val oreIntoCopperIngot = [
		<gregtech:ore_copper_0:*>,
		<gregtech:ore_chalcopyrite_0:*>,
		<gregtech:ore_cuprite_0:*>,
		<gregtech:ore_tenorite_0:*>,
		<gregtech:ore_bornite_0:*>,
		<gregtech:ore_chalcocite_0:*>,
		<gregtech:ore_tetrahedrite_0:*>,
		<gregtech:ore_malachite_0:*>
	] as IItemStack[];

for i in oreIntoCopperIngot {
	furnace.addRecipe(ingotCopper, i, 1);
}