L-C-396B, FEDERAL SPECIFICATION: PLASTIC MOLDING AND EXTRUSION MATERIAL, POLYSTYRENE (10 JUN 1975) [S/S BY ASTM-D4549]

L-C-396B, FEDERAL SPECIFICATION: PLASTIC MOLDING AND EXTRUSION MATERIAL, POLYSTYRENE (10 JUN 1975) [S/S BY ASTM-D4549]., This specification covers the requirements for polystyrene materials suitable for molding and extrusion.