As mentioned earlier, my experiment with birch bark dyeing last week was a complete failure, but I already had some wet wool so I decided to play. One of our camp children was having some challenges with wet underpants, so we saved the wash water in an aluminium pot, in hopes of there being a bit of ammonia. There was almost certainly not enough, and we hadn’t fermented it to extract the ammonia, but we were amused by the experiment. I added some onion skins that I had brought along, and then set the pot on the fire. I had forgotten my alum, and didn’t have enough onion skins in the pot for the amount of wool. The result was a pallid pinky beige.
Undaunted, I brought it home and redyed it using the proper proportion of onion skins, plus alum and cream of tartar. I remembered to mordant properly by soaking the wool in the water and mordant, then heating everything for 45 minutes. Meanwhile, I had been cooking the onion skins for the same amount of time. I added the wool to the onion skin bath and let it cook for another hour or so, then allowed it to sit for approximately 36 hours. The end result was darker than my first onion dye experiment: https://siglindesarts.wordpress.com/wp-admin/post.php?post=746&action=edit
Here is a picture of the new wool:
Here they are together, for comparison: