Glass is a remarkably versatile material that finds applications across many industries due to its desirable properties such as transparency, durability and corrosion resistance. However, in its annealed or untreated state, glass can be susceptible to damage from thermal or mechanical stresses. Heat treatment processes leverage the amorphous structure of glass to enhance its physical characteristics through controlled thermal conditioning.

Types of Heat Treatment

There are three main types of heat treatment employed on glass to modify its internal stress state and improve mechanical strength:

Tempering

Tempering, also called thermal tempering or heat strengthening, subjects glass to precisely controlled heating and rapid cooling. The Heat Treated Glass is heated to its softening point, then quickly cooled by blasting air onto the surface. This introduces compressive stresses in the surface and balancing tensile stresses within. The result is around 4 times greater strength and increased resistance to impact and thermal stresses compared to untreated glass. Tempered glass spontaneously fractures into small granular pieces rather than large shards if broken, improving safety.

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