Ko te kōwhai kōwhai, e mōhiotia ana i roto i te matū ko te chromate mata (PbCrO₄), he tae kanapa, hihiri hoki e whakanuia ana mō tōna tae kaha. I hangaia tuatahitia i te tau 1809 e te matū Wīwī a Louis Nicolas Vauquelin, ā, i tere te rongonui hei huarahi utu iti hei whakakapi i ngā tae kōwhai tuku iho pērā i te orpiment. I ahu mai te ingoa o te tae i te chromium, te huānga i kitea i ngā whakamātautau a Vauquelin i runga i te kohuke crocoite, he puna tūturu o te chromate mata.
Ko te whakaputanga o te kōwhai kōwhai he tukanga matū mō te whakatōtō. Ka tauhohe ngā tote mata ki ngā matū kōwhai, ki ngā matū dikōwhai rānei i roto i te wai, ka hanga he matūriki angiangi o te kōwhai mata. Mā te whakarerekē i ngā āhuatanga tauhohenga, ka taea e ngā kaihanga te whakaputa i ngā tae rerekē, mai i te kōwhai pīrori marama ki ngā karaka hohonu, momona. Ko ngā rahi matūriki iti ka puta he tae māmā ake, ko ngā matūriki nui ka puta he tae pōuri ake. Hei whakarei ake i te pumau me te mahi, he maha ngā wā ka whakamahia ngā maimoatanga mata, hei tiaki i te tae mai i te pirau taiao.
Wā tuku: Pipiri-13-2025