Textile industry leather chemicals supplier DyStar is planning to expand the capacity of its indigo plant in Nanjing, China, to produce its Indigo Vat 40% dye. The history of synthetic Indigo goes all the way back to 1897, with the introduction of, “pure indigo” from BASF. Demand for synthetic Indigo dyes was so huge that by 1913, natural indigo...

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