ʻO ka puaʻa hao hao he ʻano puaʻa me ka hoʻopuehu maikaʻi, kūpaʻa māmā maikaʻi a me ke kū ʻana i ka wā.ʻEhā mau ʻano puaʻa kala, ʻo ia hoʻi ka iron oxide ʻulaʻula, ka hao melemele, ka hao ʻeleʻele a me ka hao ʻeleʻele, me ka hao oxide ka mea kumu.Ma waena o lākou, ʻo ka ʻulaʻula hao hao ka waihoʻoluʻu nui (ma kahi o 50% o nā puaʻa hao hao).Hoʻohana ʻia ka iron oxide i hoʻohana ʻia e like me nā puaʻa antirust a me ka iron oxide i hoʻohana ʻia e like me nā mea hoʻopaʻa leo magnetic no ka ʻāpana o nā puaʻa hao hao.ʻO ka hao hao ka lua o ka puaʻa inorganic nui loa ma hope o ke keʻokeʻo titanium, a ʻo ka puaʻa anorganic nui loa.ʻO ka nui o ka hoʻohana ʻana i nā puaʻa hao hao, ʻoi aku ka nui o 70% i hoʻomākaukau ʻia e ka synthesis kemika, i kapa ʻia ʻo synthetic iron oxide.Hoʻohana nui ʻia ʻo Synthetic iron oxide i nā mea kūkulu hale, nā uhi, plastics, electronics, paka, lāʻau lapaʻau, rubber, ceramics, ink, magnetic material, pepa hana a me nā māla ʻē aʻe ma muli o kona kiʻekiʻe synthetic maʻemaʻe, ka nui o nā ʻāpana like ʻole, ka laulā kala ākea, haʻahaʻa. kumu kūʻai, non-toxic, maikaʻi loa kala a me ka hana noi, a me ka hana ʻana o ka ultraviolet.

ʻO ke ʻano 1. ʻO ka hoʻopuehu maikaʻi
2. ʻO ka māmā maikaʻi a me ke kū'ē i ka wā
3. Ke kū'ē i kaʻakika
4. Ke kū'ē i ka wai
5. Ke kū'ē i ka solvent
6. Ke kū'ē i nā kinikini'ē aʻe
7. Alkali kū'ē
8. Maikaʻi kala kala, ʻaʻohe kala koko a me ka neʻe ʻana