Attractive dinnerware provides superior strength and rigidity. Thick clay-coated paper delivers excellent soak and leak resistance. Resistant to heat and freezing temperatures. Mediumweight - Deep Well. ProPlanet™ Seal—This product earns Dart's ProPlanet™ Seal because it meets ASTM requirements for commercial compostability. Dinnerware Type: Plate; Material Type: Paper; Material(s): Clay-Coated Paper; Shape: Round.