What is the maximum allowable surface temperature in Celsius for exposed skin due to incident radiation from a flame effects display?

• A. 42°C
• B. 44°C
• C. 46°C
• D. 40°C

Answer: (B)

Radiant heat safety for flame effects focuses on preventing burns from the heat that reaches the skin, not just what you touch. Exposed skin can start to burn if the surface temperature from incident radiation is too high, even without contact. To protect performers and nearby personnel, a practical limit is set for the maximum skin surface temperature under incident radiant heat. The value used in standards is 44°C, which provides a safe margin for typical exposure times and varying skin sensitivities. Allowing up to 44°C keeps the risk of burns low, whereas higher temperatures, like 46°C, increase burn risk quickly. While 40°C or 42°C would be safer, they are not the defined maximum threshold used in this guidance. So the maximum allowable surface temperature is 44°C.