This standard establishes unified technical specifications for critical consumables used in coated paper production lines, comprehensively defining the product classification system, core performance requirements, and stringent factory inspection rules. The document emphasizes the control of the microscopic quality of the doctor blade edge, covering key parameters such as edge straightness, roughness, hardness, and wear resistance, ensuring its ability to precisely control coating thickness and uniformity during high-speed coating processes. In the testing phase, it is essential to use a laser interferometer or white-light interferometer to accurately measure the geometric profile and straightness of the edge, assess the deformation resistance of the material matrix with a microhardness tester, and observe microscopic defects at the edge using a scanning electron microscope. Additionally, employing a spectrometer for material composition analysis and utilizing a friction and wear testing machine to simulate working conditions and verify its service life are crucial measures to ensure product quality.