Here the troubles of the industry did not end, for just as indigo had runined 'the Waid Herrn', so the researches of the chemical laboratories of Germany threatened the very existence of any natural vegetable dye. They first killed the maddar dye of Europe, then the safflower, the lac and the al dyes of India, and are now advancing rapidly with synthetic indigo, intent on the complete annihilation of the natural dye..."
(From The Commercial Products of India by Sir George Watt.)
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