This standard test method is used for the measurement of the adhesion force of pressure sensitive label paper when disbonding at a 90 ° angle, mainly for mass assurance. The test can evaluate the adhesion strength of label paper on a standard steel substrate or Miscellaneous surface and compare it with acceptance criteria. The method is also suitable for testing the adhesion uniformity of label paper, although changes in raw materials and gluing agents may affect the test results. This method is not suitable for label paper with high tensile strength or hard backing, as this may lead to a high degree of variability in test results.