Heat Soaked Glass is tempered glass with an additional heating process to reduce the possibility of spontaneous breakage of glass.
Tempered glass can rarely break without provocation due to an impurity called NiS(Nickel Sulphide) in raw float glass. Heat Soaked glass does not break spontaneously and is extremely safe.
HOW DO WE KNOW THE GLASS IS HEAT SOAKED?
It is impossible to know that the glass is Heat Soaked or not by seeing or touching.
Although, YAOHUA Glass provide detailed report(including graphical representation) of each and every Heat Soaked cycle to show that the glass is Heat Soaked.
WHAT IS SPONTANEOUS BREAKAGES?
In various situations fully tempered glass may break for no reason or provocation. Many factors might cause such spontaneous breakages, but the most common are nickel sulphide inclusions. Nickel sulphide inclusion, also known as NiS, occurs during the manufacturing process for float glass. In the glass batch, nickel-rich contaminants such as stainless steel might be present, and then combine with sulphur to form nickel sulphide inclusions. These inclusion cannot be seen or identified in the fully formed glass.