| prov:value
| - Generally, moldable thermoformable materials are used to form light transmissive substrate 12 and include, for example, plastics such as polyethylene terephthalate (PET), especially PET type G, polycarbonate, acrylics such as polyacrylates including polymethyl methacrylate (PMMA), polyacrylonitrile, polyvinyl chloride, polystyrene, cellulose diacetate and cellulose triacetate, polypropylene, polyd
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