Color Changes in Polyethylene
Pinking, yellowing, discoloring, and gas fading are different names that describe color changes in polyethylene. These color changes are generally associated with the over-oxidation of the phenolic antioxidant that is added to the resin to protect and stabilize it during processing and use. The condition is strictly cosmetic and does not adversely affect the physical properties of the material. To reverse and remove the pinking condition, expose the material to U.V. for approximately 40 minutes. See Pinking Bulletinopens PDF file for details and prevention instructions.
King StarBoard® AS is wrapped in a reusable plastic sheet during storage. The plastic wrap will be on skids containing light colors or a mix of light and dark colors and is not necessary on skids only containing Black or Charcoal Gray sheets. Please maintain the plastic wrap while the King StarBoard® AS sheets are in inventory as added protection and, whenever possible, the plastic wrap should be shipped to the end-user, too. The skids will be identified with a blue end label as shown below. As a further precaution, we advise storing King StarBoard® AS in well-ventilated areas of warehouses and not in areas where exhaust from fossil fuel-fired equipment can accumulate.
