1.1 ,This test method covers a procedure for determination of the steady-state rate of transmission of oxygen gas through plastics in the form of film, sheeting, laminates, coextrusions, or plastic-coated papers or fabrics. It provides for the determination of (1) oxygen gas transmission rate (O₂GTR), (2) the permeance of the film to oxygen gas (PO₂), and (3) oxygen permeability coefficient (P′,O₂) in the case of homogeneous materials.