DYLON Multi-Purpose Dye is suitable for dyeing natural fabrics, nylon and Lycra. It is usually suitable for dyeing buttons and feathers. Multi-Purpose Dye is perfect for dyeing costumes and props for every type of theatrical productions – Suitable fabrics: cotton, linen, viscose, wool, silk, nylon and Lycra (elastane). – NOT for pure synthetics (aside from nylon), polyester/wool mixtures, or fabrics with special finishes. – Multi-Purpose Dye isn’t colourfast so garments must all the time be washed one at a time. 5g of powder is enough to dye as much as 250g/8 oz dry weight fabric.