I think onion skinss are amazing. It’s incredible how much colour they have in them. I used about 115 grams of onion skins to dye these yarns. I got the skins for free from my local supermarket. I might have gotten couple of strange looks while I was going through the onion box, collecting loose onion shells but it was definitely worth it.
I let the onion shells soak in water for one day before boiling them (in the same water) for two hours. For dyeing I used a variation of old wool yarns that I had mordanted earlier with alum. After shifting the dye bath I boiled the wool yarn in the dye bath for one hour (I kept the temperature at about 80 °C). After that I rinsed the yarn. Onion tends to release a lot of excess colour so it’s good to add some vinegar to the last rinsing water. I used wool yarns that I had previously mordanted with alum.
The first yarns on the left are from the first dyeing batch (88 g). I saved the dyeing liquid and dyed another batch of yarn in it(100 g). This batch is the yellow one in the middle. After that I used the colour liquid for the third time but added one teaspoon of madder powder and half a teaspoon of cream of tartar. These are the yarns on the right(77 g).
I think this is a good example of how different yarn qualities effect the dyeing result. I used both white and grey coloured yarns. With white yarn I got lighter oranges and yellows and with grey yarn stronger oranges and greens. I used ordinary onion shells but I also want to try red onion shells. I hear you can get a beautiful green from them. Has anybody tried red onion skins?