GB/T 5210-2006 specifies tensile adhesion test methods for Paints, varnishes or related products to assess adhesion between coatings and substrates. This standard is based on the international standard ISO 4624:2002 Paints and varnishes Pull-apart adhesion test and replaces the 1985 version of GB/T 5210. Compared with the previous version, this standard adds provisions for various forms of damage, such as damage strength, damage area size and description of damage properties. At the same time, the standard also adds the method of testing from one side using a single test column, which is suitable for hard substrates. In addition, the test conditions, measurement times and the presentation of results are also specified in detail to ensure the accuracy and Repeatability of the test.