I saved the dye bath from the last post waiting for my little package of copper, or blue vitriol, to arrive. I knew it might make the wool more green so I added about a tablespoon full to the dye bath. This was the second batch of dyeing for the bath and it already had some alum in it. I didn't know what would come out. It turned out to be more of the khaki green I had read about. It's really an interesting color. I'm spinning some up to see it in a yarn.
I'll be doing another batch with fresh ingredients so I'll report back on that soon.