| http://www.w3.org/ns/prov#value | - strate, for example glass, the acrylic resins, polyester, polyurethane, polyethylene terephthalate, the ceramics or the aluminas, wherein the said substrate may or may not be covered with metallic substances, such as aluminum, gold, silver, platinum, copper, bronze, or metal oxides such as titanium dioxide, iron oxide, chromium oxide and mixtures thereof.The nacreous pigments may be chosen from am
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