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The glass sheets undergo a tempering process. This is where it passes through an oven or a heating machine for tempering. This process can be done in batches or even in one continuous motion. Further, the glass then goes through a process called “quenching”. Here glass is cooled down. This process lasts for barely any second. So, various nozzles are used to blast high air pressure on the glass surface. As the middle of the glass cools down first, so this side of the glass contracts, whereas the outer surface compresses. This change allows the glass to become strong. This method is time taking but super effective.
Tempered glass has smooth edges
Tempered glass is tougher because of the intense heating and a gradual cooling process to make it sturdier. A tempered glass needs to be sandblasted. So, one good way is to look thoroughly at the edges of the glass. Tempered sheets have smooth and even edges because of the extra processing it goes through. On the other hand, if the glass is not tempered, the edges feel rough to touch. So, the best way to feel is to run your fingers over the edges. The smoothness of the feeling ensures that the glass is tempered.
Imperfections are visible on the surface of the glass
Further, look for the small defects, if any. If you identify any distortions, slight bending on the glass, then most likely it is tempered glass. These imperfections are a result of the intense heating procedure. When glass gets tempered, it becomes mendable when it is super-hot, so when it is lifted using the tongs, the process leaves slight imperfections. Look closely and you will see by yourself.
Tempered glass tends to break on drilling
Glass does not get holes drilled into it. Most kinds of drilling cause the glass sheets to break. Thus, cutting a hole and any shaping could be done only before tempering.
Stamp identifier for authentic tempered glass
Every tempered glass sheet has a stamp used as an identifier for tempered glass. This stamp shows the manufacturer name and the CPSC standards, the stamp is a symbol to prove whether the glass is tempered or not.
If you buy the glass directly from the manufacturer you can check the logo carved on the glass sheet without difficulty. Having a carved sign on a glass sheet is proof that you are most likely to deal with tempered glass. If cannot find the craved stamp or sign, you might have an ordinary annealed glass instead.
Tempered glass is a safety glass
Tempered and regular glass break in different ways. When a tempered sheet breaks, the glass does not spread all over its surroundings. It breaks into small and relatively harmless pieces. This type of glass is used in areas where human safety is a top priority. Regular glass is much more fragile and breaks into big uneven pieces that are extremely dangerous. Consequently, this glass is used in multiple appliances and is known as “safety glass”.
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