CASfire Technical Co.,Ltd have rich experience to provide BSS 7238 Smoke Density test to Aircraft Material. BSS 7238 Smoke Density to Aircraft Material BSS 7238: Fire Test for Smoke Density 2 BSS 7238 Smoke Density to Aircraft Material BSS 7238 Fire test to aircraft material â?? Brief BSS 7238 test the specific optical density of smoke generated by solid materials by NBS chamber. BSS 7238 Smoke Density to Aircraft Material The samples will be dried under temperature 60 in 24 hours, and conditioned in temperature 23 and humidity 50 The following result will be mesured - Ds 1.5 Optical density in 1.5 minute - Ds 4.0 Optical density in 4 minute - Dm 3 Fire test to aircraft material - relative standards