A 25-micrometer-thick plastic film has a moisture permeability that is 840 mg/100 square in./24 hours. What is the likely permeability if we go to a 12.5 micrometer film of the same material?
a) 420 mg/100 square in./24 hours
b) 1680 mg/100 square in./24 hours
c) 210 mg/100 square in./24 hours
d) 168 mg/100 square in./24 hours
