Parafilm M^® Laboratory Barrier Film

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• Oxygen (ASTM 1927-98): 150 cc/m² d at 23°C and 50% RH
• Carbon Dioxide (Modulated IR Method): 1200 cc/m² d at 23°C and 0% RH
• Water Vapor:
  
  Flat: 1 g/m² d at 38°C and 90% RH
  Creased: same as flat
• Note: Because of low water permeability and the insensitivity of this material to moisture vapor, it is unlikely that differences in relative humidity (RH) will make a difference in the oxygen permeability.

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