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Ultramarine Blue Powder Ultramarine Blue Powder is a blue pigment of sodium alumino silicate containing sulphur. It is widely used for coloring and optical whiteness in plastics, rubber, inks, paints, cosmetics, detergents, cement, textile and paper. It is prepared by heating kaolin, sodium carbonate, sulfur and other inexpensive ingredients together. It features heat and alkali resistance.
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