Indigo

While India and Egypt often come to mind first, the oldest discovered indigo-dyed fabric actually dates back 6,000 years to Huaca, Peru.

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Indigo behaves differently than other dyes. Rather than dissolving like sugar in tea, its particles float on the water. To bind this color to fiber, artisans must rely on a specific chemical process in a controlled setting, giving rise to the traditional dye vat.