Isidingo semboni ye-downstream sesiqale ukusimama muva nje.Amanani ezinto ezingavuthiwe i-meta-phenylenediamine, i-cobalt chloride, ne-cobalt sulfate akhuphukile.

Abakhiqizi bakadayi abaningi baye balungisa amanani abo.Njengoba isidingo se-m-phenylenediamine sikhuphuka, amanani odayi wokuhlakaza kanye ne-resorcinol azokhuphuka.