Plant or vegetable substance used to change the colour of something, for example cloth.

Investigating the Influence of the Kettle Material on Dyeing in the Industry of Pompeii

K. Kania (DE),
H. Hopkins (UK) and
S. Ringenberg (DE)
7th UK EA Conference Cardiff 2013
***Dyeing, especially in bright, intense colours, has been one of the methods used to embellish textiles and add to their value. A considerable dyeing industry can be shown to have existed in Pompeii. The city of Pompeii was destroyed in a volcanic eruption in AD 79, but its remains were preserved in situ...