Alumina effect pigment

An alumina effect pigment is a pearlescent pigment based on alumina (aluminium oxide). The most important class of special effect pigments today exists of natural mica platelets coated with thin films of transparent metal oxides like titanium oxide and iron oxide. To expand the range of achievable color effects, further special effect pigments wer...
Found on http://en.wikipedia.org/wiki/Alumina_effect_pigment
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