Dental materials for preparation mcqs

Q.  Age hardening is a process done at______________?

a. Heating up to 200 – 450°C for 15 – 30 min and quenching in water
b. Heating at 700°C for 10 – 15 min and quenching in water
c. Heating at 700°C for 1 hour and quenching in water
d. Heating above 700°C for 30 min and quenching in water


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