iDye for Natural Fabrics Dyeing has never been easier than with iDye from Jacquard! iDye comes in a dis-solvable packet, so there are never any messy powders to handle: simply dissolve the packet in the dye bath or drop it in the washer, then add the fabric. iDye is a hot water dye that produces brilliant colors on any natural fabric and may be used on the stovetop or in the washing machine.