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pearlescent /lustre/nacreous pigments

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pearlescent/lustre/nacreous pigments (In French pigments perlescents/à effet de perle) the most popular group of interference pigments, which offer not only a special shimmer but also in some cases color flop effects; prepared from mica schist by BASF/Ciba, Eckart (Pearlstar, Phoenix), Kremer (50000), Merck (Iriodin, Pearlets); formulae mainly for gravure, flexo and screen printing, but with smaller particles also for sheet-fed offset; pearlescent pigments develop their sheen best on smooth surfaces, especially on matt-coated papers.