-Incazelo:Udayi ongancibiliki emanzini oguqulwa ube ifomu elincibilikayo ngokuphathwa nge-ejenti yokunciphisa ku-alkali bese uguqulelwa esimweni sawo esingancibiliki nge-oxidation.Igama elithi Vat lasuselwa emkhunjini omkhulu wokhuni okwaqalwa ngawo udayi we-vat.Udayi we-vat wangempela yi-indigo etholakala esitshalweni.

-Umlando: Kuze kube yiminyaka yawo-1850, bonke odayi babetholakala emithonjeni yemvelo, ngokuvamile emifino, izitshalo, izihlahla, nama-lichens nabambalwa ezinambuzaneni.Cishe ngo-1900 uRene Bohn waseJalimane walungisa ngephutha idayi eluhlaza okwesibhakabhaka evela endaweni ye-ANTHRA, ayiqamba ngokuthi idayi ye-INDIGO.Ngemva kwalokhu, u-BOHN kanye Nozakwabo asebenza nabo bahlanganisa ezinye eziningi ze-VAT DYES.

-Izici ezijwayelekile zamadayi e-Vat:Ayincibiliki emanzini;Ayikwazi ukusetshenziselwa ukudaya ngokuqondile;Ingaguqulwa ibe ifomu elincibilikayo emanzini;Iqukethe i-cellulosic fibers.

-Ububi:Ibanga lomthunzi olinganiselwe (umthunzi okhanyayo);Izwela ekuhutsheni;Inqubo yokufaka isicelo eyinkimbinkimbi;Inqubo enensayo;Ayifanele kakhulu uvolo.