The ISO 19252 standard specifies a method for measuring the scratch performance of plastic materials. The standard evaluates the resistance of plastic surfaces to external pressure and friction by simulating scratches that may occur during actual use. During the test, scratch is applied to the plastic surface using a standard substance known as Hardness, and the scratch resistance performance is evaluated by observing the depth, width and surface changes of the scratch. This method is suitable for various plastic materials and is widely used in the quality control and performance evaluation of plastic products, especially in the fields of automobiles, home appliances and electronics. It can effectively estimate the durability and Appearance retention of materials in daily use.