Yes, wash in/wash out dye washes out over about a few weeks some dyes last about 6 weeks. The wash in/wash out dyes are mostly made of vegetable oil so it's safer and certainly wash out :)
l'oreal casting cream. i have used it at least 12 times. its good it lasts for about 4 weeks. i think. you can buy it from sainsburys, asda, tesco etc. its also the one cheryl cole uses :):):):)