Not all heat is created equal. Understanding which type of heat you are trying to protect against is going to make all the difference between proper protection and burns.
From the Stanco catalog page 38, we get the following classifications
What kind of heat is it?
It is important to understand the types of heat in order to select the proper gloves and clothing for protection.
Radiant: Generated by a heat source. An example would be a fireplace or the sun. The materials being struck absorb the heat’s rays (it’s hotter standing in the sun than in the shade).
Ambient: The surrounding atmospheric temperature in a particular environment. Example 72 degrees Farenheit in your home; 92 degrees Farenheit on the golf course in July; 1,800 degrees Farenheit in a flaming building.
Conductive: Direct contact with hot surfaces. Example: Touching a hot piece of metal at 800 degrees Farenheit or leaning against a heat treating oven at 1,000 degrees Farenheit.