Final answer:
To test the temperature of a hot iron before using it on hair, it is recommended to use a heat-resistant glove or a paper towel. This will help avoid burns and damage.
Step-by-step explanation:
Before placing a hot iron in the hair, it is important to test for temperature to avoid burns and damage. The safest way to test for temperature is by using a heat-resistant glove or a paper towel. This will protect your hand from getting burned and allow you to feel the heat without coming into direct contact with the iron.