| http://www.w3.org/ns/prov#value | - Useful base layer and/or microstructured optical layer materials include glass and various polymeric materials including cellulose acetate butyrate, cellulose acetate propionate, cellulose triacetate, polyether sulfone, polymethyl methacrylate, polyurethane, polyester, polycarbonate, polyvinyl chloride, syndiotactic polystyrene, polyethylene naphthalate, norbornene polymers, copolymers or blends b
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