The reason for the parts is that I did two separate dyeing jobs using onion dye.
Now, I used what are branded as yellow onions, and collected the outer, papery skin in a bag. In hindsight, leaving it on the counter was a bad idea, I now have a collection bag in the freezer, since my bag got black powder with the skins. And smelled. But I persisted, got rid of the worst of it, and boiled in a pot with enough water to cover.
The skins will float. The general practice is to bring to a boil (BTB), and reduce to a simmer (RTS), and simmer for 30-45 minutes. While this was happening, I had my yarn (hand-spun, this time) soaking. The water in the pot got gradually more and more deep, rich orange/red in color, and smelled faintly of homemade onion soup.
After 30 minutes, I drained my dye through a sieve into my drained and squeezed yarn, and then poured that carefully back into the pot, and added a Tbsp of vinegar. Return to simmer for 30 more minutes.
I started this with an idea that it would be a marigold color at the end.
At the end of 30 minutes, it was as dark as I had wanted my coffee experiment to be.
However, when it was cooled, washed and dried, it had become a red/brown color that reminds me of our local fawns. When we have fawns.
I have a couple theories why this turned out the way it did. One, maybe I need to look into finding ‘vintage’ onions. That is, onions at a small stand that don’t have the big growers behind them, forcing their name onto the onion.
Two, maybe I used skins that were just... two old. They had grown brown, not yellow, so at a guess, the air had gotten in and oxidized whatever is supposed to make a yellow color, making it brown or red. Maybe similar to how an apple turns brown after it’s been cut.
Like most of my experiments into these old methods of getting dye from what’s available, it didn’t turn out the way I wanted. But I’m still happy with what I got.