did you prep it first with soda ash? (i used to tie dye for a local head shop, and had to learn about soda ash the hard way- after ruining a few shirts)
if not, you can still do it- you'll find it with the powdered dyes in any craft store. follow the package directions. it primes the fabric to accept the pigment, and helps set it, so it won't bleed out and fade later.
also, if you used LIQUID dye, don't purchase it again, it is a convenience item, in that you are less likely to have a mess with a liquid than a powder, which can go airborne. it is nowhere near as concentrated as powder. use TWO pouches of powdered dye, and the minimum amount of water, use very hot, preferably boiling water- this can be done in your washer, so that cleanup is easy. you can bleach the washer when you're done.
i'm guessing that this is not a normal t-shirt, or you wouldn't go out of your way. if you try again, that ought to work.
at 5:29 PM on Oct. 6, 2009