ʻEke ʻeke ʻeke lepo Metas i nā kūlana wela o ke kinoea maʻamau, ʻano ʻeke ʻeke lepo no ka ʻeke lepo kānana e koi ana i ka mahana ma lalo o 150 ℃, a i ka wela kinoea he mau manawa kiʻekiʻe.No ka mea ʻaʻole kūpono kēia mau lepo i loko o ka uahi a me ka lepo kinoea no ka hōʻiliʻili ʻana i ka ʻohi lepo uila ma muli o ka palena kūʻokoʻa kūʻokoʻa, hiki ke hōʻiliʻili wale ʻia e nā ʻeke lole a i ʻole nā ala ʻē aʻe;Inā pono e ho'ēmi i ka wela i loko o ka lepo ma lalo o 150 ℃, ʻoi aku ka kiʻekiʻe o ka hoʻopukapuka ʻana a i ʻole nā palena o ka pūnaewele;No ka mea, loaʻa i ke kinoea lepo nā ʻāpana sulfur, loaʻa i ke kinoea lepo ka waikawa "dew point", hiki ke piʻi wale ma luna o ka wahi hau waika, ʻo ia hoʻi, kiʻekiʻe ka mahana ma ke ʻano o ka kānana a me ka hoʻokaʻawale ʻana a me nā kumu ʻē aʻe, no laila pono ʻoe e loaʻa kahi ʻano. o ke kū'ē i ke kiʻekiʻe wela kemika fiber i hoʻohana ʻia no ka hana ʻana i nā mea kānana, kūpono ka ʻeke kānana metas needled felt no kēia mau manawa.