Hōʻike nui ʻia ka hoʻohaumia ʻana o ka pollution ma luna o ka ʻili o ka pahu alumini 0 mokuʻāina. Ma hope o ka hoʻopili ʻia ʻana o ka pahu alumini, ua ho'āʻoʻia e keʻano o ka holoiʻana i ka wai, a ʻaʻole hiki i ke kiʻekiʻe i ʻōlelo ʻia ma ka hoʻāʻo palaki wai.
Hoʻohana nui ʻia ka pahu alumini e koi ai i ka hoʻāʻo holoi wai no ka paʻi ʻana, hui pū me nā mea ʻē aʻe, etc. No laila, the surface of the aluminum foil must be degreasing clean and reach the level specified by the water-washing test.
The main reasons for unclean degreasing: excessive oil on the surface of the aluminum box; excessive slitting tension; unreasonable annealing process.
