dyeing linen

[John M McDermott]

Tim Edwards wrote:

I must admit, it has long puzzled me that there seems to be an absence of evidence for dyed linen from the Roman world, from my own limited experience, it is not difficult to achieve.
I spent an afternoon examining coptic textiles from the V & A Museum, and found it odd that where coloured clavi and orbiculi were added to linen tunics, they always seemed to be executed in dyed wool.

This is interesting. I have not heard of linen tunics with clavii. Actually, I had expected linen tunics to be rare. How were the clavii attached?