Ideal for protein (i.e. animal hair) fibers such as wool and mohair, as well as silk and nylon, Jacquard Acid Dyes produce the brightest, most brilliant colors possible. The pigments come in concentrated powder form that you mix with hot water and a bit of citric acid. When used for immersion dyeing, the results are incredibly vibrant, uniform, and colorfast, so they won't bleed or fade with washing. Jacquard Acid Dyes can also be used for painting, stamping, and screen printing applications.