Used with Dylon Cold Dye Fix or washing soda, gives permanent colour to cotton, linen and viscose, with lighter shades on wool, silk & polyester/cotton mixes. > Cold Water Dyes use by hand – ideal for craft work Used with Dylon Cold Dye Fix or washing soda, gives permanent colour to cotton, linen and viscose, with lighter shades on wool, silk & polyester/cotton mixes.