Natural Dyeing

Boil colour out of onion skins, husks and leaves, then dye with it

Where tie-dye is about the binding, this is about where the colour comes from. You cook it yourself out of skins, husks and leaves, so the same plant gives you a different result in another season or another water supply. A mordant is what makes it bite into the fibre, and cotton takes it very differently from wool. The colours shift as they age, which is treated as the point.