Final answer:
A technique of using a heated comb twice on each side of the hair to straighten it is referred to as a hard press.
Step-by-step explanation:
Applying a thermal pressing comb through the hair twice on each side to remove curl is known as a hard press. This technique uses a heated comb to straighten the hair by pressing it against the natural curls, essentially smoothing them out. The process is typically done on dry hair after it has been thoroughly detangled and sectioned. A soft press would involve passing the comb through the hair once, while a hard press requires going through the hair multiple times for a sleeker finish.