Question:
The process of slow cooling of glass to relieve internal stress is called
The process of slow cooling of glass to relieve internal stress is called
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Annealing is the controlled slow cooling of glass to remove internal stresses.
Updated On: May 7, 2026
- Annealing
- Tempering
- Quenching
- Sintering
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The Correct Option is A
Solution and Explanation
Glass articles develop internal stresses during manufacturing.
These stresses occur because different parts of glass cool at different rates.
If these internal stresses are not removed, the glass article may crack or break later.
To remove internal stresses, glass is heated to a suitable temperature and then cooled slowly.
This controlled slow cooling process is called:
\[
\text{Annealing}.
\]
Annealing improves the stability and durability of glass articles.
Tempering is a strengthening process involving controlled heating and rapid cooling.
Quenching means rapid cooling.
Sintering is a process of bonding particles by heating below melting point, mainly used for powders and ceramics.
Therefore, slow cooling of glass to relieve internal stress is:
\[
\text{Annealing}.
\]
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