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ʻŌwili hao kila NO.4
ʻO NO.4 kahi i kahaki ʻia a i hoʻonani ʻia, ua like ia me ka ʻaoʻao HL, akā ʻokoʻa iki, maʻamau inā ʻike mākou i kahi laina lōʻihi a hoʻomau ʻo HL ia, ʻo NO.4 a ʻo NO.3, NO.5. etc.
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ʻŌwili hao kila BA
ʻO ka papa BA kahi hoʻopau kūikawā, e like me ka hoʻopau aniani akā ʻaʻole lawa ke aniani e aniani. Kāhea ʻia ka annealing Bright me he annealing maikaʻi loa, ʻo ia ka hoʻopili ʻana i nā huahana i kahi ākea i hoʻomaha mālie ʻia ma kahi o 500 kekelē, a laila hana i nā huahana anuanu maoli i loko o ka wahi i hoʻopaʻa ʻia, ma hope o ka loaʻa ʻana o ka ʻōlinolino a me ka nani, a me ka ʻole o ke kumu kulana decarburization.
