Test Principle
Under the specified conditions, the sample is placed at an angle of 45°, the sample is ignited for 1 s, and the time required for the sample to burn upward by a certain distance is used as a measure for assessing the degree of burning of the textile. Fabrics with surface piles, the ignition or melting of the base fabric as an additional indicator of the severity of the combustion, but need to be noted.