I don’t know. But how are those beautiful colours in old carpets or Egyptian Coptic textiles like the one in the image above still holding their brightness? Or even earlier, this rug, now in the Hermitage which dates to 400BC? In my search for sustainable natural dyeing I came across the fermentation method as practiced by Manfred Bierber. The carpet pictured above also seems to have been made using the same technique. I don’t know […]