Abstract
This report measured the liquid leakage and gas leakage. Then it compared the liquid leakage to gas leakage. The examination sample used the compressed non-asbestos fiber sheet (V#6500). The experimental gas (Helium) leakage was 1×10^<-8> times or more as large as the experimental liquid (water) leakage. But when the experimental water and Helium volume leakage converted mass leakage, these values became near.
