I don't know what's available in your neck of the woods, but I've always found Pantene (not their colour care range, obviously!) to drastically fade my hair in a couple of washes. I use a mixture of SFX pinks which are usually long-lasting, but Pantene strips it out while leaving my hair in good condition.
I suppose others may have different experiences, but that's what I would suggest. (I stopped using it as I certainly didn't want to fade my colour!)