The water vapour transmission
rate of the films were 50–70, 1.2, 0.9 and 2.2 g transmitted
through 100 square inch when measured for 24 h at 22.7 8C and
100% RH for microporous (SM570Y), low density polyethylene
(PE-LD), polyolefin (PD961) and anti-fog (RD45) films, respectively.