## Q&A.
1. What is the purpose of tempering glass?
2. How is glass tempered?
## Answer.
1. The purpose of tempering glass is to increase its strength and safety. Tempered glass is designed to break into small, dull pieces when shattered, reducing the risk of injury from sharp shards. .
2. Glass tempering is a process that involves heating the glass to a high temperature and then rapidly cooling it. This creates internal stresses in the glass, which increases its strength and makes it resistant to breakage. The rapid cooling process, known as quenching, forces the outer surfaces of the glass to cool more quickly than the center, creating compression on the surface and tension in the center. This balanced internal stress distribution is what causes tempered glass to shatter into small, harmless pieces when broken.
To temper glass, the raw glass is first cut to the desired size and shape. It is then subjected to a heating process in a tempering furnace, where it is heated to a temperature of around 620 degrees Celsius. Once the glass reaches this temperature, it is quickly cooled using a high-pressure air system. This rapid cooling causes the surface of the glass to contract and harden, while the interior remains in tension, resulting in the increased strength and safety characteristics of tempered glass.
Overall, tempering glass is essential for applications where safety and durability are paramount, such as in automotive windshields, shower doors, and glass facades on buildings. By undergoing the tempering process, glass can meet stringent safety standards and provide peace of mind for consumers and users.
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