ASTM D4976, PE244, ASTM D1248. HDPE sheets are high gloss on both sides. General Purpose Extruded HDPE does not have protective liners,
and typically will have extrusion scratching.
HDPE is more rigid and harder than low density materials and is three times better in compressive strength. HDPE complies with FDA
requirements for direct food contact applications. It is also accepted by USDA, NSF and Canadian Department of Agriculture.