1. Official Methods and Recommended Practices of American Oil Chemists’ Society;AOCS,1998
2. Standard test method for transparency of plastic sheeting;D1746,2009
3. Standard test method for oxygen gas transmission rate through plastic film and sheeting using a coulometric sensor;ASTM D3985,2002
4. Standard test method for tensile properties of thin plastic sheeting;ASTM D882,2009
5. Standard practice for maintaining constant relative humidity by means of aqueous solutions;ASTM E104,2007