Thanks Ted and all other contributors!(posted 8396 days ago)I've not been able to source ammonium thiosulphate here in Australia yet. I notice that the formula for TF-2 contains sulfite. Is the concentration of that (15g /Litre) high enough to interfere with the stain? Would I be better off to use a plain hypo fixing bath? I don't mind if it's one-shot or won't keep.