Dye Lock™ does not remove colo r from your clothes. There is always some dye that bleeds into the laundry water every time you wash your coloured clothes. Sometimes like with a new RED blouse or shirt, that loose dye can be a lot. When you add a Dye Lock™ fabric sheet into your wash load, it captures all this loose dye and prevents it from staining back onto your other garments. Once Dye Lock™ attracts this loose dye it will never let it go, keeping all your colours safe and bright! Just as long as there is a Dye Lock™ fabric sheet in your washer, your clothes will always be protected! A Dye Lock™ fabric sheet can be used again and again up to 30+ washings.