The most popular test for measuring gas transmission rates is described in ASTM D3985 “Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using Coulometric Sensor.”
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Contract Pharmacal Corporation (CPC) develops, manufacturers, and packages over-the-counter drugs and dietary supplements for prominent brand owners such as Bayer and GlaxoSmithKline, and retailers such as Walgreens and CVS.