Use Retayne, available at many quilt shops and online, for instance:
http://www.amazon.com/Retayne-Color-...ywords=retayne
Treat the fabric as stated on the label, then wash again. If it still bleeds (rare, but it happens) discard it or use it in a wall hanging!
I agree that vinegar, salt etc. worked in the past on the dies that were used then. Most new chemical dies are not affected by any home made treatments.