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COPPERLINE MASKS Positioned to Meet New Mask Guidelines PRWeb FacebookTwitterEmail COLUMBUS, Ohio (PRWEB) March 01, 2021 ASTM International, an organization that develops and publishes voluntary standards for a wide range of products, has released the first ever set of standards for masks. The Standard Specification for Barrier Face Coverings established requirements for design, performance, labeling, user instruction, reporting and classification. Manufacturers that test their masks in accredi...