Wool Tincture Dye is an acid dye suitable for dyeing protein fibers in a very safe and easy-to-use application. Each individual packet is premeasured for you to achieve a predictable color using 100 g. of clean wool. There is no measuring and no mixing, as the dye itself as well as the citric acid are each contained in a tea bag that you put into a jar of hot water with your skein of yarn. In about 20 minutes your hand-spun yarn is effortlessly and beautifully dyed. See all the color choices available below.