-Ingcaciso:Idayi enganyibilikiyo yamanzi eguqulwa ibe yifom enyibilikayo ngokuphathwa nge-agent yokunciphisa kwi-alkali emva koko ibuyiselwe kwimo yayo enganyibilikiyo nge-oxidation.Igama leVat lithatyathwe kwinqanawa enkulu eyenziwe ngeplanga apho iidayi zevat zaziqale ziqatywe khona.Idayi yokuqala yevat yi-indigo efunyenwe kwisityalo.

-Imbali: Kuze kube yi-1850s, zonke iidayi zafunyanwa kwimithombo yendalo, ngokuqhelekileyo kwimifuno, izityalo, imithi, kunye ne-lichens kunye nezimbalwa ezivela kwizinambuzane.Malunga nowe-1900 uRene Bohn waseJamani ngempazamo walungisa idayi eluhlaza ukusuka kwindawo ye-ANTHRA, awayibiza ngokuba yidayi ye-INDIGO.Emva koku, u-BOHN kunye nabaSebenzi bakhe badibanisa i-VAT DYES ezininzi.

-Iimpawu eziqhelekileyo zedayi yeVat:Ukunganyibiliki emanzini;Ayinakusetyenziselwa ngokuthe ngqo ukudaya;Inokuguqulwa ibe yifom enyibilikayo yamanzi;Ukuba nobudlelwane kwimicu ye-cellulosic.

-Izinto ezingeloncedo:Uluhlu lomthunzi olulinganiselwe (umthunzi oqaqambileyo);Uvakalelo kwi-abrasion;Inkqubo yesicelo enzima;Inkqubo ecothayo;Ayifanelanga ngakumbi uboya.