| http://www.w3.org/ns/prov#value | - Example 1 is a multilayer optical film constructed of alternating layers of polyethylene naphthalene (PEN) having an intrinsic viscosity (IV) of 0.48 and polyethylene terephthalate (PET) having an IV of 0.6 (IVs measured in a solvent, for example, of 60% phenol and 40% ortho-dichlorol benzene) at 30??? C. Typical refractive indices of PEN after a uniaxial draw (using a tenter or similar process) a
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