He mea hanga te ngongo whakamahana oumu ki te MgO kua whakarerekētia kounga teitei hei whakakī, me te maitai kore waikura hei anga. I muri i te whakaiti i te ngongo, ka uru ki te oumu hei tango i te makuku. Ka taea e ia te whakapiko i tetahi āhua kia rite ki ngā hiahia o te kaiwhakamahi. He whānuitia te whakamahinga i roto i ētahi oumu me ētahi atu taputapu whare.
I mua i te uiuinga, tukuna mai ki a mātou ngā taipitopito i raro nei:
1. Te tuku mai i te tuhi, i te pikitia tūturu rānei ki a mātou;
2. Te rahi, te mana me te ngaohiko o te whakamahana;
3. Ngā whakaritenga motuhake mō te whakamahana.
















