Traces of Blue Indigo on 34,000-Year-Old Grinding Tools Suggest New Paleolithic Plant Use Scenarios

New Evidence Reveals Humans Were Using Blue Indigo Dye 34,000 Years Ago

Traces of blue indigo dye were found on ancient tools. Credit: Laura Longo / CC BY 4.0 Researchers have uncovered the earliest known use of blue indigo dye by humans, pushing back the timeline of plant-based dyeing practices to 34,000 years ago. Traces of the dye, chemically identified as indigotin, were found on stone tools unearthed in Dzudzuana Cave in the Caucasus region of the country of Georgia. The discovery marks the first time such a co…

Traces of blue indigo on 34,000-year-old grinding tools suggest new Paleolithic plant use scenarios

An international research team coordinated by Ca' Foscari University of Venice has identified the presence of indigotin—a blue dye compound—on stone pebbles dating back to the Upper Paleolithic. This molecule, derived from the leaves of Isatis tinctoria L., a biennial plant in the Brassicaceae family native to the Caucasus and commonly known as woad, was found on ground stone tools.

Traces of blue indigo on 34,000-year-old grinding tools suggest new Paleolithic plant use scenarios - Tech and Science Post

An international research team coordinated by Ca’ Foscari University of Venice has identified the presence of indigotin—a blue dye compound—on stone pebbles dating back to the Upper Paleolithic. This molecule, derived from the leaves of Isatis tinctoria L., a biennial plant in the Brassicaceae family native to the Caucasus and commonly known as woad, was found on ground stone tools. This is the first time indigotin—a blue secondary compound, als…

Archaeologists Find Traces of Indigo Dye on 34,000-Year-Old Grinding Tools from Georgia

Archaeologists from the Ca’ Foscari University of Venice and elsewhere have found traces of indigotin -- a blue secondary compound, also known as indigo -- on unknapped ground stone tools recovered from Dzudzuana Cave, located in the foothills of the Caucasus in Georgia. The post Archaeologists Find Traces of Indigo Dye on 34,000-Year-Old Grinding Tools from Georgia appeared first on Sci.News: Breaking Science News.