I have been experimenting with avocado pits and skins on sheep wool. I chopped up pits and skins and added them to soaked border leicester fleece and kept it on a low simmer for about 24 hours. It came out as a pinkish color with a touch of apricot.
Then, I did 2 pots of soaked merino fleece: to one pot I added pits only, to the other, skins only. I ended up with a dusty/earthy pink. Very dull, which is not surprising. Merino fiber has no shine at all.
Border leicester wool has a touch of shine, just enough to notice a little more richness in color when dyed. The trade-off in this example is that it is not as soft as merino. On the other hand it is more durable.
Many dyers using avocado simmer the pits/skins in water, strain, and add just the water to the dyebath. I did not do this because my stove was awaiting repair. I dye in large stainless steel electric pots (they are meant for water bath canning). It occurs to me now that I could have simmered the avocado stuff in the big pots first and then strain them out, but I didn’t. Either I was too impatient or too dense. Probably some of both.
Apropos of impatience, each experiment used only 4 or 5 avocados. Now I am collecting skins and pits and adding them to a freezer bag (from what I have read, freezing does not interfere with avocado dye production). When I get around 20 or so I will try again to see I more dyestuff will give a deeper color. I expect it will.
"'They spread the dyed wool out on a field for several weeks in direct sunlight, then put it in a barn as bedding for their animals before rinsing it out in a stream or river."
I found this fascinating tidbit in the abstract of a research article about a wool rug whose colors are still brilliant after 2500 years. Immediately I thought of the permies fabric and dyeing contingent.
WOW...so, they spread it out in the sun for several weeks, to let the sun work it, then they put it into the barn and used it as bedding. which means the animals slept on it, among other things, then they took it and rinsed everything out of it in the river or stream... then they dyed and spun it, and wove rugs with it.
Interesting! I wish I had a few acres and could have a few sheep; I would want to experiment with this technique.