- black beans
- fabric or yarn
- iron liquor
Soak 1 cup of black beans in enough water (more water won’t weaken the dye solution, but the fabric will dye more evenly). Be careful: the black beans will also stain your soaking pot, such as a porcelain bowl. Don’t ask me, how I know! 😉
Let the beans soak for about 24 hours.
Mordant your yarn or fabric with iron liquor.
Remove the beans from the dye solution (and use them for cooking). The dye solution is now dark blue. Soak the fabric or yarn in the dye solution as long as you like. Then rinse in water.
I’ve used cotton yarn, and let it soak about 12 hours.
Here are some dye experiments which I’ve made with black beans.