This standard specifies a method for the measurement of the hardness of materials for pavement marking using a type A hardness gauge for thermal plasticity under high temperature conditions. The Hardness value of the material is determined by applying pressure to the material at a specific temperature by a specific indenter. This method is suitable for controlling the mass of materials, especially pavement marking materials used in high temperature environments. The test results are able to help evaluate the heat resistance of the material, but are not directly related to the basic properties of the material. The standard emphasizes maintaining the conformity of the tested Environmental temperature to ensure the accuracy and Reliability of the test.