How To Dye Yarn With Acid Dyes. Mix 5g of citric acid (or 2 teaspoons of distilled vinegar) into 1 litre of tap water and soak the material thoroughly. Dyeing around ph 5 will help to control the dyeing rate.
After adding hot water, boil the dye until the dyes are fully dissolved. Use the disposable spoon, or pour the dye liquid directly onto the fiber. See this notice about the safe handling of dyes.
Add enough water to just cover the yarn, push aside and add 1/2 cup vinegar.
Add hot water to the cup and use the spoon to mix the whole thing together. Fibers like wool, nylon, and silk often bond with acid dyes. The contents of one package will dye one pound (dry weight) of material to the full shade. Basic instruction for acid dye.