ʻO ka pāpaʻi kila lahilahi i ʻōwili ʻia ka pōkole o ke kila kila kila maʻamau. Ua kapa ʻia ʻo ia ka pā ʻōwili anu, i ʻike mau ʻia ʻo ka pā anu, a i kekahi manawa ua kuhi hewa ʻia ʻo ia he pā ʻōwili anu.
Hana ʻia ka pā anu me ke kila hoʻoheheʻe ʻia i ke kila wela, kahi i hoʻowili ʻia i loko o kahi pā kila me ka mānoanoa o lalo o 4mm.
No ka mea, ʻaʻole i hoʻohua ʻia ka pālākiō ma ka lumi wela, ʻoi aku ka maikaʻi o ka ʻili o ka pā anuanu a me ka pololei kiʻekiʻe. Hoʻohui pū ʻia me ka hoʻomaʻamaʻa annealing, ʻoi aku ka maikaʻi o kāna mau ʻano mechanical a me ka hana kaʻina hana ma mua o nā papa kila lahilahi i ʻōwili ʻia.
Ma nā kula he nui, ʻoi aku hoʻi Ma ke kahua o ka hana ʻana i nā mea hana hale, ua hoʻohana ʻia e hoʻololi i nā papa kila lahilahi i ʻōwili ʻia.