Which test is used to measure the adhesion of paint to a substrate?

The cross-hatch adhesion test is a widely recognized method for assessing the adhesion of paint to various substrates. This test involves making a series of cuts in a crosshatch pattern through the painted surface and then applying adhesive tape over the area. When the tape is pulled away, the amount of paint that remains adhered to the substrate is evaluated. A strong bond will show minimal paint loss, indicating good adhesion, while significant paint removal suggests weak adhesion.

This test is particularly effective because it simulates the conditions that paint might endure in real-world applications. The results provide a clear, quantifiable measure of how well the paint will perform when exposed to various stresses, such as abrasion, moisture, and changes in temperature. Thus, the cross-hatch adhesion test is essential for ensuring that paint systems will adhere properly in practical use, safeguarding against issues like peeling and flaking that can compromise both appearance and protective qualities.