I took a natural dying class some time ago and have had some fun with copper dying.
If you soak copper (tubes, dish scrubbers, etc) in a solution of ammonia and water,
you get some beautiful greens depending on how long you soak the copper tubing.
The actual dying had to be done outside (for obvious reasons)
and the wool had to be rinsed well to remove the ammonia which can be damage the fiber.
I started out spinning the roving, but the wool wasn't the easiest to spin,
so I gave up and put it away until I got the idea to weave with the roving.
I had enough of the handspun yarn to warp my tapestry loom.
When I took it off the loom, I realized it wasn't large enough.
I'd always wanted to try Tunisian Crochet and I had dyed a couple of skeins
of
Lion Brand Fisherman's Wool earlier also.
This was the perfect match for my rug.
Tunisian Crochet tends to roll so I had to really soak it when I blocked it.
I later added another crochet edging (not shown) to keep it from curling.
All in all I'd way it was a good experiment and looks great in my bathroom.