Indian yellow is a complex pigment consisting primarily of euxanthic acid salts (magnesium euxanthate and calcium euxanthate), euxanthone and sulphonated euxanthone. It is also known as purree, snowshoe yellow, gaugoli, gogili, Hardwari peori, Monghyr puri, peoli, peori, peri rung, pioury, piuri, purrea arabica, pwree, jaune indien (French, Dutch), Indischgelb (German), yìndù huáng (Chinese), giallo indiano (Italian), amarillo indio (Spanish). The crystalline form dissolved in water or mixed with oil to produce a transparent yellow paint which was used in Indian frescoes, oil painting and watercolors. After application Indian yellow produced a clear, deep and luminescent orange-yellow color which, due to its fluorescence, appears especially vivid and bright in sunlight. It was said to be of a disagreeable odour. It was most used in India in the Mughal period and in Europe in the nineteenth century, before becoming commercially unavailable circa 1921.
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