588Dental MaterialsMedium
Heat hardening is the process done at________?
AHeating at 750°C and then quenching to room temperature
BHeating upto 250°C for 15 to 30 min
CHeating quickly upto 450°C followed by sudden quenching
DHeating 750°C and slowly cooling to zero degree
Correct answer
B. Heating upto 250°C for 15 to 30 min
Explanation
The correct answer is Heating upto 250°C for 15 to 30 min.