https://www.avient.com/news/polyone-launches-dual-protection-light-barrier-clear-packaging-chinaplas-2014
Available as a granular masterbatch for injection molding, thermoforming or extrusion, these new additives offer superior performance for most clear polymers, including polyethylene (PE), polypropylene (PP), polycarbonate (PC), polyethylene terephthalate (PET) and polystyrene (PS).