ʻO ka nānā ʻana ma mua o ka hoʻonā ʻana i ka wela he kaʻina hana mua e nānā i ka maikaʻi o ka ʻili o ka huahana a me nā ana e like me nā kūlana ʻenehana,make forgingkaha kiʻi a me ka hana kāleka ma hope o kake kalaiwa anapau ke kaʻina hana. Pono ka nānā pono ʻana i nā ʻano penei:
①ʻAʻohe māwae ka helehelena, ʻaʻohe kalai ʻana i ke apo wela i ka maikaʻi o ka ʻōpala, ka ʻili oxide a me ka ʻeha a me nā hemahema ʻē aʻe.
②ʻO ke kaha kiʻi nui omake forgingspono e hōʻike i nā ana nui, nā ʻāpana ʻano kūikawā, nā ʻāpana cross-section, ke ʻano a me kahi o nā lua.

③Ka nui a me ka pololei omake forgingsʻO nā ʻāpana i mālama ʻia me ka wela e hōʻike i ka ʻae ʻana i ka mīkini, ka ʻeleʻele o ka ʻili, ka pololei o ke ana, ka pololei o ke kūlana a me ka pololei o ke ʻano.
④na luna nana e like me ka nui omake forgingspūʻulu 10% -20% wahi nānā ma lalo o ka puʻe, i ka wā i hoʻopaʻa ʻia ai ka pūʻulu o ka mākaʻikaʻi wahi e like me ke kaha kiʻi, hiki ke komo i ke kaʻina nānā. Pono e hoʻokaʻawale ʻia nā forgings i ʻike ʻia i kūpono ma mua o ke kinai ʻana.
⑤Ma mua o ke kinai ʻana, e nānā i ka papa waiwai o ka huahana i hoʻopau ʻia, 1-2nā kalaiwapono e waiho ʻia no ka laʻana (ʻaʻole hiki ke hoʻohana ʻia nā mea ʻōpala i ka peʻe a me ka māwae no ka laʻana), a pono e kaha ʻia ma kake kalaiwa ana"sampling" sample, e hōʻike i ka ʻokoʻa.
⑥Ma hope o ka nānā ʻana, pono e hoʻopiha pono ʻia ka helu o nā huahana i hoʻopau ʻia, ka helu o nā huahana ʻōpala hiki ke hoʻoponopono ʻia, ka helu o nā huahana ʻōpala hope loa a me ke code defect e hoʻopiha pono ʻia i ke kāleka e pili pū ana, a kau inoa ʻia e ka mea nānā.