Ma muli o ke kaʻina hana kuʻuna make-casting, ua hoʻomohala ʻia kekahi mau kaʻina hana i hoʻomaikaʻi ʻia, me kahi kaʻina hoʻoheheʻe non-porous e hōʻemi ana i nā hemahema hoʻolei a hoʻopau i ka porosity. Hoʻohana nui ia no ka hana ʻana i ka zinc, hiki ke hōʻemi i ke kaʻina hana injection pololei o ka ʻōpala e hoʻonui i ka hua. Aia kekahi mau ʻenehana hoʻoheheʻe make pololei hou i haku ʻia e General Dynamics a me ka hoʻolei make semi-solid. I ke one hoolei, solidification o haʻahaʻa kalapona kila ua solidified papa ma ka papa, oiai kiʻekiʻe kalapona kila i ka laulā crystallization wela laula e hana paʻa solidification.