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Flame Resistance Defined

Flame Resistance Defined

Flame resistance is the characteristic of a fabric that causes it to self-extinguish when the source of ignition is removed. The most commonly used test method is ASTM D6413* Standard Test Method for Flame Resistance of Textiles (Vertical Test). The vertical flame test is a test method with no pass/fail requirements. Industry established standards range from 4" to 6" (100 mm to 150 mm) maximum char lengths. It is very important for flame resistant fabrics to self-extinguish. Fabrics that self-extinguish after the source of ignition is removed can dramatically reduce body burn percentage and increase the chance for survival. However, char length measurements by themselves have no correlation to the protection afforded by a flame resistant fabric. True protection to thermal events is better measured by testing the thermal resistance of fabrics against exposures to simulated hazards, such as the flash fire manikin test or the arc thermal performance test - both which we perform on a regular basis.

*Please review ASTM D6413 for a complete description of test procedures.

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