How to Dye Fabric Black Naturally - Natural Black Fabric Dyes -Most irises grow from rhizomes which can be divided to create new plants. It is the roots/rhizomes of iris that will produce a black dye. I PREFER WALNUT HULL
Use vegetables and fruits to make these nontoxic natural dyes. Mordants/fixatives used: For fruit dyes, simmer the fabric in cup salt and 4 cups water. For vegetable dyes, simmer in one cup vinegar and four cups water.