Refined Iron

Refined Iron is the material used in the Technic Pack to make the Machine Block, which is used to craft all IC machines.

To craft it, cook an iron bar in a furnace. The idea here is to refine the already smelted metal.

Note: Refined Iron can no longer be used to make any of the recipes that normal iron is used for, such as tools and armor. If you wish to return it to normal iron, grind the Refined Iron into dust using a Macerator, then cook that dust in a furnace.