These dyes are designed to permanently dye protein based fibers (wool, silk, angora, mohair, alpaca, soy silk and nylon).
Washfast Acid Dyes: The 1 oz. container will dye 4-8 lbs. Use with white vinegar or citric acid.
Available Color Card shown below with dyed samples of wool yarn.
If you like PRO WashFast Acid Dye, you may also like Country Classics Dye.