1. Viewing fragments: You can check whether the corner waste materials cut by the merchant have become small blunt angle particles after being crushed, and judge whether they are qualified based on this. When the tempered glass of the Taige is broken, the number of fragments in the 50mm * 50mm area must exceed 40, and a small amount of elongated fragments are allowed. The glass slag cannot be in the shape of a blade, and the direction of the elongated fragments should be roughly parallel to the edge of the glass. If they are not parallel, the angle should not exceed 45 degrees. If there is one item that does not meet the standard, it is a non grid product.

2. Observing stress spots: Under certain special natural light (or polarized light) conditions, by observing the reflected light of tempered glass, it can be seen that there are alternating bright and dark stripes on the surface of the glass. These stripes with inconsistent brightness are called stress spots. At present, the most advanced technology internationally cannot completely eliminate stress spots, but it can alleviate them. The lighter the stress spot, the better the quality.

3. Check the flatness: Tempered glass has slightly lower flatness than annealed glass, and the one with better flatness should be selected through comparison.

4. Check if it has been homogenized: Self drying is an inherent characteristic of tempered glass and is difficult to avoid. But if homogenized, over 90% of self explosion hazards can be eliminated. When selecting, be sure to refer to the product manual to determine if it has undergone homogenization treatment.

5. Check if there is a 3C certification mark on the glass. Tempering equipment factories are all qualified and will print the 3C logo on the processed glass. According to regulations, the 3C mark must be affixed to safety glass.