ʻO nā puka liʻiliʻi like ʻole i ʻike ʻia e ka mālamalama ma ka ʻili o ka pahu alumini i kapa ʻia ʻo pinholes. Ke emi nei ka mānoanoa, piʻi ka helu o nā pinhole, ʻO ia kekahi o nā hemahema nui o nā mea foil.

ʻO ka lepo i ka billet, ma ka owili, i ka ʻaila ʻōwili, a hiki i ka lewa ka nui o kahi 6 μm a komo i ka ʻāpana ʻōwili, ka mea e hana ai i nā pinhole. No laila, hiki ole ke 65m alumini pepa ka loaʻa ʻole o nā ʻiʻo. Hiki ke loiloi wale ʻia e ka nui a me ka nui.

Me ka hoʻomaikaʻi ʻana i ka mana i hoʻonohonoho ʻia o nā lako alumini foil, ua hoʻomaikaʻi ʻia nā kūlana o ka alumini alumini, ʻoi aku ka maikaʻi o ka kānana ʻana i ka pale ʻana i ka lepo a me ka ʻaila ʻōwili a me ka hoʻonohonoho ʻana i ka ʻōnaehana hoʻololi wikiwiki, no laila e hilinaʻi nui ʻia ka helu a me ka nui o nā pinholes i ka pahu alumini i ka maikaʻi o ka metallurgical a me nā hemahema mīkini o ka billet.

No ka mea, ʻo ka pinhole ka hoʻoheheʻe pinepine ʻana i ka hemahema, paʻakikī ka loaʻa ʻana o ka pilina pili me ka hemahema kumu. Ua mana'o 'ia he pili ka nui o nā pinhole i ke kinoea, hoʻokomo, pūhui a me ka hoʻokaʻawale ʻana.

Lawe i ka hoʻomaʻemaʻe wai alumini maikaʻi, kānana, a hiki i ka hoʻomaʻemaʻe palaoa ke kōkua i ka hōʻemi ʻana i nā pinholes.

Hoʻomaikaʻi i nā ʻano paʻakikī o ka mea, e like me ka hookui ana, hiki ke kōkua i ka hōʻemi ʻana i nā pinholes. Hiki ke emi iho ma lalo o 100/m² nā pahu o 6μm alumini foil i ʻōwili ʻia e nā blank pin alumini kiʻekiʻe.. I ke kaʻina hana ʻōwili alumini, nui nā kumu ʻē aʻe e kumu ai nā pinholes, hiki i ka pōʻino. ʻAʻole maʻamau nā kaukani pinholes i kēlā me kēia mika square. E hoʻoikaika i ka kānana o ka ʻaila ʻōwili.

ʻO ka hoʻololi pōkole o nā ʻōwili a me nā ana lepo e pono ai e hōʻemi i nā pinholes ma ka alumini alumini; ʻO ka hoʻohana ʻana i ka ikaika ʻōwili nui a me ka ʻōwili liʻiliʻi e kōkua pū i ka hōʻemi ʻana i nā pinholes.