ʻO ka ipu lepo i pena ʻia e pili ana i ka ipu lepo ʻalani-ʻulaʻula i poni ʻia, i hōʻike ʻia me nā puaʻa mineral maoli, ʻocher a me manganese oxide ma ke ʻano he mau mea waihoʻoluʻu, a laila puhi ʻia i loko o kahi kiln. Ma ke kino ʻalani-ʻulaʻula e hōʻike ana i kahi hiʻohiʻona nani o ka ʻulaʻula ʻulaʻula, ʻeleʻele, keʻokeʻo, a me nā waihoʻoluʻu like ʻole, e hana ana i ka ipu lepo me kahi kiʻekiʻe o ka lokahi ma waena o ke kumu a me ke ʻano o ka ipu, a loaʻa ka hopena hoʻonaninani a nani.