Rit DyeMore Synthetic Fiber Dye is a liquid dye ideal for use on fibers such as polyester, polyester and cotton blends, nylon, acetate and acrylic. Although great for use on such fibers, this dying process should not be used on any fabrics requiring dry clean services only. Made in the USA, this dye should be shaken well before use. Note that the dye instructions come on the back of each bottle.