Question

Give reason.
(a) Annealing process is carried out in glass manufacture.
(b) Vinyl plastic is used in preparing safety glass.

Answer 1

Annealing of a glass is a process to slowly cool the hot glass after they have been formed .

It is carried out to relieve residual internal stresses introduced during manufacture.

This is done so that glass becomes tough and when such a glass breaks , it does not fly into pieces as vinyl plastic holds back the broken process of glass