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How Glass Is Tempered or Toughened?

In the toughening process, the surfaces of the glass are heated in a furnace.at or over 620°C, depending on type of glass and thickness, it could be as high as 700°C,. The hot glass is then cooled rapidly by a blast of air over a period of between 3 and 10 seconds. As a result, the surfaces shrink, and (at first) tensile stresses develop on both sides of glass the surfaces.
Heating the glass
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Tempered glass
Toughened glass

Heating Glass-Step 1

In the toughening process, the surfaces of the glass are heated in a furnace.at or over 620°C, depending on type of glass and thickness, it could be as high as 700°C,.

Cooling Glass Rapidly-Step 2

The hot glass is then cooled rapidly by a blast of air over a period of between 3 and 10 seconds. As a result, the surfaces shrink, and (at first) tensile stresses develop on both sides of glass the surfaces.

cooling heated glass with cold air blast
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mirror auckland
tempered glass
toughened glass

Washing Glass and Drying-Step 3

After washing and drying, the tempered/toughened glass is made. Unlike toughened glass, when annealed glass breaks, it shatters into sharp, large, and hazardous shards. On the other hand, toughened glass shatters into small, harmless pieces that reduce the risk of injury. The toughened glass has the same look as the annealed glass, but its strengthen is 4 to 5 times higher than its counterpart of annealed glass at the same thickness.

Broken toughened glass image
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How tempered glass is made

We Sell Toughened Glass and Install Toughened Glass For You

For glass and mirror service, gym mirror or large mirror installation, window repair, shower, splashback installation, sliding door installation and sliding door repairs in Auckland, please call glass and mirror experts at 09-5079060, email us:[email protected]

For glass and mirror service, gym mirror, dance mirror or large mirror installation, window repair, shower, splashback installation, sliding door installation and sliding door repairs in Auckland, please call glass and mirror experts at 09-5079060, email us:[email protected]

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