Download Safety Data Sheet The basics Simple to use, Dylon Permanent Dyes hold their colors well; they won't fade and wash away over time. The benefits Available in 17 vibrant colors, these dyes come in spill-free plastic envelope packaging.  The uses They're fiber reactive and suitable for all natural fabrics and polyester cotton blends. The pro tip Dylon Permanent Dyes are also specially designed for hand dyeing in warm water straight from the tap. 50 gram (1.75oz) packs, dye 1/2 pound dry weight fabric for the most brilliant shades and much more for lighter shades.