RIT All-Purpose Liquid Dye is a fabric dye for refreshing colour or creating custom effects on compatible washable materials. Use it on natural fabrics such as cotton, linen, silk, wool, ramie and rayon, and on nylon, following the instructions for sink, bucket, stovetop or washing-machine dyeing. For best colour, pre-wash the item, keep water hot and test colour first. Use DyeMore instead for synthetics.