... and then cool it down rapidly, thus the glass becomes much stronger and more flexible. It is very hard to break a tempered glass, and ... hope we can have a pleasure cooperationPlease feel free to contact me if you have any questions.We will appreciate if you ... regards.EllaLidu Glass Machine CO.,LTDwebsite:www.liduglass.com 4mm to 19mm(Clear,Tinted,Reflective,Laminated,Tempered,Patterned)Curtain Wall ...