1.1 ,This classification system provides for the identification of unfilled polyethylene plastics molding and extrusion materials, with a melt index of <,1g/10 min, in such a manner that the supplier and the user agree on the acceptability of different commercial lots or shipments. The tests involved in this specification are intended to provide information for identifying materials in accordance with the groups, classes, and grades covered. It is not the function of this classification system to provide specific engineering data for design purposes.