Synthrapol should remove the bleed even if it has dried. Most dyes used commercially these days are set chemically, not by heat. Synthrapol does require lots of hot water, and you might have to use it several times, but I have seen it work to remove bleeds. Just be aware that domestic front loaders do not use enough water; you really need either a domestic top-loader or a laundromat front-loader to get enough water and the water needs to be HOT.