails at 20 in-lbs, you have a formulation or mixing issue that needs to be addressed immediately. astm-d2794
Sometimes combined with ASTM D3359 to see if the deformed coating can be easily pulled away. Why Reproducibility is a Challenge He raised the weight to 40 inches
The weight strikes the uncoated back side of the panel, causing the coating on the front to bulge outward. This is generally considered a more severe test as it evaluates the coating's tensile strength and elongation . Evaluating Results The "Rapid Deformation" required by ASTM D2794 was