Dying with ammonia is not nearly as pleasant as dying with vinegar, but cotton and bamboo are not as dye friendly as wool.  Spilling a vinegar dye on my arm isn’t such a great concern.  It will wash off if I get to it fast enough.  It seems the blue ammonia based dye I mixed up to dye a shirt for my husband, simply won’t scrub off, no matter how quick my response is.

Oh and the smell….