L-P-396B, FEDERAL SPECIFICATION: PLASTIC MOLDING AND EXTRUSION MATERIAL, POLYSTYRENE (01-AUG-1969) [S/S BY ASTM-D4549]

L-P-396B, FEDERAL SPECIFICATION: PLASTIC MOLDING AND EXTRUSION MATERIAL, POLYSTYRENE (01-AUG-1969) [S/S BY ASTM-D4549]., This specification covers the requirements for polystyrene materials suitable for molding and extrusion.