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Chemical elements / Electrical conductors / Reducing agents / Pigments / Purple of Cassius / Ultraviolet–visible spectroscopy / Aqua regia / Corrosion / Ultraviolet / Chemistry / Matter / Gold


Gold to purple Violet traces on Antique Marble Heinrich Piening In ancient times the colour purple or violet is usually associated with nobles and extravagance. To produce a “purple” colour various colorants like hae
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Document Date: 2014-01-11 17:33:43


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