Designed for hand dyeing using hotest tap water. Hand Dye gives permanent colour to natural fabrics such as cotton, linen and viscose; lighter shades obtained on wool, silk and polyester/cotton mixes. Perfectly suited for smaller items like shorts, vests or socks, and for delicates you'd rather not put in the machine like wool and silk. You have a rainbow of beautiful colours to choose from, and whether you're refreshing an army of black socks or want an uplifting hit of colour with vibrant tights you can be sure of beautiful colour and permanent results you'll be happy to show off!One pack will treat up to 250g/8oz dry weight of fabricand don't forget, for effective dyeing you'll need to add salt (see instructions for details).