Usage:Use 1 bottle for 2 lbs dry fabric. For dark or bright colors, double dye quantity. Add 1 cup salt to dye bath for cotton, rayon, ramie, linen, or blends. Polyester or acrylic blends dye lighter. Not recommended for 100% polyester, acrylic, or fabrics with special finishes, rubber-backing, cold water wash, or labeled Dry Clean Only.