Toughened glass, also referred to as tempered glass is physically and thermally stronger than normal glass. The prime function of any toughened glass is to ensure if broken for whatever reason then it breaks safely.
How Is it Made?
Tempered glass is produced by the glass being passed through an oscillating furnace at high temperatures (about 630 C) and then rapidly cooled. This procedure modifies the structure of the glass, generating a highly compressed stress surface. If the glass is shattered, the tension stored within it is released, causing the glass to break down into tiny harmless particles with blunt edges.
Benefits of Toughened Glass
- It is much stronger than regular glass making it more durable and suitable for most uses
- Able to withstand much a constant temperature of up to 250 degrees celsius
- Greatly reduces the risk of injury if someone needed to break a window during an emergency (eg. during a fire break in) as it shatters into pea-sized pebbles
Disadvantages of Toughened Glass
- It is more difficult to break in an emergency scenario
- Due to the manufacturing process, complicated designs and shapes may not be possible
- Cannot be cut after manufacturing, so modifications like installing a pet door may not be possible
- Because it has a minimum thickness of 4mm, it is unsuitable for many applications.
How to Identify Toughened Glasss
There are a number of ways to determine whether your glass has been toughened –