What is the standard for the impact resistance test of a 64g steel ball dropping from a height of 1.2 meters?

A: The drop ball impact test is a commonly used method to measure the impact resistance of glass. A steel ball of a certain weight is freely dropped from a specified height to impact the film surface, and it is observed whether the film surface breaks. The impact energy of a 64g steel ball dropped from a height of 1.2 meters is approximately 0.75 joules (E=mgh=0.064kg×9.8m/s²×1.2m≈0.75J). This test simulates the impact scenario when a mobile phone drops from pocket height and encounters a sharp object. Woowhead Guanfudun passed the SGS 64g steel ball 1.2m drop ball impact test, and the film surface was not cracked (Report No. SZIN2606001469PL02_CN). The high-alumina glass of Nanshan Glass and the three-step strengthening process are the basis for impact resistance. Note: Passing the drop test does not mean the film will never break - the Angle of impact when the phone drops, the material of the ground, and the point of force application will all affect the result. The film can only reduce the probability of shattering, but cannot completely prevent it.