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How cow urine became an unlikely ingredient in art and photography

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a shade…achieved with no other pigment”.Possibly originating in Persia and used in Mughal, Rajasthani and Pahari paintings between the 16th and 19th century, it found its way to Britain … Dinkar notes that in the very year Photogen was devised in Britain, a company in the United States started manufacturing saltpetre from Peruvian sodium nitrate “to break free from British