Just put it in the dye and take your chances. I used liquid Rit purple. Make sure to dissolve the powder if that';s what your using. I'd do 5-10 minutes and check it. I always kept stirring it to make sure it came out even. Wash it, dry it, check it. Not enough? dye it again, a little longer, wash it dry it and check it. Basically trial and error. Mine was way too purple at first, then I added some different blues till I found something I could live with.