How to identify tempered glass on the market?

Tempered glass turns into small particles after breaking, while ordinary glass is still knife-shaped. This is the most important way to distinguish tempered glass from ordinary glass.

But in engineering testing, it is undoubtedly unrealistic to use such destructive testing at every turn.

So how do you know if you are buying tempered glass?

This is the most important way to distinguish tempered glass from ordinary glass. But in engineering testing, it is undoubtedly unrealistic to use such destructive testing at every turn.

So how do you know if you are buying tempered glass?

This has to be analyzed from the principle of tempered glass manufacturing, tempered glass is the ordinary annealed glass first cut to the required size, then heated to a close softening point, and then quickly and evenly cooled. After tempering, the surface of the glass forms a uniform pressure, and the internal tension is formed, so that the performance of the glass can be greatly improved, the tensile strength is more than 3 times that of ordinary glass, and the impact resistance is more than 5 times that of ordinary glass.

It is also this characteristic that the tension characteristic has become an important sign to distinguish between real and fake tempered glass, that is, the tempered glass can see color stripes on the edge of the glass through the polarized light sheet, and the black and white spots can be seen on the surface of the glass. Polarizers can be found in camera lenses or glasses, so it is easier to observe by adjusting the light source when observing.

There will be a 3C logo on the glass, usually in the corner of the glass.

How to distinguish tempered glass

There are three ways to determine whether the glass is tempered:

1.Polarizer identification: Wearing polarized sunglasses to observe the surface of the glass, the tempered glass will show colored stripe spots, while ordinary glass does not. It can also be viewed from the side, and there will be bluish spots on the tempered glass.

2.Look at the mark to check the certificate: most of the building tempered, laminated glass manufacturers have passed the product certification, must be silk-screened or pasted on the product CCC mark or in the outer packaging and accompanying documents to add the CCC mark.

3.Feel the surface to find the curvature: the surface of tempered glass will have a concave and convex feeling, while ordinary glass will be flat. Observe the longer edges, the bow curvature should not be exceeded, and the waveform curvature should not be exceeded. Put two larger pieces of tempered glass next to each other, and the curvature is more obvious.

The advantage of tempered glass is that the tensile strength is more than 3 times that of ordinary glass, and the impact resistance is more than 5 times that of ordinary glass. Tempered glass is characterized by the fact that color stripes can be seen on the edge of the glass through polarizers, while black and white spots can be seen on the surface layer. Pay attention to the adjustment of the skin of the light source socks when observing.

Look with polarized sunglasses: you can see that the tempered glass has colored markings, while the ordinary glass can't see it. Scratch with a sharp object:

Ordinary glass is easy to scratch, and tempered glass is difficult to scratch. Look at the fragments when you fall: the tempered glass fragments are granular and have no edges and corners; Ordinary glass has glass-like sharp corners.

Look at the surface flatness: the surface of tempered glass will be uneven, and ordinary glass is relatively flat and smooth. <

It can be identified by:

1. Look with polarized sunglasses. You can see that tempered glass has colored markings, while ordinary glass can't see it.

2. Scratch with a sharp object. Scratch hard, ordinary glass is easy to scratch, tempered glass is difficult to scratch.

3. Fall to see the debris. Tempered glass shards are granular and have no edges and corners; Ordinary glass has glass-like sharp corners.

4. Look at the surface flatness. The surface of tempered glass will be uneven, and ordinary glass is relatively flat and smooth.

1. Look at the glass logo, see if there is a tempered 3C logo at the corner of the glass, and the kind that can not be scraped off with a 3C mark is basically tempered glass.

The processing procedure of tempered glass is to first cut the ordinary float glass to the required size, and then grind, clean, and mark the national compulsory certification CCC mark with ink.

The ink generally cannot be scraped off after passing through high temperatures. If the 3C mark on the glass can be wiped off by hand, it can basically be concluded that it is fake tempered glass.

2. Look at whether the glass is slightly deformed from the side, because after the glass is fired at high temperature, there will be slight deformation, which can only be seen from the side of the glass, and the front is generally not easy to see.

3. Look at the fragments of glass, after ordinary glass is broken, it is large and has sharp corners, which is easy to hurt people. Tempered glass is granular after it is broken, and the corners are very blunt, which is not easy to hurt.

1. Generally speaking, there will be relevant signs. There will be a 3C mark on the certificate, and the outer packaging will be certified by the enterprise, and the relevant information can be queried, as well as the factory number, expiration date, etc., so as to judge whether it is tempered glass.

2. You can see the surface of the glass by wearing polarized sunglasses. What is presented is a colored striped diamond, which is tempered glass. If not, it is not authentic tempered glass, you can also look at the side in the sunlight, and there are blue spots on the glass, which is tempered glass.

3. Judge by flatness. Tempered glass is worse than ordinary glass, we can directly touch its surface with our hands, there is a feeling of unevenness, and the longer edge has a certain curvature. The first hand is blind.