I bought some alum from eBay as that seems to be the most commonly used mordant and, for ease, some cream Regia sock yarn as it happened to leap out at me at a local wool shop. I decided to start off with birch bark for my first experiment. Now, living with an artistic wood carver husband has it's advantages because he just happened to have some rolls of birch bark stashed away :-)
|Cream sock yarn in the alum mordant solution|
|Inside of the birch bark|
|Outside of the birch bark|
|Finished yarn in daylight - love the colours!|
Notes to self
Yarn: Cream Regia sock yarn 2 x 50g balls
Mordant: 10% (so, 10g) alum. Yarn simmered for 1 hour, cooled overnight in liquid.
Dye extraction: 135g birch bark + handful brown onion skins. Bark simmered for 2.5 hours with onion skins thrown in for last hour.
Yarn dyeing: Yarn simmered in strained dye for around an hour, each third having roughly 15, 20 then 30 minutes.