It’s blueberry season! A great time for dyeing yarns.
How does this work? In my case, a bit randomly.
It’s a little misleading, tho, to think that blueberries
equate to blue dye, unless it’s on your tongue. More like
violet or a mauvey lavender.
I did a few skeins and ended up with varied results. I’m
definitely not an expert and would rather experiment
freely than follow a formula. But I think I used too much
vinegar because the shades I got were darker, rather than
bluish. Wool is a protein fiber and requires an acid dye
bath. (In contrast, cotton needs an alkaline dye bath.)
Since mine were not so clear, I overdyed a couple with a
fiber-reactive blue. In the photo, those are the darker
You can try this easily yourself, but natural dyes also
require a “mordant” – a chemical to make it stick. These
are various minerals (chrome, copper, tin) and are usually
toxic and used in minute doses. But the simplest is alum,
available at the supermarket.
My yarns pick up some “debris” from the berries, but
after drying and brushing, they retain the natural softness
of the Shetland sheep. Mixing varied shades and textures
gives a more interesting weave. Or knit or crochet item. Try
it; it’s fun.