This part of JB/T 4279 specifies the verification content of the one-way paint scraping tester for enameled round wire in detail, including verification items, technical requirements, verification equipment, methods of verification and result processing. Among them, it specifies the moving distance and speed requirements of the paint scraping device of the paint scraping tester, as well as the requirements of the specimen support platform. In addition, it also specifies the technical requirements such as the diameter of the scraping needle and the vertical relationship with the direction of the paint scraping to ensure the accuracy and Reliability of the testing instrument.