Question

what is annealing of Glass why it is necessary

Answer 1

To relieve stresses, which can lead to breakage at room temperature, it isnecessary to cool glass in a controlled manner through a predetermined temperature gradient. This allows the surface and interior to cool uniformly. This controlled process for coolingglass to relieve interior stresses is called "annealing

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Answer 2

heya,
here is ur answer,
------------------------------------------------------------------------------------------------------To relieve stresses, which can lead to breakage at room temperature, it is necessary to cool glass in a controlled manner through a predetermined temperature gradient. This allows the surface and interior to cool uniformly. This controlled process for cooling glass to relieve interior stresses is called "annealing".so that the glass becomes hard.
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