ʻO ke kala kila kila he ʻano mea hoʻonaninani palekana kaiapuni, ʻaʻohe methanol a me nā mea kūlohelohe ʻē aʻe, ʻaʻohe radiation, palekana ahi, kūpono no ka hoʻonani hale nui (ke kahua kaʻa kaʻa, ke kahua kaʻaahi, ke kahua kaʻaahi, ke kahua mokulele, a me nā mea ʻē aʻe).
Me ke kala kuhili ʻole a kokoke loa i ke ola o ka poʻe, ʻo ka mālama ʻana i kēlā me kēia lā a me ka hoʻomaʻemaʻe ʻana i ke ʻano ua lilo i mea hiki ʻole ke mālama ʻia.
1, hiki ke holoi ʻia ka lepo lepo a me ka lepo me ke kopa wai palupalu a me ka wai mahana.
2, hōʻailona, ​​kiʻiʻoniʻoni me ka wai mahana a me ka mea holoi palupalu e holoi ai.
Holoi ʻia ka mea paʻa me ka waiʻona a i ʻole ka solvent organik.
3, ka ʻili o ka ʻili, ka aila, ka ʻaila pollution, holoi me kahi lole palupalu, ma hope o ka mea hoʻomaʻemaʻe kūʻokoʻa a i ʻole ka hopena ammonia a i ʻole me kahi mea holoi kūikawā e holoi.
4, inā loaʻa ka waika, holoi koke me ka wai, a laila e hoʻohana i ka solution ammonia a i ʻole ka hoʻomaʻemaʻe ʻana i ka wai hoʻoheheʻe carbonated neutral, a laila hoʻohana i ka holoi wai ʻole a me ka wai mahana.
5, ka ʻili o ke ānuenue kila kila, ʻoi aku ka nui o ka hoʻohana ʻana i ka mea holoi a i ʻole ka aila i hoʻohana ʻia e ka hoʻohana ʻana i ka wai mehana ka holoi holoi ʻole hiki ke holoi ʻia.
6, hiki ke hoʻohana i ka 10% nitric acid a i ʻole ka holoi ʻana i ka mea holoi holoi, hiki ke hoʻohana i nā lāʻau holoi holoi kūikawā.

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