New study shows people used natural dyes to color their clothing thousands of years ago

ScienceDaily | 4/17/2019 | Staff
elio25 (Posted by) Level 3
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Chemists Dr Annemarie Kramell and Professor René Csuk from MLU examined two ancient textile samples. One comes from the ancient Chinese city of Niya and was probably once part of a shirt. It is over 2,000 years old. The other sample comes from Peru and dates back to 1100 to 1400 AD. It was produced by the Ichma people who lived in Peru at that time. Today, there is often little evidence of the colourfulness of such ancient clothing. "Time has not treated them well. What was once colourful is now mostly dirty, grey and brown," says René Csuk. Over time, the natural dyes have decomposed as a result of the effects of light, air and water, explains the chemist. In the past, only natural dyes were used. "The roots of a genus of plants called Rubia, for example, were used to create the red colours, and ground walnut shells produced the brown tones," says Annemarie Kramell. Even back then, people mixed individual materials to create different shades.

The researchers have developed a new analytical method that allows them to detect which materials were used for which colours. With the aid of modern imaging mass spectrometry, they have succeeded in depicting the dye compositions of historical textile samples as isotopic distributions. Previously, the dyes had to be removed from the textiles....
(Excerpt) Read more at: ScienceDaily
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