| http://www.w3.org/ns/prov#value | - In the case of retardation layer in the form of a stretched polymeric foil such as a polycarbonate foil, the thickness is typicaly 10 to 100 ??m, whereas a wet deposited retardation layer has a typical thickness of 0.05 to 10 ??m, or in particular 0.1 ??m to 5.0 ??m, or more particular 0.2 to 1.0 ??m.
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