Hi,
 
I am trying to find information regarding the earliest scientifically
proven uses of indigoid compounds as dyes or pigments (in the form of
indigo, woad or tyrian purple).  I have some info about tyrian purple
being found on pottery shards originating from the Late Bronze Age.  The
use of these colouring agents as textile dyes especially interests me.  I
would appreciate any assistance available.  Please e-mail me at:
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Thanks
 
Karen Crawford