1. standard quality for safety rule of using tempered glass
|
Regions |
USA |
Euro |
UK |
China |
|
Names |
SGCC |
CE |
BS |
3C |
|
Standards |
ansi z97.1 |
en 12150 |
en 12150 |
GB |
2. differences between tempered glass & annealed glass
|
|
Tempered Glass |
Annealed Glass |
| 1. bending strength |
3-5 times |
|
|
2. impact resistance strength |
2-5 times |
|
|
3. thermal stability |
3 times |
|
|
4. safety |
honey-comb broken pieces |
sharp broken pieces |
| 5. cut |
can not be cutted |
can be cutted |
3. Cost --- tempered glass's is about 1 time higher than annealed glass.
4. Check tempered glass (A). Usually, there is a mark on the corner of tempered glass, such as 3C(china), CE (B). Watch the glass through an eyeglass, if you can see alternate black and white spots, the glass is tempered glass. 5. Cut into pieces and process edges (A). Tempered glass can not be cutted and the edges also can not be polished. (B). Tempered glass are cutted into figured sizes, polishing edges and drilling holes before heat-treating. When it is tempered glass, we can not do any process of it.