| http://www.w3.org/ns/prov#value | - A substrate having a baked fluoropolymer release coating thereon, said coating containing magnetizable flakes, a portion of said flakes being oriented in the plane of said substrate and a portion of said flakes being magnetically reoriented to form a pattern in said coating which is observable in reflected light, said flakes having a longest dimension which is greater than the thickness of said co
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