What must be tested and demonstrated for protective clothing used in flame effects?

Protective clothing used for flame effects must be tested and demonstrated for flame retardance to ensure the safety of performers and personnel involved in events that utilize flame effects. Flame retardant materials are specifically designed to resist ignition and slow the spread of fire, which is crucial in environments where flame effects are present. The ability of the clothing to withstand high temperatures and prevent flames from quickly engulfing the material is essential in reducing the risk of burns or injuries during performances.

Colorfastness ensures that colors do not fade or bleed when exposed to various conditions, durability relates to the longevity of the material under normal wear and tear, and water resistance addresses how well the fabric repels water. While these factors may be important for costume design and overall functionality, they do not specifically address the critical safety measure of protecting individuals from the dangers of fire, making flame retardance the most crucial characteristic for protective clothing in these scenarios.