ISO 22557 "Paints and varnish - Scratch test" is a standard test method for the scratch performance of Paints and varnishes. The standard specifies the specific requirements and procedures for testing with spring-loaded scratch pens. The scratch resistance of the coating surface under different loads is measured by gradually increasing the pressure to evaluate its durability and Mechanical Properties. This method is suitable for various coating systems and can provide a scientific basis for Product Research & Development, quality control and performance comparison.