| http://www.w3.org/ns/prov#value | - Examples of facestock materials include paper, polyolefins such as polyethylene, polypropylene, polybutylene, etc., copolymers and combinations thereof such as a copolymer of polyethylene and polypropylene, blends of polyethylene and polypropylene, and high density, medium density, low density and very low density forms thereof; polycarbonate; polystyrenes; polyesters such as polyethylene terephth
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