What are the differences between tempered glass and ordinary glass?

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In Daily life, tempered glass and ordinary glass are widely used, but there is a big difference between these two kinds of glass: the safety, strength and temperature difference resistance of ordinary glass are not as good as tempered glass. When purchasing, we can tell that two kinds of glass by using polariscope for identification, checking the certificates and signs, and feeling the unevenness of the surface to distinguish that two kinds of glasses.

 

 

 

The differences between tempered glass and tempered glass

 

1. Safety

 

Ordinary glass: Generally, the broken ordinary glass has sharp edges, which can cut your fingers if you are not careful.

 

Tempered glass: after the tempered glass is broken, the fragments are uniform and small particles, and there will be no sharp fragments, so even the broken tempered glass is very safe.

 

2. Strength

 

There is uniform compressive stress on the surface of tempered glass, and there is tensile stress inside the glass. There two forces make tempered glass have higher tensile and impact resistance than ordinary glass. However, tempered glass also has a certain 3‰ self-explosion rate due to the existence of these two forces.

 

3. resistance to temperature difference

 

The temperature difference resistance of ordinary glass is average, and the temperature difference should not exceed 70℃, otherwise the ordinary glass will break due to rapid thermal expansion and contraction.

 

Tempered glass is more resistant to temperature differences, and can generally reach above 135℃. Generally, there will be no problem with heating or putting it in the refrigerator, and tempered glass can be used safely.

 

 

 

How to tell tempered glass and ordinary glass:

 

1. check with polariscope

 

By wearing polarized sunglasses to observe the tempered glass, you will see colored stripes and spots on its surface, while you couldn’t find them on the ordinary glass.

 

2. check the certificates and signs of the glass

 

Tempered glass products sold through official channels will have the CCC mark, and you can check whether those tempered glass products have relevant certificates through their official website, and then pay attention to check if those certificates have expired.

 

3. check the flatness of the surface of the glass

 

The flatness of tempered glass is not that perfect, and it feels concave and convex to touch. If two pieces of tempered glass with a larger area are superimposed and observed, you will find that the edge has a relatively obvious curvature. The surface of ordinary glass is generally flat, with straight edges and no curvature. In fact, compared with ordinary glass, the tempered glass has just one more process-Tempering. After that tempering treatment, the physical strength and temperature resistance of glass are significantly improved, and its safety is also greatly increased. Even if tempered glass is broken, the fragments of tempered glass are also present in small granular form, no risk to hurt people.

 

 

 

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