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.
How to Make Natural Dyes to Dye Fabric & Clothes – 3 Easy Steps to Dyeing Naturally at Home--Looks like a simple, basic tutorial for beginners. Tells what "fixatives" to use for different types of plants.
How To Dye Fabric The Natural Way. Here’s a super easy project using turmeric powder to turn a boring white pillowcase into a gorgeous pop of color for your living room. There are no harsh chemicals or fumes involved.