The ISO 1520-2006 standard specifies an experimental method for evaluating the resistance of paints, varnishes and coatings of related products to cracking and/or peeling from substrates when undergoing gradual deformation of indentation. The standard provides specific procedures for evaluating the scratch and indentation resistance of coatings under standard conditions. Testing can be in the form of "pass/fail" or by gradually increasing the depth of indentation to determine the minimum crack resistance of coatings. The standard applies to layer-by-layer or monolithic testing of multi-coating systems and provides precise test methods to ensure the Reliability and durability of coatings in practical applications.