Why can some hand-made semi-strengthened glasses pass the Chinese National Standard (CNS) 13762?
Most semi-strengthened glasses cannot pass the steel ball impact test under CNS 13762, yet when surface of the glass was coated with a layer of transparent paint or film, purpose of absorbing the steel ball impact can be achieved. Thus, some of them may pass the inspection, yet this is an act of deceit. Although the clients might be deceived, these products cannot last under load from large vehicles on public roads. (Note: The thin layer can be easily washed away with solvent or gasoline prior inspection.
