I.Hoʻolauna Huahana:
Aia ka huahana i kahi kumu laʻana a me nā kikoʻī he ʻumi like ʻole o ka papa waena, kūpono no ka mānoanoa (0.1 ~ 0.58) mm o ka laʻana, he 10 mau kikoʻī, me nā papa waena like ʻole, hiki ke hoʻololi i nā mānoanoa laʻana like ʻole. Hoʻohana nui ʻia i ka hana pepa, ka hoʻopili ʻana a me ka nānā ʻana i ka maikaʻi o ka huahana a me nā ʻoihana nānā. He mea hana kūikawā ia no ka hoʻāʻo ʻana i ka ikaika o ke apo o ka pepa a me ka pepa pahu.
u Helu 1 0.100-0.140 mm
u Helu 2 0.141-0.170 mm
u Helu 3 0.171-0.200 mm
u Helu 4 0.201-0.230 mm
u Helu 5 0.231-0.280 mm
u Helu 6 0.281-0.320 mm
u Helu 7 0.321-0.370 mm
u Helu 8 0.371-0.420 mm
u Helu 9 0.421-0.500 mm
u Helu 10 0.501-0.580 mm