Aluminium Melting Furnace INKASA Aluminium is fully supported by Indonesia’s first and only primary aluminium ingot smelter “INALUM” (state owned company) with the capability to produce 99.9% purity aluminium ingot. INALUM had played an integral part in the development of INKASA Aluminium extrusion quality due to its proven capability to maintain a very high and consistent quality aluminium ingot.