Provides for three impact grades, three 'slip' grades and four 'clarity' grades of flexible unsupported film in a thickness range, generally based on the R20 series, up to 500 micrometres. Tolerances on dimensions are specified and property requirements cover impact resistance, water vapour permeability, slip, optical qualities, printability, openability and roll edge misalignment. Position of material on core is also specified. Several of the test methods are given in appendices.