tried sodium hydrosulfite in hot water and it didn't work, used Jacquard decolourant activated by a steamer and it didn't workThere are people here with more knowledge that I but normally you have to use some sort of stripper. I don't know what you have available but a hydrosulphite stripper should work. You need to be careful and not let it dwell to long. Try a small area with a q-tip first then rinse. Yellow-Go is a titanium stripper I believe available at dry cleaning suppliers.