ʻO ka hao hao ʻulaʻula, melemele, uliuli, ʻōmaʻomaʻo, ʻeleʻele, ʻeleʻele.

* Hoʻohana ʻia i loko o nā ʻano pena he nui, me ka pena antirust, nā pena i loko/waho a me nā pena ʻaila.
* Hoʻohana ʻia no ke kala ʻana i nā mea hana, e like me nā pōhaku mosaic, no nā pōhaku lepo, ka papahele, nā tile waihoʻoluʻu, nā pā hale a me ke kinikini i hana ʻia e ke kanaka.
* Nā kala no ke kino seramika.
* Hoʻohana ʻia i ka ʻoihana pepa, esp.pepa laiki.
* Hoʻohana ʻia no ka waihoʻoluʻu ʻana o ka papahele epoxy plastic, kala no ka pitch.
* Hoʻohana ʻia ma ke ʻano he mea hoʻoheheʻe ʻoi aku ka pale ʻana no nā plastics.

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.