| 摘要 |
The object of the invention is a glass sheet with a maximum thickness of 2 mm, having a surface zone under compression and a central zone under tension, such that the depth at which the transition between compression and tension occurs is at least 100 micrometres, the ratio between said depth and said thickness being at least 0.1, said sheet additionally being such that the flexural strength in a "ring-on-tripod" test is at least 70 MPa, after Vickers indentation under a load of 60 N. |
