Dylons long-selling productNatural fibers, rayon, nylon and so on you can dye a variety of materials according to your ideas.Hot water dyed, but no heating required.Place this product and salt in warm water to dye it.Can be used for 2 t-shirts (8.8 oz (250 g).When dyeing black or dark colors, please double the product. Dyeing materials (natural fibers such as cotton, linen, hair, and silk.or nylon, rayon, etc.). *Acrylic, polyester, waterproof materials, etc. will not be stained.