> It turns out it is not easy to definitely detect ancient indigo. Indigo molecules break down over time and can get washed out of fabrics. It takes extremely s

> It turns out it is not easy to definitely detect ancient indigo. Indigo molecules break down over time and can get washed out of fabrics. It takes extremely sensitive equipment to detect it. Tell me about it! Speaking as someone who has spent the better part of a decade wearing, caring, freezing, airing, soaking and meticulously washing indigo dyed raw denim jeans, I can only empathize with the efforts this must've taken on 6,000-year-old fabrics :) Thanks for sharing - Peruvians definitely just earned a point in my book for pioneering this fine, still-fashionable art.